HydroGIS Viewer Data Dictionary

Table of Contents

Existing Hydropower Assets

New Hydropower Development Potential

Environmental Mitigation

Environmental Attribution

Hydrology




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Existing Hydropower Assets

Dam Layer

Layer Summary: A generalized subset of NHAAP hydropower dam data provided by ORNL as part of the NHAAP Database effort.

Attribute

Description

NHAAP Category “Dam Only", “EIA only", “FERC only", “FERC/EIA", “Non-fed on Reclamation Sites", “Non-fed on USACE Sites", “Reclamation", “Retired/withdrawal", “TVA", “USACE"
Dam Name Name of the dam.
Dam Owner Owner of the dam.
8-Digit Hydrologic Unit Code 8-digit hydrologic unit code from the Watershed Boundary Dataset.
State State that the dam is within.
County County that the dam is within.
City City that the dam is within.
Year Built Year the dam was built.
Dam Height (ft) Height of the dam.
Dam Length (ft) Length of the dam.
Maximum Storage (ac-ft) Maximum storage (ac-ft) of the dam.
Dam Type Type of dam.
Dam Purpose Purpose for the dam.
Water Source Primary water source of the dam.
Annual Mean Flow (cfs) Annual Mean Flow estimated by NHDPlus
Drainage Area (mi^2) Drainage area (mi^2) of the dam.
Surface Area (ac) Surface area (ac) of the impoundment at its normal retention level.
Residence Time (day) Residence time, estimated by d * (Reservoir Storage in ac*ft) / (Annual Mean Flow in cfs). d = 0.504 is a unit conversion factor
Mode of Operation “Canal/Conduit", “Intermediate Peaking", “Peaking", “Reregulating", “Run-of-river", “Run-of-river/Peaking", “Run-of-river/Upstream Peaking", “Storage", “Storage Releases"
Diversion Shows whether or not there is a diversion.
Diversion Length (mi) Length of the diversion (mi).
Bypass Length (mi) Length of the bypass (mi).




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Plant Layer

Layer Summary: A generalized subset of NHAAP hydropower plant data provided by ORNL as part of the NHAAP Database effort.

Attribute

Description

NHAAP Category “EIA only", “FERC only", “FERC/EIA", “Non-fed on Reclamation Sites", “Non-fed on USACE Sites", “Reclamation", “Retired/withdrawal", “TVA", “USACE"
Plant Name Name of the hydropower plant.
Plant Owner Owner of the hydropower plant.
Plant Owner Type Type of hydropower plant owner.
Dam Owner Owner of the main dam.
8-Digit Hydrologic Unit Code 8-digit hydrologic unit code from the Watershed Boundary Dataset.
Facility Type “Hydropower", “Pumped Storage", “Mixed"
EIA Plant ID Energy Information Administration Plant ID.
Permit Type “FERC Exemption", “FERC License", “HREA2013", “IBWC", “Not Required", “Reclamation", “Reclamation LOPP", Reclamation Others", “TVA", “Unknown", “USACE"
FERC Docket Number Federal Energy Regulatory Commission docket number.
FERC License/Exemption Issue Date Federal Energy Regulatory Commission date that either a license or exemption was issued.
FERC License Expiration Date Federal Energy Regulatory Commission license expiration date.
State State that the plant is within.
County County that the plant is within.
City City that the plant is within.
Water Source Primary water source of the main dam.
Mode of Operation “Canal/Conduit", “Intermediate Peaking", “Peaking", “Reregulating", “Run-of-river", “Run-of-river/Peaking", “Run-of-river/Upstream Peaking"
Hydropower Nameplate Capacity (MW) The nameplate capacity in megawatts for each hydropower plant.
Hydropower Net Generation (MWh) The net generation in megawatt hours from hydropower.
Hydropower Plant Factor (%) The plant factor for hydropower at each plant.
Pumped Storage Nameplate Capacity (MW) The pumped storage nameplate capacity in megawatts for each plant.
Pumped Storage Gross Generation (MWh) The pumped storage gross generation in megawatt hours for each plant.
Pumped Storage Plant Factor (%) The pumped storage plant factor for each plant.
Plant Year in Service Year that the hydropower plant came online.
NERC Region North American Electric Reliability Council region that each plant falls within (Source: NERC).
Balancing Authority Code The identifier code of the balancing authority for each hydropower plant (Source: NERC).
Balancing Authority Name The name of the balancing authority for each hydropower plant (Source: NERC).
Sector “Commercial CHP", “Commercial Non-CHP", “Electric Utility", “Industrial", “Industrial CHP", “Industrial Non-CHP", “IPP", “IPP CHP", “IPP Non-CHP"
Transmission and Distribution System Owner The transmission and distribution system owner for the energy generated by the hydropower plant.




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Generator Layer

Layer Summary: A generalized subset of NHAAP hydropower generator data provided by ORNL as part of the NHAAP Database effort.

Attribute

Description

NHAAP Category “Dam Only", “EIA only", “FERC only", “FERC/EIA", “Non-fed on Reclamation Sites", “Non-fed on USACE Sites", “Reclamation", “Retired/withdrawal", “TVA", “USACE"
Plant Name Name of the hydropower plant.
Plant Owner Name Owner of the hydropower plant.
8-Digit Hydrologic Unit Code 8-digit hydrologic unit code from the Watershed Boundary Dataset.
Facility Type “Hydropower", “Pumped Storage", “Mixed"
EIA Plant ID Energy Information Administration Plant ID.
EIA Generator ID Energy Information Administration Generator ID.
Nameplate Capacity (MW) The nameplate capacity in megawatts for each generator
Turbine Type The type of turbine.
Minimum Load (MW) Minimum load in megawatts
Time from Cold Shutdown to Full Load Time from cold shutdown to full load




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New Hydropower Development Potential

Non-Powered Dams > 1 MW Layer

Layer Summary: NHAAP Non-Powered Dam Analysis results for dams with potential capacity greater than 1 megawatt.

