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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.
The latest update notes and new features can be found on the EPA website in the download section. [10] Recently added in November 2015 were the EPA SWMM 5.1 Hydrology Manual (Volume I) [11] and in 2016 the EPA SWMM 5.1 Hydraulic Manual (Volume II) [12] and EPA SWMM 5.1 Water Quality (including LID Modules) Volume (III) [13] + Errata. [14]
The Environmental Protection Agency (EPA) is an independent agency of the United States government tasked with environmental protection matters. [2] President Richard Nixon proposed the establishment of EPA on July 9, 1970; it began operation on December 2, 1970, after Nixon signed an executive order. [3]
The EPA established the hypoxia task force in the late 1990s to reduce nutrient pollution and shrink the dead zone, but it relies on voluntary efforts to reduce farm runoff and hasn't ...
This image shows the basic principle which leads to determination of the time of concentration. Much like a topographic map showing lines of equal elevation, a map with isolines can be constructed to show locations with the same travel time to the watershed outlet. In this simplified example, the watershed outlet is located at the bottom of the ...
Similar files can be downloaded for a given year's eGRID release from EPA's eGRID website. eGRID Subregions, 2019 The primary data sources used for eGRID include data reported by electric generators to EPA’s Clean Air Markets Division (pursuant to 40 CFR Part 75) and to the U.S. Energy Information Administration (EIA).
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Map showing locations of 28 NURP projects. The Nationwide Urban Runoff Program (NURP) was a research project conducted by the United States Environmental Protection Agency (EPA) between 1979 and 1983. It was the first comprehensive study of urban stormwater pollution across the United States. [1]