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  1. Watersheds and Drainage Basins | U.S. Geological Survey

    Watersheds of North America are large drainage basins which drain to separate oceans, seas, gulfs, or endorheic basins. There are six gene…
    Watersheds of North America are large drainage basins which drain to separate oceans, seas, gulfs, or endorheic basins. There are six generally recognized hydrological continental divides which divide the continent into seven principal drainage basins spanning three oceans and one endorheic basin. The basins are the Atlanti…
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  1. The United States has five major drainage basins12:
    • The Atlantic Seaboard basin in eastern North America drains to the Atlantic Ocean.
    • The Great Lakes-St. Lawrence basin in central and eastern North America drains to the Gulf of St. Lawrence on the Atlantic Ocean or to the Labrador Sea.
    • The Gulf of Mexico basin in the southern United States drains to the Gulf of Mexico, a basin of the Atlantic Ocean.
    • The Pacific basin in western North America drains to the Pacific Ocean or the Gulf of California on the Pacific Ocean.
    • The Arctic basin in northwestern North America drains to the Beaufort Sea of the Arctic Ocean or directly to the Arctic Ocean.
    • The Hudson Bay basin in central northern North America drains to Hudson Bay on the Labrador Sea (which may be considered part of either the Arctic Ocean or Atlantic Ocean), or to the Arctic Sea via Foxe Basin and Fury and Hecla Strait.
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    The Atlantic Seaboard basin in eastern North America drains to the Atlantic Ocean; the Great Lakes-St. Lawrence basin in central and eastern North America drains to the Gulf of St. Lawrence on the Atlantic Ocean or to the Labrador Sea; the Gulf of Mexico basin in the southern United States drains to the Gulf of Mexico, a basin of the Atlantic Ocean; the Pacific basin in western North America drains to the Pacific Ocean or the...

    en.wikipedia.org/wiki/Watersheds_of_North_America
    The 5 major watersheds in the United States are the Lawrence basin, the Pacific basin, the Arctic basin, the Hudson Bay basin, and the Great Basin. These principal basins span the continent, with the exception of numerous smaller endorheic basins.
    www.ncesc.com/geographic-faq/how-many-basins …
     
  2. Watersheds of North America - Wikipedia

    Watersheds of North America are large drainage basins which drain to separate oceans, seas, gulfs, or endorheic basins. There are six generally recognized hydrological continental divides which divide the continent into seven principal …

     
  3. Watershed Map of North America | U.S. Geological …

    Apr 10, 2019 · This map shows one set of watershed boundaries in the continental United States; these are known as National hydrologic units (watersheds). Find out more: Watersheds and drainage basins; Lakes; …

  4. U.S. River Basins | Geographical Reference Maps | National …

  5. List of drainage basins by area - Wikipedia

    318 rows · The list of drainage basins by area identifies basins (also known as …

  6. List of river basins in the United States - Wikipedia

  7. Hydrologic Units of the United States - water.usgs.gov

  8. USGS Watershed Boundaries - ArcGIS

    Feb 19, 2020 · This United States Geological Survey web map displays the National Watershed Boundary Dataset. Web Map by esri_basemaps

  9. Drainage Basin - Education

    Jul 19, 2024 · Runoff water from a large watershed in the mid continental United States drains into the Gulf of Mexico through the Mississippi River system. The Amazon River watershed is huge, draining over a third of the entire South …

  10. Hydrologic unit maps | U.S. Geological Survey - USGS.gov

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