Attribute

Description

Dam Name Official name of the dam. No abbreviations used unless a part of the official name. For dams that do not have an official name, the popular name is used.
Owner Name Name of the owner of the dam.
County Name of the county in which the dam is located.
City Name of the nearest city, town, or village that is most likely to be affected by floods resulting from the failure of the dam.
State The two letter abbreviation for the state in which the dam is located.
Water Source Official name of the river or stream on which the dam is built.
Year Built Year when the original main dam structure was completed.
Maximum Storage (ac-ft) A calculated field based on the maximum value of Maximum Storage and Normal storage. Maximum storage, in acre-feet, which is defined as the total storage space in a reservoir below the maximum attainable water surface elevation, including any surcharge storage. Normal storage, in acre-feet, which is defined as the total storage space in a reservoir below the normal retention level, including dead and inactive storage and excluding any flood control or surcharge storage.
Federal Regulator Federal Agency Involvement in Regulatory. Code identifying which federal agency is involved in the regulation of the dam. Codes are concatenated if several agencies are involved.
Estimated Head (ft) Estimated Head (ft) available for hydropower generation. Head is estimated from one of the following ways: (1) NID Hydraulic Height, (2) 0.7 times NID Height, (3) USACE Locks and Dams Lift, or (4) the height difference from observed head water and tail water elevation. See ORNL NPD Resource Assessment Report for more details.
Annual Flow (cfs) Flow is estimated from one of the following ways: (1) NHD Plus annual mean flow, or (2) drainage area times unit runoff estimated from historic NWIS streamflow observation. See ORNL NPD Resource Assessment Report for more details.
JAN Flow (cfs) Flow is estimated from one of the following ways: (1) NHD Plus annual mean flow times ratios estimated from historic NWIS streamflow observation, or (2) drainage area times unit runoff estimated from historic NWIS streamflow observation. See ORNL NPD Resource Assessment Report for more details.
FEB Flow (cfs) Flow is estimated from one of the following ways: (1) NHD Plus annual mean flow times ratios estimated from historic NWIS streamflow observation, or (2) drainage area times unit runoff estimated from historic NWIS streamflow observation. See ORNL NPD Resource Assessment Report for more details.
MAR Flow (cfs) Flow is estimated from one of the following ways: (1) NHD Plus annual mean flow times ratios estimated from historic NWIS streamflow observation, or (2) drainage area times unit runoff estimated from historic NWIS streamflow observation. See ORNL NPD Resource Assessment Report for more details.
APR Flow (cfs) Flow is estimated from one of the following ways: (1) NHD Plus annual mean flow times ratios estimated from historic NWIS streamflow observation, or (2) drainage area times unit runoff estimated from historic NWIS streamflow observation. See ORNL NPD Resource Assessment Report for more details.
MAY Flow (cfs) Flow is estimated from one of the following ways: (1) NHD Plus annual mean flow times ratios estimated from historic NWIS streamflow observation, or (2) drainage area times unit runoff estimated from historic NWIS streamflow observation. See ORNL NPD Resource Assessment Report for more details.
JUN Flow (cfs) Flow is estimated from one of the following ways: (1) NHD Plus annual mean flow times ratios estimated from historic NWIS streamflow observation, or (2) drainage area times unit runoff estimated from historic NWIS streamflow observation. See ORNL NPD Resource Assessment Report for more details.
JUL Flow (cfs) Flow is estimated from one of the following ways: (1) NHD Plus annual mean flow times ratios estimated from historic NWIS streamflow observation, or (2) drainage area times unit runoff estimated from historic NWIS streamflow observation. See ORNL NPD Resource Assessment Report for more details.
AUG Flow (cfs) Flow is estimated from one of the following ways: (1) NHD Plus annual mean flow times ratios estimated from historic NWIS streamflow observation, or (2) drainage area times unit runoff estimated from historic NWIS streamflow observation. See ORNL NPD Resource Assessment Report for more details.
SEP Flow (cfs) Flow is estimated from one of the following ways: (1) NHD Plus annual mean flow times ratios estimated from historic NWIS streamflow observation, or (2) drainage area times unit runoff estimated from historic NWIS streamflow observation. See ORNL NPD Resource Assessment Report for more details.
OCT Flow (cfs) Flow is estimated from one of the following ways: (1) NHD Plus annual mean flow times ratios estimated from historic NWIS streamflow observation, or (2) drainage area times unit runoff estimated from historic NWIS streamflow observation. See ORNL NPD Resource Assessment Report for more details.
NOV Flow (cfs) Flow is estimated from one of the following ways: (1) NHD Plus annual mean flow times ratios estimated from historic NWIS streamflow observation, or (2) drainage area times unit runoff estimated from historic NWIS streamflow observation. See ORNL NPD Resource Assessment Report for more details.
DEC Flow (cfs) Flow is estimated from one of the following ways: (1) NHD Plus annual mean flow times ratios estimated from historic NWIS streamflow observation, or (2) drainage area times unit runoff estimated from historic NWIS streamflow observation. See ORNL NPD Resource Assessment Report for more details.
Potential Annual Generation (MWh) Potential Annual Hydropower Energy (MWh), a product of estimated flow (cfs), head (ft), efficiency (0.85), time (hr), and 1/11800 for unit conversion.
JAN Potential Generation (MWh) Potential January Hydropower Energy (MWh), a product of estimated flow (cfs), head (ft), efficiency (0.85), time (hr), and 1/11800 for unit conversion.
FEB Potential Generation (MWh) Potential February Hydropower Energy (MWh), a product of estimated flow (cfs), head (ft), efficiency (0.85), time (hr), and 1/11800 for unit conversion.
MAR Potential Generation (MWh) Potential March Hydropower Energy (MWh), a product of estimated flow (cfs), head (ft), efficiency (0.85), time (hr), and 1/11800 for unit conversion.
APR Potential Generation (MWh) Potential April Hydropower Energy (MWh), a product of estimated flow (cfs), head (ft), efficiency (0.85), time (hr), and 1/11800 for unit conversion.
MAY Potential Generation (MWh) Potential May Hydropower Energy (MWh), a product of estimated flow (cfs), head (ft), efficiency (0.85), time (hr), and 1/11800 for unit conversion.
JUN Potential Generation (MWh) Potential June Hydropower Energy (MWh), a product of estimated flow (cfs), head (ft), efficiency (0.85), time (hr), and 1/11800 for unit conversion.
JUL Potential Generation (MWh) Potential July Hydropower Energy (MWh), a product of estimated flow (cfs), head (ft), efficiency (0.85), time (hr), and 1/11800 for unit conversion.
AUG Potential Generation (MWh) Potential August Hydropower Energy (MWh), a product of estimated flow (cfs), head (ft), efficiency (0.85), time (hr), and 1/11800 for unit conversion.
SEP Potential Generation (MWh) Potential September Hydropower Energy (MWh), a product of estimated flow (cfs), head (ft), efficiency (0.85), time (hr), and 1/11800 for unit conversion.
OCT Potential Generation (MWh) Potential October Hydropower Energy (MWh), a product of estimated flow (cfs), head (ft), efficiency (0.85), time (hr), and 1/11800 for unit conversion.
NOV Potential Generation (MWh) Potential November Hydropower Energy (MWh), a product of estimated flow (cfs), head (ft), efficiency (0.85), time (hr), and 1/11800 for unit conversion.
DEC Potential Generation (MWh) Potential December Hydropower Energy (MWh), a product of estimated flow (cfs), head (ft), efficiency (0.85), time (hr), and 1/11800 for unit conversion.
NHAAP Regional Capacity Factor (%) Capacity factor of each power plant is computed by [ Annual Generation in MWh / (Installed Capacity in MW * 365 * 24). The 2001-2008 EIA generation and capacity are used to estimate the capacity factor for each hydropower plant, and then weighted-averaged by plant generation to estimate the regional capacity factor. See ORNL NPD Resource Assessment Report for more details.
Potential Capacity (MW) Potential Capacity (MW), estimated by [Potential Annual Hydropower Energy in MWh / (Cf * 365 * 24)].




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New Stream-Reach Development Energy Data Layer

Layer Summary: Aggregated Summary of Hydropower Potential from New Stream-Reach Development for the Conterminous United States. Data are from the resource assessment.

Attribute

Description

Watershed Name Name of the 10-digit watershed.
10-Digit Hydrologic Unit Code 10-digit Hydrologic Unit Code - Watershed Identifier from Watershed Boundary Dataset.
Number of >1 MW Stream-Reaches Number of >1MW stream-reaches identified by the ORNL NSD assessment
Potential Capacity (MW) The HUC10-level Total Potential capacity from identified stream-reaches with capacity greater than 1MW
Potential Annual Generation (MWh) Estimated potential annual energy at stream-reaches. See NSD methodology report for more details.
JAN Potential Generation (MWh) Estimated potential January energy at stream-reaches. See NSD methodology report for more details.
FEB Potential Generation (MWh) Estimated potential February energy at stream-reaches. See NSD methodology report for more details.
MAR Potential Generation (MWh) Estimated potential March energy at stream-reaches. See NSD methodology report for more details.
APR Potential Generation (MWh) Estimated potential April energy at stream-reaches. See NSD methodology report for more details.
MAY Potential Generation (MWh) Estimated potential May energy at stream-reaches. See NSD methodology report for more details.
JUN Potential Generation (MWh) Estimated potential June energy at stream-reaches. See NSD methodology report for more details.
JUL Potential Generation (MWh) Estimated potential July energy at stream-reaches. See NSD methodology report for more details.
AUG Potential Generation (MWh) Estimated potential August energy at stream-reaches. See NSD methodology report for more details.
SEP Potential Generation (MWh) Estimated potential September energy at stream-reaches. See NSD methodology report for more details.
OCT Potential Generation (MWh) Estimated potential October energy at stream-reaches. See NSD methodology report for more details.
NOV Potential Generation (MWh) Estimated potential November energy at stream-reaches. See NSD methodology report for more details.
DEC Potential Generation (MWh) Estimated potential December energy at stream-reaches. See NSD methodology report for more details.
Capacity Factor Capacity factor, estimated by (Potential Annual Energy in MWh) / (Potential Capacity in MW * 365 * 24)
Hydraulic Head (ft) Hydraulic head, estimated by reference height (ft) calculated from the FEMA 100-year flood elevation
Hydraulic Capacity Hydraulic capacity, estimated by the 30% exceedance quantile from the flow-duration curve
Estimated Surface Inundation (ac) Estimated surface inundation corresponding to the reference height, derived from the 3-meter resolution National Elevation Dataset.
Estimated Reservoir Storage (ac*ft) Estimated reservoir storage corresponding to the reference height, derived from the 3-meter resolution National Elevation Dataset.
Residence Time Residence time, estimated by d * (Reservoir Storage in ac*ft) / (NHDPlus Annual Mean Flow in cfs). d = 0.504 is a unit conversion factor
Flow Adjustment Ratio The flow adjustment ratio used to estimate the NSD hydraulic capacity from NHDPlus version 1 flow (Q30 = Q_ratio * QNHDPlus), derived from the USGS NWIS gauge observation.
Generating Efficiency Generating efficiency, assumed to be 0.85 in this study.




