Scott A. Hoffman

Pennsylvania StreamStats--A web-based application for obtaining water-resource-related information

StreamStats is a national web-based Geographic Information System (GIS) application, developed by the U.S. Geological Survey (USGS), in cooperation with Environmental Systems Research Institute, Inc., to provide a variety of water-resourcerelated information. Users can easily obtain descriptive information, basin characteristics, and streamflow statistics for USGS streamgages and ungaged stream locations throughout Pennsylvania. StreamStats also allows users to search upstream and (or) downstream from user-selected points to identify locations of and obtain information for water-resource-related activities, such as dams and streamgages. StreamStats is implemented on a state-by-state basis to allow individual states to customize the data development and underlying data sets to address their specific needs, issues, and objectives. Pennsylvania StreamStats (fig. 1), developed in cooperation with the Pennsylvania Department of Environmental Protection, Federal Emergency Management Agency, Pennsylvania State Association of Township Supervisors, and Susquehanna River Basin Commission, can be accessed through the national StreamStats web-page portal at http://streamstats.usgs.gov. Links are provided from this web page to individual state applications, instructions for using StreamStats, definitions of basin characteristics and streamflow statistics, and other supporting information. Currently (2010), the following functions are available on Pennsylvania StreamStats (not inclusive):