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USGS · 70039553

State hydrologic unit maps

Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
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Abstract

A series of uniform, nationally consistent State Hydrologic Unit Maps that accurately delineate the hydrographic boundaries of major U.S. river basins has been prepared by the U.S. Geological Survey in cooperation with the U.S. Water Resources Council. These maps provide a standardized base for use by Federal and State water resources agencies throughout the country.

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Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey. 1987. State hydrologic unit maps. https://doi.org/10.3133/70039553

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