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New Stream-Reach Development Environmental Attribution Data Layer

Layer Summary: Summary of Environmental Attribution at HUC10 Watersheds for the Conterminous United States. Data are from the resource assessment. resource assessment.

Attribute

Description

10-Digit Hydrologic Unit Code 10-digit Hydrologic Unit Code - Watershed Identifier from Watershed Boundary Dataset.
Watershed Name Name of the 10-digit HUC watershed.
No. of Stream-Reaches Number of >1MW stream-reaches identified by the ORNL NSD assessment
Potential Capacity (MW) The HUC10-level Total Potential capacity from identified stream-reaches with capacity greater than 1MW
Avg. Critical Habitats Intersecting each Stream-Reach The average number of critical habitats intersecting a buffered area around stream reaches designated for potential hydropower development within each 10-HUC watershed. Critical habitats are lines or polygons designated by the US Fish and Wildlife Service for federally listed species under the Endangered Species Act of 1973. Buffer radii were 8000m for dams, 800m for inundated areas, and 800m for tailwaters.
No. Stream-Reaches Intersecting Critical Habitats The number of stream reaches designated for potential hydropower development whose buffered area intersected at least one critical habitat within each 10-HUC watershed. Critical habitats are lines or polygons designated by the US Fish and Wildlife Service for federally listed species under the Endangered Species Act of 1973. Buffer radii were 8000m for dams, 800m for inundated areas, and 800m for tailwaters.
Potential Capacity of Stream-Reaches Intersecting Critical Habitats The total megawattage capacity of stream reaches designated for potential developed whose buffered area intersected at least one critical habitat within each 10-HUC watershed . Critical habitats are lines or polygons designated by the US Fish and Wildlife Service for federally listed species under the Endangered Species Act of 1973. Buffer radii were 8000m for dams, 800m for inundated areas, and 800m for tailwaters.
No. of Federally Listed Fish Species The number of federally listed fish species potentially occurring within each 10-HUC Watershed. Federally listed fish included species whose entire population or subpopulation is listed as endangered, threatened, proposed for listing, or a species of concern according to the Endangered Species Act (1973) (Source: USFWS. Fish species distributions were available from NatureServe.
No. of IUCN Fish Species of Concern The number of fish species of concern potentially occurring within each 10-HUC Watershed. Fish species of concern were determined according to the International Union for the Conservation of Nature Red List Criteria. Fish species distributions were availabe from NatureServe at the 8-HUC watershed scale. IUCN rankings were obtained from NatureServe explorer (www.natureserve.org/explorer/).
No. of Potadromous Fish Species The number of fish species documented as potadromous within each 10-HUC Watershed. Potadromous fish are species migrating entirely in freshwater to complete their life cycle requirements. Fish species distributions were availabe from NatureServe at the 8-HUC watershed scale. Information on potadromy for fishes was obtained through the Fish Traits database. See also Frimpong, E.A. and P.L. Angermeier (2009), Fish Traits: A database of Ecological and Life-history traits of freshwater fishes of the United States, Fisheries, 34: 487-495.
No. of Stream-reaches Intersecting Protected Lands The number of stream reaches within each 10-HUC watershed designated for potential development whose buffered area intersected protected conservation lands. Protected conservation lands were obtained from the Protected Area Database, developed by the US Geological Survey Gap Analysis Program. Buffer radii were 2500m for dams, 800m for inundated areas, and 800m for tailwaters.
Potential Capacity (MW) of Stream-Reaches Intersecting Protected Lands The total megawattage capacity within each 10-HUC watershed of stream reaches designated for potential development whose buffered area intersected protected conservation lands. Protected conservation lands were obtained from the Protected Area Database, developed by the US Geological Survey Gap Analysis Program. Buffer radii were 2500m for dams, 800m for inundated areas, and 800m for tailwaters.
Land Owner Index The average Land Ownership Index of all stream reaches designated for potential development whose buffered area intersected protected conservation lands within each 10-HUC watershed. The Land Ownership Index is the sum of the number of different governmental or non-governmental entity lands that intersect each buffered area. Entities include federal, state, non-governmental agency, local government, Native American, regional agency, territorial, private conservation, joint ownership, and unknown agency. Thus, Land Ownership Index could range from 0 (no protected land intersecting a stream reach) to 10 (all entities have lands intersecting a stream reach). Protected conservation lands were obtained from the Protected Area Database, developed by the US Geological Survey Gap Analysis Program. Buffer radii were 2500m for dams, 800m for inundated areas, and 800m for tailwaters.
Land Designation Index The average Land Designation Index of all stream reaches designated for potential development whose buffered area intersected protected conservation lands within each 10-HUC watershed. The Land Ownership Index is the sum of the number of different land designations that intersect each buffered area. Land designations include US National Park, US National Forest/Grassland, National Trail, National Wildlife Refuge, National Natural Landmark, National Landscape Conservation System (Non Wilderness), National Landscape Conservation System (Wilderness), Wild and Scenic Rivers, Marine Protected Area, Wilderness Area, Historic/Cultural Area, Military Land, Habitat or Species Management Area, Research Natural Area, Local Conservation, Private Conservation, and Conservation Program Land. Thus, the Land Designation Index could range from 0 (no protected land intersecting a stream reach) to 17 (all designation types intersect a stream reach). Protected conservation lands were obtained from the Protected Area Database, developed by the US Geological Survey Gap Analysis Program. Buffer radii were 2500m for dams, 800m for inundated areas, and 800m for tailwaters.
No. of Stream-Reaches Intersecting US National Parks The number of stream reaches designated for potential development whose buffered area intersected a US National Park. US National Park lands were obtained from the Protected Area Database, developed by the US Geological Survey Gap Analysis Program. Buffer radii were 2500m for dams, 800m for inundated areas, and 800m for tailwaters.
Potential Capacity (MW) of Stream-Reaches Intersecting US National Parks The total megawattage capacity of stream reaches designated for potential development whose buffered area intersected a US National Park. US National Park lands were obtained from the Protected Area Database, developed by the US Geological Survey Gap Analysis Program. Buffer radii were 2500m for dams, 800m for inundated areas, and 800m for tailwaters.
No. of Stream-Reaches Intersecting Wild and Scenic Rivers The number of stream reaches designated for potential development whose buffered area intersected a Wild and Scenic River. Wild and Scenic River polylines were obtained from the National Wild and Scenic Rivers System website. Buffer radii were 2500m for dams, 800m for inundated areas, and 800m for tailwaters.
Potential Capacity (MW) of Stream-Reaches Intersecting Wild and Scenic Rivers The total megawattage capacity of stream reaches designated for potential development whose buffered area intersected a Wild and Scenic River. Wild and Scenic River polylines were obtained from the National Wild and Scenic Rivers System website. Buffer radii were 2500m for dams, 800m for inundated areas, and 800m for tailwaters.
Avg. No. of 303d Listed Waterbodies Intersecting each Stream-Reach The average number of 303d Listed waterbodies intersecting buffered areas around stream reaches designated for potential development within each 10-HUC watershed. Under the Clean Water Act (1977) Section 303(d), states are required to specify designated uses for all waterways (e.g., public water supply, protection of fish and wildlife, recreation). In addition, each state must identify and adopt water quality criteria that support each designated use category and determine a list of streams that are not meeting their designated uses (303d List). 303d waterbody listings were obtained from the U.S. EPA Impaired Waters and Total Maximum Daily Load website. Buffer radii were 500m for dams, 500m for inundated areas, and 500m for tailwaters.
No. of Stream-Reaches Intersecting 303d Listed Waterbodies The number of stream reaches designated for potential development whose buffered area intersected at least one 303d Listed waterbody within each 10-HUC watershed. Under the Clean Water Act (1977) Section 303(d), states are required to specify designated uses for all waterways (e.g., public water supply, protection of fish and wildlife, recreation). In addition, each state must identify and adopt water quality criteria that support each designated use category and determine a list of streams that are not meeting their designated uses (303d List). 303d waterbody listings were obtained from the U.S. EPA Impaired Waters and Total Maximum Daily Load website. Buffer radii were 500m for dams, 500m for inundated areas, and 500m for tailwaters.
