-
Federal
National Hydrography Dataset (NHD) - USGS National Map Downloadable Data Collection NGDA 66 recent views
Department of the Interior —
The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's... -
Federal
National Hydrography Dataset Plus High Resolution (NHDPlus HR) - USGS National Map Downloadable Data Collection
Department of the Interior —
The High Resolution National Hydrography Dataset Plus (NHDPlus HR) is an integrated datset of geospatial data layers, including the most current National Hydrography... -
Federal
Hydrology and climate elements on the Rio Grande/Bravo basin
Department of the Interior —
This is one of five general categories that contain the water related elements of the Rio Grande/Bravo basin. This category includes some of hydrologic and climatic... -
Federal
Watershed Boundaries for the U.S. Geological Survey Regional Stream Quality Assessment
Department of the Interior —
In 2013, the Regional Stream Quality Assessment (RSQA) study was started as part of the U.S. Geological Survey (USGS) National Water Quality Assessment (NAWQA)... -
Federal
Watershed Boundary Dataset; 12-Digit Watersheds Dissolved to 8-Digit Watersheds
Department of the Interior —
This dataset is the digital hydrologic unit boundary layer for the 8-digit subwatershed boundaries for the conterminous United States. This dataset is intended to be... -
Federal
Watershed Boundaries for the U.S. Geological Survey Southeast Stream Quality Assessment
Department of the Interior —
In 2015, the second of several Regional Stream Quality Assessments (RSQA) was done in the southeastern United States. The Southeast Stream Quality Assessment (SESQA)... -
Federal
Hydrology and climate elements on the Rio Grande/Bravo basin
Department of the Interior —
This is one of five general categories that contain the water related elements of the Rio Grande/Bravo basin. This category includes some of hydrologic and climatic... -
Federal
Watershed Boundaries for the U.S. Geological Survey Midwest Stream Quality Assessment
Department of the Interior —
In 2013, the first of several Regional Stream Quality Assessments (RSQA) was done in the Midwest United States. The Midwest Stream Quality Assessment (MSQA) was a...