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Geospatial data, such as remote sensing images and map based information, provide an opportunity to evaluate hydrologic systems with a spatially continuous data set.
WaterWatch is a U.S. Geological Survey (USGS) World Wide Web site that displays maps, graphs, and tables describing real-time, recent, and past streamflow conditions for the United States.
StreamStats is a Web-based geographic information system (GIS) application created by the USGS to provide users with access to an assortment of data and analytical tools. StreamStats provides streamflow and basin characteristics for USGS sites.