Potential Capacity (MW) of 303d Waterbodies The total megawattage capacity of stream reaches designated for potential development whose buffered area intersected at least one 303d Listed waterbody within each 10-HUC watershed. Under the Clean Water Act (1977) Section 303(d), states are required to specify designated uses for all waterways (e.g., public water supply, protection of fish and wildlife, recreation). In addition, each state must identify and adopt water quality criteria that support each designated use category and determine a list of streams that are not meeting their designated uses (303d List). 303d waterbody listings were obtained from the U.S. EPA Impaired Waters and Total Maximum Daily Load website. Buffer radii were 500m for dams, 500m for inundated areas, and 500m for tailwaters.
Avg. No. of American Whitewater Boating Runs Intersecting Each Stream-Reach The average number of whitewater boating runs (launch/take-out point combinations) intersecting buffered areas around stream reaches designated for potential development within each 10-HUC watershed. Locations of whitewater boating runs were obtained from the American Whitewater National Whitewater Inventory. Buffer radii were 500m for dams, 500m for inundated areas, and 500m for tailwaters.
No. of Stream-Reaches Intersecting Whitewater Boating Runs The number of stream reaches designated for potential hydropower development whose buffered area intersected at least one whitewater boating run (launch/take-out point combination) within each 10-HUC watershed. Locations of whitewater boating runs were obtained from the American Whitewater National Whitewater Inventory. Buffer radii were 500m for dams, 500m for inundated areas, and 500m for tailwaters.
Potential Capacity (MW) of Stream-Reaches Intersecting Whitewater Boating Runs The total megawattage capacity of stream reaches designated for potential hydropower development whose buffered area intersected at least one whitewater boating run (launch/take-out point combination) within each 10-HUC watershed. Locations of whitewater boating runs were obtained from the American Whitewater National Whitewater Inventory. Buffer radii were 500m for dams, 500m for inundated areas, and 500m for tailwaters.
Avg. No. of Waterfalls Intersecting each Stream-Reach The average number of waterfalls per site which intersected buffered areas around stream reaches designated for potential development within each 10-HUC watershed. Locations of waterfalls were obtained from Geology.com. Buffer radii were 2500m for dams, 800m for inundated areas, and 800m for tailwaters.
No. of Stream-Reaches Intersecting Waterfalls The number of stream reaches designated for potential hydropower development whose buffered area intersected at least one waterfall within each 10-HUC watershed. Locations of waterfalls were obtained from Geology.com. Buffer radii were 2500m for dams, 800m for inundated areas, and 800m for tailwaters.
Potential Capacity (MW) of Stream-Reaches Intersecting Waterfalls The total megawattage capacity of stream reaches designated for potential hydropower development whose buffered area intersected at least one waterfall within each 10-HUC watershed. Locations of waterfalls were obtained from Geology.com. Buffer radii were 2500m for dams, 800m for inundated areas, and 800m for tailwaters.
Avg. No. of Boat Ramps Intersecting each Stream-Reach The average number of developed and undeveloped boat ramps intersecting buffered areas around stream reaches designated for potential development within each 10-HUC watershed. Locations of boat ramps were obtained from Delorme Publishing Company. Buffer radii were 500m for dams, 500m for inundated areas, and 500m for tailwaters.
No. of Stream-Reaches Intersecting Boat Ramps The number of stream reaches designated for potential hydropower development whose buffered area intersected at least one developed or undeveloped boat ramp within each 10-HUC watershed. Locations of boat ramps were obtained from Delorme Publishing Company. Buffer radii were 500m for dams, 500m for inundated areas, and 500m for tailwaters.
Potential Capacity (MW) of Stream-Reaches Intersecting Boat Ramps The total megawattage capacity of stream reaches designated for potential hydropower development whose buffered area intersected at least one developed and undeveloped boat ramps within each 10-HUC watershed. Locations of boat ramps were obtained from Delorme Publishing Company. Buffer radii were 500m for dams, 500m for inundated areas, and 500m for tailwaters.
Avg. No. of Fishing-Access Locations Intersecting each Stream-Reach The average number of fishing access locations intersecting buffered areas around stream reaches designated for potential development within each 10-HUC watershed. Boat ramp locations were obtained from Delorme Publishing Company. Buffer radii were 500m for dams, 500m for inundated areas, and 500m for tailwaters.
No. of Stream-Reaches Intersecting Fishing-Access Locations The number of stream reaches designated for potential hydropower development whose buffered area intersected at least one fishing access location within each 10-HUC watershed. Fishing access locations were obtained from Delorme Publishing Company. Buffer radii were 500m for dams, 500m for inundated areas, and 500m for tailwaters.
Potential Capacity (MW) of Stream-Reaches Intersecting Fishing-Access Locations The total megawattage capacity of stream reaches designated for potential hydropower development whose buffered area intersected at least one fishing access location within each 10-HUC watershed. Fishing access locations were obtained from Delorme Publishing Company. Buffer radii were 500m for dams, 500m for inundated areas, and 500m for tailwaters.
Surface Water Use (l/day/km^2) Estimated surface water use (liters day-1 km-2) within each 10-HUC watershed. Estimates of 2005 water use in the US were obtained from the US Geological Survey Water Use Data site. Estimates per 8-HUC watersheds were based on area-weighted averages from county estimates.
Ground Water Use (l/day/km^2) Estimated ground water use (liters day-1 km-2) within each 10-HUC watershed. Estimates of 2005 water use in the US were obtained from the US Geological Survey Water Use Data site. Estimates per 8-HUC watersheds were based on area-weighted averages from county estimates.
Urban Land Cover (NLCD) The percentage of area within each stream-reach watershed composed of low-intensity, moderate-intensity, and high-intensity urbanization averaged within each 10-HUC watershed. Urban landcover based on National Land Cover Database 2001 (Multi-Resolution Land Characteristics Consortium (MRLC): http://www.mrlc.gov /datasets) Urban land cover was available from the National Fish Habitat Action Plan dataset. % Landcover was summarized by National Hydrography Dataset Plus (NHDPlus) watersheds. NHDPlus watershed values for each stream-reach were aggregated by 10-HUC watershed and averaged.
Population Density (people/km^2) The estimated popluation density (individuals km-2) within each within each stream-reach watershed averaged across each 10-HUC watershed. Based on U.S. Population Density 2000 data from National Oceanic and Atmospheric Administration. Population density was available from the National Fish Habitat Action Plan dataset. Population density was summarized by National Hydrography Dataset Plus (NHDPlus) watersheds. NHDPlus watershed values for each stream-reach were aggregated by 10-HUC watershed and averaged.
No. of Dams within NHDPlus Catchments The number of dams occuring within all stream-reach watersheds totaled for each 10-HUC watershed. Dam locations were based on US Army Corps of Engineers National Dam Inventory. The number of dams per National Hydrography Dataset Plus (NHDPlus) catchment was available from the National Fish Habitat Action Plan dataset. NHDPlus watershed values for each stream-reach were aggregated by 10-HUC watershed and summed.
No. of Dams Upstream The number of dams occuring in the drainage network upstream of each stream-reach watershed averaged across each 10-HUC watershed. Dam locations based on US Army Corps of Engineers National Dam Inventory. The number of dams occuring in the entire upstream network per each National Hydrography Dataset Plus (NHDPlus) catchment was available from the National Fish Habitat Action Plan dataset. NHDPlus watershed values were aggregated by 10-HUC watershed and averaged.
Local Disturbance Index (NFHAP) The average Land Disturbance Index for stream-reach watersheds averaged across each 10-HUC watershed. Land Disturbance Indices were created for National Hydrography Dataset Plus (NHDPlus) catchments through the National Fish Habitat Action Plan dataset. A cumulative disturbance index was created for approximately 2.23 million U.S. river reaches (NHD flowlines) from landscape anthropogenic activities using urban areas, agricultural areas, roads, dams, mines, population density, and point-source pollution sites. Lower values indicate higher disturbance to aquatic habitats. NHDPlus watershed values from each local catchment surrounding stream-reaches were aggregated by 10-HUC watershed and averaged.




