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Even in the computer era, manual watershed delineation is still a useful skill, in order to check whether watersheds generated with software are correct. [1] Instructions for manual watershed delineation can be found in some textbooks in geography or environmental management, in government pamphlets, [4] [5] or in online video tutorials. [6]
Determining the boundary of wetland, whether jurisdictional under sections 404 or 10, or not jurisdictional but still meeting the technical definition of a wetland, that is having the soils, vegetation and hydrology criterion met is called a "wetland delineation", and generally is performed by college graduates with natural science or biology ...
Wade Hurt taught hydric soils classes [5] for soil science undergraduate and graduate students as well as environmental professionals. Classes teach theoretical, morphologic, and regulatory criteria used for delineating wetlands, siting septic drain fields, and identifying seasonal high water table elevation.
Environmental Laboratory. 1987. Corps of Engineers Wetland Delineation Manual, Technical Report Y-87-1, U.S. Army Engineer Waterways Experiment Station, Vicksburg, Miss. Url last accessed 2006-04-16; Soil Conservation Service. 1994. National Food Security Act Manual. Title 180. USDA Soil Conservation Service, Washington, D.C.
The wetland status of 7,000 plants is determined upon information contained in a list compiled in the National Wetland Inventory undertaken by the U.S. Fish and Wildlife Service and developed in cooperation with a federal inter-agency review panel (Reed, 1988). The National List was compiled in 1988 with subsequent revisions in 1996 and 1998.
"No Net loss" is the United States government's overall policy goal regarding wetlands preservation. The goal of the policy is to balance wetland loss due to economic development with wetlands reclamation, mitigation, and restorations efforts, so that the total acreage of wetlands in the country does not decrease, but remains constant or increases.
GIS users can access wetlands data through an online wetland mapping service or download data for various applications (maps, data analyses, and reports). The techniques used by NWI have recently been adopted by the Federal Geographic Data Committee as the federal wetland mapping standard (FGDC Wetlands Subcommittee 2009).
The system includes five main types of wetlands: Marine wetlands- which are areas exposed to the open ocean; Estuarine wetlands- partially enclosed by land and also exposed to a mixture of fresh and salt water bodies of water; Riverine wetlands- associated with flowing water; Lacustrine wetlands- associated with a lake or other body of fresh water