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The water-quality data include highway-runoff-quality statistics, upstream-water-quality statistics, downstream-water-quality definitions, and BMP-performance statistics. There also is a GUI form for running the model and accessing the distinct set of output files.
Using the basic water features, flow network, linked information, and other characteristics, it is possible to study cause and effect relationships, such as how a source of poor water quality upstream might affect a fish population downstream. The NHD is part of the United States Geological Survey The National Map for the United States.
USGS operates a number of water-related programs, notably the National Streamflow Information Program [23] and National Water-Quality Assessment Program. [24] USGS Water data is publicly available from their National Water Information System [25] database.
Water quality modeling also helps determine correlations to constituent sources and water quality along with identifying information gaps. [2] Due to the increase in freshwater usage among people, water quality modeling is especially relevant [3] both in a local level and global level. In order to understand and predict the changes over time in ...
National Water Quality Assessment Data Warehouse: Large amounts of georeferenced data about water quality. Includes ground and surfacewater sampling data, discharges and health information. OpenTopography: OpenTopography facilitates community access to high-resolution, Earth science-oriented, topography data, and related tools and resources.
This is a list of rivers in the continental United States by average discharge (streamflow) in cubic feet per second. All rivers with average discharge more than 15,000 cubic feet per second are listed.
Within the USGS, the Water Resources Division carries the responsibility for monitoring water resources. To establish a stream gauge, USGS personnel first choose a site on a stream where the geometry is relatively stable and there is a suitable location to make discrete direct measurements of streamflow using specialized equipment.
Additionally, USGS uses hydrographs to study streamflow in rivers. A hydrograph is a chart showing, most often, river stage (height of the water above an arbitrary altitude) and streamflow (amount of water, usually in cubic feet per second). Other properties, such as rainfall and water quality parameters can also be plotted. [9]