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Environmental Mitigation

HUC-02 Mitigation Summary Layer

Layer Summary: Summarizes environmental mitigation as required in the FERC license articles at each of the 447 hydropower plants sampled for the ORNL Environmental Mitigation project.
Two Digit Hydrologic Unit Code Identification Code for each 2-digit Hydrologic Unit
HUC2 Name Name for each 2-digit Hydrologic Unit
HUC2 Acres Acres per 2-digit Hydrologic Unit
HUC2 Square Kilometers Square kilometers per 2-digit Hydrologic Unit
HUC2 States States in each 2-digit Hydrologic Unit
Total hydropower plant count Total number of licensed non-federal hydropower plants
Hydropower Plant Count Number of hydropower plants in each HUC02 boundary included in the database
T1-Fish Passage Number of plants with mitigation classified as 'fish passage.'
T1-Hydrology Number of plants with mitigation classified as 'hydrology.'
T1-Water Quality Number of plants with mitigation classified as 'water quality.'
T1-Biodiversity Number of plants with mitigation classified as 'biodiversity.'
T1-Habitat Number of plants with mitigation classified as 'habitat.'
T1-Recreation Number of plants with mitigation classified as 'recreation.'
FP-Downstream Fish Passage Number of plants with mitigation classified as 'fish passage' AND 'downstream'
FP-Upstream Fish Passage Number of plants with mitigation classified as 'fish passage' AND 'upstream'
FP-Passage Planning Number of plants with mitigation classified as 'fish passage' AND 'passage planning.'
FP-Entrainment Number of plants with mitigation classified as 'fish passage' AND 'entrainment.'
HY-Flow Mitigation Number of plants with mitigation classified as 'hydrology' AND 'flow mitigation.'
HY-Tailrace Minimum Flow Number of plants with mitigation classified as 'hydrology' AND 'tailrace minimum flow.'
HY-Bypass Minimum Flow Number of plants with mitigation classified as 'hydrology' AND 'bypass minimum flow.'
HY-Sediment Number of plants with mitigation classified as 'hydrology' AND 'sediment.'
HY-Recreation Flow Number of plants with mitigation classified as 'hydrology' AND 'recreation flows.'
HY-Operations Number of plants with mitigation classified as 'hydrology' AND 'operations.'
WQ-Downstream Water Quality Number of plants with mitigation classified as 'water quality' AND 'downstream water quality.'
WQ-Upstream Water Quality Number of plants with mitigation classified as 'water quality' AND 'upstream water quality.'
BD-Terrestrial Number of plants with mitigation classified as 'biodiversity' AND 'terrestrial.'
BD-Aquatic Number of plants with mitigation classified as 'biodiversity' AND 'aquatic.'
HB-Fisheries Number of plants with mitigation classified as 'habitat' AND 'fisheries.'
HB-Riparian Number of plants with mitigation classified as 'habitat' AND 'riparian.'
HB-Reservoir Number of plants with mitigation classified as 'habitat' AND 'reservoir.'
HB-Wetlands Number of plants with mitigation classified as 'habitat' AND 'wetlands.'
RC-Resources and Mitigation Number of plants with mitigation classified as 'recreation' AND 'resources and mitigation.'
RC-Planning Number of plants with mitigation classified as 'recreation' AND 'planning.'




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HUC-02 Water Quality Summary Layer

Layer Summary: Summarizes water quality monitoring parameters as required in the FERC license articles at each of the 447 hydropower plants sampled for the ORNL Environmental Mitigation project.
Two Digit Hydrologic Unit Code Identification Code for each 2-digit Hydrologic Unit.
2-digit HUC code Identification Code for each 2-digit Hydrologic Unit.
2-digit HUC code Name for each 2-digit Hydrologic Unit.
HUC2 area acres Acres per 2-digit Hydrologic Unit.
HUC2 area acres Acres per 2-digit Hydrologic Unit.
HUC2 states States in each 2-digit Hydrologic Unit.
HUC2 states Total number of licensed non-federal hydropower plants.
Hydropower plant count Number of mitigation database hydropower plants per 2-digit Hydrologic Unit.
Hydropower plant count Number of plants required to monitor Dissolved Oxygen.
Temperature Number of plants required to monitor Temperature.
Temperature Number of plants required to monitor pH.
Total Dissolved Gases Number of plants required to monitor Total Dissolved Gases.
Total Dissolved Gases Number of plants required to monitor Discharge Flows.
Turbidity Number of plants required to monitor Turbidity.
Turbidity Number of plants required to monitor Intergravel Dissolved Oxygen.
Blue-Green Algae Number of plants required to monitor Blue-Green Algae.
Blue-Green Algae Number of plants required to monitor Fecal coliform.
Conductance Number of plants required to monitor Conductance.
Conductance Number of plants required to monitor Clarity.
Nitrogen Number of plants required to monitor Nitrogen.
Nitrogen Number of plants required to monitor Chlorophyll a.
Phosphorus Number of plants required to monitor Phosphorus.
Phosphorus Number of plants required to monitor Biomass.
Bacteria (unspecified) Number of plants required to monitor Bacteria (unspecified).
Bacteria (unspecified) Number of plants required to monitor Nutrients.
Alkalinity Number of plants required to monitor Alkalinity.
Alkalinity Number of plants required to monitor Total Suspended Solids.
Copper Number of plants required to monitor Copper.
Copper Number of plants required to monitor Hardness.
Total Iron Number of plants required to monitor Total Iron.
Total Iron Number of plants required to monitor Total Dissolved Solids.
Trace elements Number of plants required to monitor Trace elements.
Trace elements Number of plants required to monitor Metals.




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Environmental Attribution

Fish Traits Layer

Layer Summary: Summarize the spatial distribution of fish traits within 8-digit Hydrologic Unit Code Subbasins as part of the ORNL Environmental Attribution effort.

