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  2. Hydrologic unit system (United States) - Wikipedia

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

    The newer delineation work on watersheds and subwatersheds was done using 1:24,000 scale maps and data. As a result, the subbasin boundaries were changed and adjusted in order to conform to the higher resolution watersheds within them. Changes to subbasin boundaries resulted in changes in area sizes.

  3. Hydrological code - Wikipedia

    en.wikipedia.org/wiki/Hydrological_code

    Subsequently every watershed along this coast is assigned a number using the Pfafstetter Coding System. This implies that the four largest watersheds are selected and receive numbers 2,4,6, or 8. The watersheds in between the large systems receive numbers 3, 5, and 7. Numbers 1 and 9 are used for the small watersheds on the edges of the strait.

  4. Watershed delineation - Wikipedia

    en.wikipedia.org/wiki/Watershed_delineation

    Watershed delineation is the process of identifying the boundary of a watershed, also referred to as a catchment, drainage basin, or river basin.It is an important step in many areas of environmental science, engineering, and management, for example to study flooding, aquatic habitat, or water pollution.

  5. Great Lakes Basin - Wikipedia

    en.wikipedia.org/wiki/Great_Lakes_Basin

    Quebec, a portion of whose lands drain into the St. Lawrence Basin, is a signatory to the Great Lakes Charter of 1985, the 2001 Charter Annex, and the Agreements of 2005. [2]

  6. Subbasin - Wikipedia

    en.wikipedia.org/wiki/Subbasin

    A subbasin or sub-basin is a structural geologic feature where a larger basin is divided into a series of smaller basins with intervening intrabasinal highs.

  7. List of drainage basins by area - Wikipedia

    en.wikipedia.org/wiki/List_of_drainage_basins_by...

    For example, the Antarctic ice sheet can be divided into basins, [1] and most of Libya is included in the Mediterranean Sea basin even though almost no water from the interior actually reaches the sea.

  8. Groundwater pumping is causing land to sink at record rate in ...

    www.aol.com/news/groundwater-pumping-causing...

    Groundwater pumping has been causing the land to sink at a record pace in California's San Joaquin Valley. New research suggests ways of addressing the problem.

  9. List of watershed topics - Wikipedia

    en.wikipedia.org/wiki/List_of_watershed_topics

    Watershed management, the management of drainage basins; Watershed Protection and Flood Prevention Act, a United States law controlling drainage and water storage; Watershed district (Minnesota), one of a number of government entities in the US state of Minnesota which monitor and regulate the use of water in drainage basins