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  2. Hydrologic unit system (United States) - Wikipedia

    en.wikipedia.org/wiki/Hydrologic_unit_system...

    The 10-digit watersheds were delineated to be between 40,000 and 250,000 acres in size, and the 12-digit subwatersheds between 10,000 and 40,000 acres. [5] In addition to the hydrologic unit codes, each hydrologic unit was assigned a name corresponding to the unit's principal hydrologic feature or to a cultural or political feature within the ...

  3. Hydrological code - Wikipedia

    en.wikipedia.org/wiki/Hydrological_code

    A hydrological code or hydrologic unit code is a sequence of numbers or letters (a geocode) that identify a hydrological unit or feature, such as a river, river reach, lake, or area like a drainage basin (also called watershed in North America) or catchment.

  4. Great Lakes water resource region - Wikipedia

    en.wikipedia.org/wiki/Great_Lakes_Water_Resource...

    The Great Lakes region, which is listed with a 2-digit hydrologic unit code (HUC) of 04, has an approximate size of 141,984 square miles (367,740 square kilometers), and consists of 15 subregions, which are designated with the 4-digit HUCs 0401 through 0415.

  5. New England water resource region - Wikipedia

    en.wikipedia.org/wiki/New_England_Water_Resource...

    Basin size 73,753 sq mi (191,020 km 2 ) The New England water resource region is one of 21 major geographic areas, or regions , in the first level of classification used by the United States Geological Survey to divide and sub-divide the United States into successively smaller hydrologic units .

  6. List of Great Basin watersheds - Wikipedia

    en.wikipedia.org/wiki/List_of_Great_Basin_watersheds

    Map of the Great Basin. The Great Basin is the largest region of contiguous endorheic drainage basins in North America, and is encompassed by the Great Basin Divide.This is a list of the drainage basins in the Great Basin that are over 500 sq mi (1,300 km 2), listed by the state containing most of the basin.

  7. Minnehaha Creek Watershed District - Wikipedia

    en.wikipedia.org/wiki/Minnehaha_Creek_Watershed...

    The Minnehaha Creek Watershed District is a watershed district in Minnesota with a mission to collaborate with public and private partners to protect and improve land and water for current and future generations. [1]

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