Attribute

Description

Subbasin Name Name for each 8-digit Hydrologic Unit.
Area (ac) Acreage per 8-digit Hydrologic Unit
Area (sq mi) Square miles per 8-digit Hydrologic Unit
08-Digit Hydrologic Unit Code Dominant representative state per 8-digit Hydrologic Unit
Total Fish Species The total number of fish species potentially occuring within each 8-HUC Watershed. Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset.
Native Fish Species The number of fish species native to North America potentially occuring within each 8-HUC Watershed. Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Information on native species status for fishes was obtained through the Fish Traits database. See also Frimpong, E.A. and P.L. Angermeier (2009), Fish Traits: A database of Ecological and Life-history traits of freshwater fishes of the United States, Fisheries, 34: 487-495.
Serial Spawning Fish Species The number of fish species documented as serial spawners within each 8-HUC Watershed. Serial spawning fish species (i.e. batch spawners) spawn multiple times per spawning season, as evidence of mulitple clutches or separate distinct batches of eggs at various stages of maturation. Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Fish trait information was obtained through the Fish Traits database. See also Frimpong, E.A. and P.L. Angermeier (2009), Fish Traits: A database of Ecological and Life-history traits of freshwater fishes of the United States, Fisheries, 34: 487-495.
Lotic Specialist/Serial Spawning Fish Species The number of fish species documented as serial spawners and preference for lotic habitats within each 8-HUC Watershed. Serial spawning fish species (i.e. batch spawners) spawn multiple times per spawning season, as evidence of mulitple clutches or separate distinct batches of eggs at various stages of maturation. Lotic specialist fish prefer habitats with moving water. Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Fish trait information was obtained through the Fish Traits database. See also Frimpong, E.A. and P.L. Angermeier (2009), Fish Traits: A database of Ecological and Life-history traits of freshwater fishes of the United States, Fisheries, 34: 487-495.
Fish Species with Temporally Restricted Spawning Seasons The number of fish species with temporally restricted spawning seasons potentially occuring within each 8-HUC Watershed. Species with temporally restricted spawning seasons (i.e., high spawning seasonality) were identified by species falling within the lowest tenth percentile spawning season duration (number of months) for all species. Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Fish trait information was obtained through the Fish Traits database. See also Frimpong, E.A. and P.L. Angermeier (2009), Fish Traits: A database of Ecological and Life-history traits of freshwater fishes of the United States, Fisheries, 34: 487-495.
Lotic Specialist/Temporally Restricted Spawning Fish Species The number of fish species with temporally restricted spawning seasons and preference for lotic habitats potentially occuring within each 8-HUC Watershed. Species with temporally restricted spawning seasons (i.e., high spawning seasonality) were identified by species falling within the lowest tenth percentile spawning season duration (number of months) for all species. Lotic specialist fish prefer habitats with moving water.Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Fish trait information was obtained through the Fish Traits database. See also Frimpong, E.A. and P.L. Angermeier (2009), Fish Traits: A database of Ecological and Life-history traits of freshwater fishes of the United States, Fisheries, 34: 487-495.
Habitat Specialist Fish Species The number of fish species considered habitat specialists potentially occuring within each 8-HUC Watershed. Habitat specialist scores were calculated by summing the number of habitats (substrates/waterbody types) and diet diversity characteristic of each species. Species with lower values were presumed to have more specific habitat needs. Habitat specialists were identified as those species having habitat specialist scores within the lowest tenth percentile of all species. Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Fish trait information was obtained through the Fish Traits database. See also Frimpong, E.A. and P.L. Angermeier (2009), Fish Traits: A database of Ecological and Life-history traits of freshwater fishes of the United States, Fisheries, 34: 487-495.
Lotic Specialist/Habitat Specialist Fish Species The number of fish species preferring lotic habitats potentially occuring within each 8-HUC Watershed. Lotic specialist fish prefer habitats with moving water. Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Fish trait information was obtained through the Fish Traits database. See also Frimpong, E.A. and P.L. Angermeier (2009), Fish Traits: A database of Ecological and Life-history traits of freshwater fishes of the United States, Fisheries, 34: 487-495.
Potadromous or Anadromous Fish Species The number of potadromous or anadromous fish species potentially occuring within each 8-HUC Watershed. Potadromous or anadromous were identified as exhibiting signficant movement related to spawning between marine and freshwater or within freshwater. Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Fish trait information was obtained through the Fish Traits database. See also Frimpong, E.A. and P.L. Angermeier (2009), Fish Traits: A database of Ecological and Life-history traits of freshwater fishes of the United States, Fisheries, 34: 487-495.
Lotic Fish Species The number of fish species preferring lotic habitats potentially occuring within each 8-HUC Watershed. Lotic specialist fish prefer habitats with moving water. Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Fish trait information was obtained through the Fish Traits database. See also Frimpong, E.A. and P.L. Angermeier (2009), Fish Traits: A database of Ecological and Life-history traits of freshwater fishes of the United States, Fisheries, 34: 487-495.
Lentic Fish Species The number of fish species preferring lentic habitats potentially occuring within each 8-HUC Watershed. Lentic fish species prefer habitats without moving water. Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Fish trait information was obtained through the Fish Traits database. See also Frimpong, E.A. and P.L. Angermeier (2009), Fish Traits: A database of Ecological and Life-history traits of freshwater fishes of the United States, Fisheries, 34: 487-495.




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Hydrologic Classification Layer

Layer Summary: Summarize the spatial distribution of hydrologic classes within 8-digit Hydrologic Unit Code Subbasins as part of the ORNL Environmental Attribution effort.

Attribute

Description

Subbasin Name Name for each 8-digit Hydrologic Unit.
08-Digit Hydrologic Unit Code Identification Code for each 8-digit Hydrologic Unit.
Area (ac) Acreage per 8-digit Hydrologic Unit
Area (sq mi) Square miles per 8-digit Hydrologic Unit
Dominant Hydrologic Class Name The dominant hydrologic class name represented within each 8-digit Hydrologic Unit. Hydrologic classes were created by McManamay et al. (2013) using discharge information from 2,618 USGS streamflow gages (Source: USGS National Water Information System). Hydrologic classes are groups of streams that share similar hydrologic properties, i.e. simliarity in streamflow characteristics, and may respond similarly to impoundment. Theisen polygons were created for each USGS, and each dominant hydrologic class was assigned to 8-digit Hydrologic units. For descriptions of hydrologic classes, see metadata description. For more information see: McManamay, R.A., M.S. Bevelhimer, S. Kao. 2013. A New US Hydrologic Classification: A Tool to Stratify Analyses in Ecohydrology. Ecohydrology (in revew).
Dominant Hydrologic Class Code The dominant hydrologic class code represented within each 8-digit Hydrologic Unit. Hydrologic classes were created by McManamay et al. (2013) using discharge information from 2,618 USGS streamflow gages (Source: USGS National Water Information System). Hydrologic classes are groups of streams that share similar hydrologic properties, i.e. simliarity in streamflow characteristics, and may respond similarly to impoundment. Theisen polygons were created for each USGS, and each dominant hydrologic class was assigned to 8-digit Hydrologic units. For descriptions of hydrologic classes, see metadata description. For more information see: McManamay, R.A., M.S. Bevelhimer, S. Kao. 2013. A New US Hydrologic Classification: A Tool to Stratify Analyses in Ecohydrology. Ecohydrology (in revew).
Secondary Hydrologic Class Name The dominant hydrologic class name represented within each 8-digit Hydrologic Unit. Hydrologic classes were created by McManamay et al. (2013) using discharge information from 2,618 USGS streamflow gages (Source: USGS National Water Information System). Hydrologic classes are groups of streams that share similar hydrologic properties, i.e. simliarity in streamflow characteristics, and may respond similarly to impoundment. Theisen polygons were created for each USGS, and each dominant hydrologic class was assigned to 8-digit Hydrologic units. For descriptions of hydrologic classes, see metadata description. For more information see: McManamay, R.A., M.S. Bevelhimer, S. Kao. 2013. A New US Hydrologic Classification: A Tool to Stratify Analyses in Ecohydrology. Ecohydrology (in revew).
Secondary Hydrologic Class Code The secondary hydrologic class code represented within each 8-digit Hydrologic Unit. Hydrologic classes were created by McManamay et al. (2013) using discharge information from 2,618 USGS streamflow gages (Source: USGS National Water Information System). Hydrologic classes are groups of streams that share similar hydrologic properties, i.e. simliarity in streamflow characteristics, and may respond similarly to impoundment. Theisen polygons were created for each USGS, and each dominant hydrologic class was assigned to 8-digit Hydrologic units. For descriptions of hydrologic classes, see metadata description. For more information see: McManamay, R.A., M.S. Bevelhimer, S. Kao. 2013. A New US Hydrologic Classification: A Tool to Stratify Analyses in Ecohydrology. Ecohydrology (in revew).
Number of Hydrologic Classes The total number of hydrologic classes represented within each 8-digit Hydrologic Unit. Hydrologic classes were created by McManamay et al. (2013) using discharge information from 2,618 USGS streamflow gages (Source: USGS National Water Information System). Hydrologic classes are groups of streams that share similar hydrologic properties, i.e. simliarity in streamflow characteristics, and may respond similarly to impoundment. Theisen polygons were created for each USGS, and each dominant hydrologic class was assigned to 8-digit Hydrologic units. For descriptions of hydrologic classes, see metadata description. For more information see: McManamay, R.A., M.S. Bevelhimer, S. Kao. 2013. A New US Hydrologic Classification: A Tool to Stratify Analyses in Ecohydrology. Ecohydrology (in revew).




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Federally Listed Fish Species Layer

Layer Summary: Summarize the spatial distribution of federally listed fish species within 8-digit Hydrologic Unit Code Subbasins as part of the ORNL Environmental Attribution effort.

