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State hydrologic unit maps
General Information Product
By: Water Resources Division, U.S. Geological Survey
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.
Suggested Citation
Water Resources Division, U.S. Geological Survey, 1987, State hydrologic unit maps: General Information Product, 7 p.; col. ill.; maps. (col.), https://doi.org/10.3133/70039553.