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#1 Federal

1:1,000,000-scale Hydrographic Areas of the Great Basin

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set consists of hydrographic area and major flow system boundaries and polygons delineated at 1:1,000,000-scale for the Great Basin.

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Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: August 01, 2026 at 05:56 AM

#2 Federal

1:1,000,000-scale hydrographic areas and flow systems for the Great Basin carbonate and alluvial aquifer system of Nevada, Utah, and parts of adjacent states

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This dataset was created in support of a U.S. Geological Survey (USGS) study focusing on groundwater resources in the Great Basin carbonate and alluvial aquifer system (GBCAAS). The GBCAAS is a...

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Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: August 01, 2026 at 03:35 AM

#3 Federal

Location of General Head Boundaries (GHB) in the Central Valley Hydrologic Model (CVHM)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This digital dataset represents the area where lateral flow into and out of the Central Valley groundwater-flow system occurs. The General Head Boundary (GHB) is set to 0 and is only in the Delta...

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Search relevance: 1.00 | Views last month: 1 | Catalog Last Checked: August 03, 2026 at 03:21 PM

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1:1,000,000-scale Hydrographic Areas of the Great Basin

1:1,000,000-scale hydrographic areas and flow systems for the Great Basin carbonate and alluvial aquifer system of Nevada, Utah, and parts of adjacent states

Location of General Head Boundaries (GHB) in the Central Valley Hydrologic Model (CVHM)