Attribute

Description

Subbasin Name Name for each 8-digit Hydrologic Unit.
08-Digit Hydrologic Unit Code Identification Code for each 8-digit Hydrologic Unit.
Area (ac) Acreage per 8-digit Hydrologic Unit.
Area (sq mi) Square miles per 8-digit Hydrologic Unit.
No. of Fish Species under IUCN ranking The number of fish species ranked as "Critically endangered", "Endangered", "Vulnerable", "Near threatened" under the criteria developed by the International Union for the Conservation of Nature (IUCN). Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Information on IUCN criteria was obtained through Nature Serve Explorer. Descriptions of IUCN criteria are available from: IUCN (International Union for the Conservation of Nature) (2001), IUCN Red List categories and criteria: Version 3.1, IUCN Species Survival Commission, IUCN, Gland, Switzerland and Cambridge, UK.
No. of Fish Species Falling under ESA designation The total number of fish species (or their populations) recognized as listed, proposed, or candidate under the Endangered Species Act (1973). Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Information on listed status was obtained through Nature Serve Explorer.
No. of Candidate Fish Species under ESA The number of fish species listed as "Candidate" species under the Endangered Species Act (1973). Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Information on listed status was obtained through Nature Serve Explorer.
No. of Endangered Fish Species under ESA The number of fish species listed as "Endangered" under the Endangered Species Act (1973). Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Information on listed status was obtained through Nature Serve Explorer.
No. of Proposed Endangered Fish Species under ESA The number of fish species proposed as "Endangered" under the Endangered Species Act (1973). Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Information on listed status was obtained through Nature Serve Explorer.
No. of Fish Species with Populations as Candidates under ESA The number of fish species who have a poplulation (not entire species) proposed as a "Candidate" species under the Endangered Species Act (1973). Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Information on listed status was obtained through Nature Serve Explorer.
No. of Fish Species with Populations as Endangered under ESA The number of fish species who have a poplulation (not entire species) listed as "Endangered" under the Endangered Species Act (1973). Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Information on listed status was obtained through Nature Serve Explorer.
No. of Fish Species with Populations as Threatened under ESA The number of fish species who have a poplulation (not entire species) listed as "Threatened" under the Endangered Species Act (1973). Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Information on listed status was obtained through Nature Serve Explorer.
No. of Proposed Threatened Fish Species under ESA The number of fish species proposed as "Threatened" under the Endangered Species Act (1973). Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Information on listed status was obtained through Nature Serve Explorer.
No. of Fish Species of Concern under ESA The number of fish species listed as "Species of Concern" under the Endangered Species Act (1973). Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Information on listed status was obtained through Nature Serve Explorer.
No. of Threatened Fish Species under ESA The number of fish species listed as "Threatened" under the Endangered Species Act (1973). Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Information on listed status was obtained through Nature Serve Explorer.
No. of Endangered or Threatened Fish Species under ESA The number of fish species listed as "Endangered" or "Threatened" under the Endangered Species Act (1973). Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Information on listed status was obtained through Nature Serve Explorer.
No. of IUCN Critically Endangered Fish Species The number of fish species ranked as "Critically Endangered" under the criteria developed by the International Union for the Conservation of Nature (IUCN). Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Information on IUCN criteria was obtained through Nature Serve Explorer. Descriptions of IUCN criteria are available from: IUCN (International Union for the Conservation of Nature) (2001), IUCN Red List categories and criteria: Version 3.1, IUCN Species Survival Commission, IUCN, Gland, Switzerland and Cambridge, UK.
No. of IUCN Endangered Fish Species The number of fish species ranked as "Endangered" under the criteria developed by the International Union for the Conservation of Nature (IUCN). Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Information on IUCN criteria was obtained through Nature Serve Explorer. Descriptions of IUCN criteria are available from: IUCN (International Union for the Conservation of Nature) (2001), IUCN Red List categories and criteria: Version 3.1, IUCN Species Survival Commission, IUCN, Gland, Switzerland and Cambridge, UK.
No. of IUCN near Threatened Fish Species The number of fish species ranked as "Near Threatened" under the criteria developed by the International Union for the Conservation of Nature (IUCN). Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Information on IUCN criteria was obtained through Nature Serve Explorer. Descriptions of IUCN criteria are available from: IUCN (International Union for the Conservation of Nature) (2001), IUCN Red List categories and criteria: Version 3.1, IUCN Species Survival Commission, IUCN, Gland, Switzerland and Cambridge, UK.
No. of IUCN Vulnerable Fish Species The number of fish species ranked as "Vulnerable" under the criteria developed by the International Union for the Conservation of Nature (IUCN). Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset. Information on IUCN criteria was obtained through Nature Serve Explorer. Descriptions of IUCN criteria are available from: IUCN (International Union for the Conservation of Nature) (2001), IUCN Red List categories and criteria: Version 3.1, IUCN Species Survival Commission, IUCN, Gland, Switzerland and Cambridge, UK.
Total Fish Species The total number of fish species potentially occuring within each 8-HUC Watershed. Fish species distributions were available from NatureServe within 8-digit hydrologic unit codes from the HUC250K version of watershed boundaries. Fish species were resummarized into 8-digit HUC boundaries within the Watershed Boundary Dataset.




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Water Use Layer

Layer Summary: Summarize the spatial distribution of water use within 8-digit Hydrologic Unit Code Subbasins as part of the ORNL Environmental Attribution effort.

Attribute

Description

Subbasin Name Name for each 8-digit Hydrologic Unit.
08-Digit Hydrologic Unit Code Identification Code for each 8-digit Hydrologic Unit.
Area (ac) Acreage per 8-digit Hydrologic Unit.
Area (sq mi) Square miles per 8-digit Hydrologic Unit.
Aquaculture Water Use (l/day/km^2) Average aquaculture surface water use (liters day-1 km-2) per 8-digit hydrologic unit. Water use estimates (2005) per county were obtained from USGS: Kenny, J.F., Barber, N.L., Hutson, S.S., Linsey, K.S., Lovelace, J.K., and Maupin, M.A., 2009, Estimated use of water in the United States in 2005: U.S. Geological Survey Circular 1344, p. 52. County level shapefiles and population density was obtained through the US Census Bureau. Water use was summarized by 8-digit Hydrologic unit codes using area-weighted averages of county-level data.
Domestic Water Use (l/day/km^2) Average domestic surface water use (liters day-1 km-2) per 8-digit hydrologic unit. Water use estimates (2005) per county were obtained from Kenny, J.F., Barber, N.L., Hutson, S.S., Linsey, K.S., Lovelace, J.K., and Maupin, M.A., 2009, Estimated use of water in the United States in 2005: U.S. Geological Survey Circular 1344, p. 52. County level shapefiles and population density was obtained through the US Census Bureau. Water use was summarized by 8-digit Hydrologic unit codes using area-weighted averages of county-level data.
Total Ground Water Use (l/day/km^2) Average total ground water use (liters day-1 km-2) per 8-digit hydrologic unit. Water use estimates (2005) per county were obtained from Kenny, J.F., Barber, N.L., Hutson, S.S., Linsey, K.S., Lovelace, J.K., and Maupin, M.A., 2009, Estimated use of water in the United States in 2005: U.S. Geological Survey Circular 1344, p. 52.. County level shapefiles and population density was obtained through the US Census Bureau. Water use was summarized by 8-digit Hydrologic unit codes using area-weighted averages of county-level data.
House Density (Houses/km^2) Average housing density (houses per km^2) within each 8-digit hydrologic unit. County level shapefiles and population density was obtained through the US Census Bureau. Housing density was summarized by 8-digit Hydrologic unit codes using area-weighted averages of county-level data.
Industrial Water Use (l/day/km^2) Average industrial surface water use (liters day-1 km-2) per 8-digit hydrologic unit. Water use estimates (2005) per county were obtained from Kenny, J.F., Barber, N.L., Hutson, S.S., Linsey, K.S., Lovelace, J.K., and Maupin, M.A., 2009, Estimated use of water in the United States in 2005: U.S. Geological Survey Circular 1344, p. 52.. County level shapefiles and population density was obtained through the US Census Bureau. Water use was summarized by 8-digit Hydrologic unit codes using area-weighted averages of county-level data.
Irrigation Water Use (l/day/km^2) Average irrigation surface water use (liters day-1 km-2) per 8-digit hydrologic unit. Water use estimates (2005) per county were obtained from Kenny, J.F., Barber, N.L., Hutson, S.S., Linsey, K.S., Lovelace, J.K., and Maupin, M.A., 2009, Estimated use of water in the United States in 2005: U.S. Geological Survey Circular 1344, p. 52.. County level shapefiles and population density was obtained through the US Census Bureau. Water use was summarized by 8-digit Hydrologic unit codes using area-weighted averages of county-level data.
Livestock Water Use (l/day/km^2) Average livestock surface water use (liters day-1 km-2) per 8-digit hydrologic unit. Water use estimates (2005) per county were obtained from Kenny, J.F., Barber, N.L., Hutson, S.S., Linsey, K.S., Lovelace, J.K., and Maupin, M.A., 2009, Estimated use of water in the United States in 2005: U.S. Geological Survey Circular 1344, p. 52.. County level shapefiles and population density was obtained through the US Census Bureau. Water use was summarized by 8-digit Hydrologic unit codes using area-weighted averages of county-level data.
Mining Water Use (l/day/km^2) Average mining operations surface water use (liters day-1 km-2) per 8-digit hydrologic unit. Water use estimates (2005) per county were obtained from Kenny, J.F., Barber, N.L., Hutson, S.S., Linsey, K.S., Lovelace, J.K., and Maupin, M.A., 2009, Estimated use of water in the United States in 2005: U.S. Geological Survey Circular 1344, p. 52.. County level shapefiles and population density was obtained through the US Census Bureau. Water use was summarized by 8-digit Hydrologic unit codes using area-weighted averages of county-level data.
Potential Evapotranspiration (in) Average potential evapotranspiration (inches) within each 8-digit hydrologic unit. PET per 12-digit HUC was obtained from Wollock, D. (2003) Hydrologic landscape regions of the United States, US Geological Survey Open-File Report 03-145, Reston, VA.. Precipitation was summarized by aggregating 12-digit hydrologic units into 8-digit hydrologic units.
Population Density (Individuals/km^2) Average population density (individuals per km^2) within each 8-digit hydrologic unit. County level shapefiles and population density was obtained through the US Census Bureau. Popluation density was summarized by 8-digit Hydrologic unit codes using area-weighted averages of county-level data.
Precipitation (in) Average precipitation (inches) within each 8-digit hydrologic unit. Precipitation per 12-digit HUC was obtained from Wollock, D. (2003) Hydrologic landscape regions of the United States, US Geological Survey Open-File Report 03-145, Reston, VA.. Precipitation was summarized by aggregating 12-digit hydrologic units into 8-digit hydrologic units.
Public Water Use (l/day/km^2) Average public surface water use (liters day-1 km-2) per 8-digit hydrologic unit. Water use estimates (2005) per county were obtained from Kenny, J.F., Barber, N.L., Hutson, S.S., Linsey, K.S., Lovelace, J.K., and Maupin, M.A., 2009, Estimated use of water in the United States in 2005: U.S. Geological Survey Circular 1344, p. 52.. County level shapefiles and population density was obtained through the US Census Bureau. Water use was summarized by 8-digit Hydrologic unit codes using area-weighted averages of county-level data.
Total Surface Water Use (l/day/km^2) Average total surface water use (liters day-1 km-2) per 8-digit hydrologic unit. Water use estimates (2005) per county were obtained from Kenny, J.F., Barber, N.L., Hutson, S.S., Linsey, K.S., Lovelace, J.K., and Maupin, M.A., 2009, Estimated use of water in the United States in 2005: U.S. Geological Survey Circular 1344, p. 52.. County level shapefiles and population density was obtained through the US Census Bureau. Water use was summarized by 8-digit Hydrologic unit codes using area-weighted averages of county-level data.
Thermoelectric Water Use (l/day/km^2) Average thermoelectric surface water use (liters day-1 km-2) per 8-digit hydrologic unit. Water use estimates (2005) per county were obtained from Kenny, J.F., Barber, N.L., Hutson, S.S., Linsey, K.S., Lovelace, J.K., and Maupin, M.A., 2009, Estimated use of water in the United States in 2005: U.S. Geological Survey Circular 1344, p. 52.. County level shapefiles and population density was obtained through the US Census Bureau. Water use was summarized by 8-digit Hydrologic unit codes using area-weighted averages of county-level data.
Total Freshwater Use (l/day/km^2) Average total freshwater (surface and groundwater) use (liters day-1 km-2) per 8-digit hydrologic unit. Water use estimates (2005) per county were obtained from Kenny, J.F., Barber, N.L., Hutson, S.S., Linsey, K.S., Lovelace, J.K., and Maupin, M.A., 2009, Estimated use of water in the United States in 2005: U.S. Geological Survey Circular 1344, p. 52.. County level shapefiles and population density was obtained through the US Census Bureau. Water use was summarized by 8-digit Hydrologic unit codes using area-weighted averages of county-level data.




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Hydrology

USGS Gauge Station Layer

Layer Summary: Hydrology reference layer.

Attribute

Description

Station Name Name of the gauge station.
Site Number Site identification number for the gauge station.
Altitude Datum Code Altitude datum identification code for the gauge station.
08-Digit Hydrologic Unit Code 08-digit hydrologic unit code of the subbasin that the gauge station is within.
Year Initiated The starting year of observation.
Year Ended The ending year observation.
Altitude (m) Gauge altitude in meter
Drainage Area (mi^2) Total upstream drainage area in square mile.
Contributing Drainage Area (mi^2) Total upstream contributing drainage area in square miles (i.e., excluding all closed basins upstream).




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NHDPlus Flowline Layer

Layer Summary: Hydrology reference layer.

Attribute

Description

ComID Common identifier of an NHD Flowline. See NHDPlus v1 documentation for further details (http://www.horizon-systems.com/NHDPlus/NHDPlusV1_documentation.php).
Feature Name Name of the NHDPlus Flowline feature (“GNIS_Name” field from NHDPlus) from NHDPlus v1 (http://www.horizon-systems.com/NHDPlus/NHDPlusV1_documentation.php).
NHD Feature Type “Artificial Path”, “CanalDitch”, “Connector”, “Pipeline”, “StreamRiver”. Categories are from NHDPlus v1 (http://www.horizon-systems.com/NHDPlus/NHDPlusV1_documentation.php).
Mean Annual Flow (cfs) – Unit Runoff Method Mean annual flow (cfs) at the bottom of the Flowline as computed by the Unit Runoff Method. “MAFlowU” field in NHDPlus v1 (http://www.horizon-systems.com/NHDPlus/NHDPlusV1_documentation.php).
Mean Annual Flow (cfs) – Vogel Method Mean annual flow (cfs) at the bottom of the Flowline as computed by the Vogel Method. “MAFlowV” field in NHDPlus v1 (http://www.horizon-systems.com/NHDPlus/NHDPlusV1_documentation.php).
Reach Length (km) The length of each individual reach feature in kilometers.
Cumulative Drainage Area (sq km) The cumulative drainage area (sq km) to the bottom of each Flowline. NHDPlus v1 “CumDrainag” field (http://www.horizon-systems.com/NHDPlus/NHDPlusV1_documentation.php).




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Watershed Boundary Dataset

Region (HUC-02) Layer

Layer Summary: Watershed Boundary Dataset reference layer.

Attribute

Description

Region Name Name for each 02-digit Hydrologic Unit.
02-Digit Hydrologic Unit Code Identification Code for each 02-digit Hydrologic Unit.




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Subregion (HUC-04) Layer

Layer Summary: Watershed Boundary Dataset reference layer.

Attribute

Description

Subregion Name Name for each 04-digit Hydrologic Unit.
04-Digit Hydrologic Unit Code Identification Code for each 04-digit Hydrologic Unit.
Area (ac) Area of the subregion in acres.




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Basin (HUC-06) Layer

Layer Summary: Watershed Boundary Dataset reference layer.

Attribute

Description

Basin Name Name for each 06-digit Hydrologic Unit.
06-Digit Hydrologic Unit Code Identification Code for each 06-digit Hydrologic Unit.
Area (ac) Area of the basin in acres.




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Subbasin (HUC-08) Layer

Layer Summary: Watershed Boundary Dataset reference layer.

Attribute

Description

Subbasin Name Name for each 08-digit Hydrologic Unit.
08-Digit Hydrologic Unit Code Identification Code for each 08-digit Hydrologic Unit.
Area (ac) Area of the subbasin in acres.




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Watershed (HUC-10) Layer

Layer Summary: Watershed Boundary Dataset reference layer.

Attribute

Description

Watershed Name Name for each 10-digit Hydrologic Unit.
10-Digit Hydrologic Unit Code Identification Code for each 10-digit Hydrologic Unit.
Area (ac) Area of the watershed in acres.