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StreamStats is a Web application for water-resources planning and engineering purposes. The map-based user interface can be used to delineate drainage areas for user-selected sites on streams, generate basin characteristics and estimate flow statistics for the selected sites. Users also can select the locations of U.S. Geological Survey data-collection stations, shown as triangles on the StreamStats map, to get flow statistics and other station-specific information.
StreamStats for New Jersey can be used to estimate instantaneous flood discharges with exceedance probabilities of 0.5, 0.2, 0.1, 0.04, 0.02, 0.01, and 0.002 for ungaged, unregulated or slightly regulated, non-tidal streams in New Jersey. These exceedance probabilities correspond to recurrence intervals of 2-, 5-, 10-, 25-, 50-, 100-, and 500-years, respectively. StreamStats for New Jersey also can be used to estimate monthly flow-duration and monthly low-flow frequency statistics for ungaged streams in Coastal Plain and non-coastal regions of New Jersey for baseline and current land- and water-use conditions. The equations were developed to estimate 87 different streamflow statistics, which include the monthly 99-, 90-, 85-, 75-, 50-, and 25-percentile flow-durations of the minimum 1-day daily flow; the August–September 99-, 90-, and 75-percentile minimum 1-day daily flow; and the monthly 7-day, 10-year (M7D10Y) low-flow frequency. The reports present the regression equations used to estimate the noted streamflow statistics, describe the errors associated with the estimates, and describe the methods used to develop the equations and to measure the basin characteristics used in the equations. Users should familiarize themselves with the reports before using StreamStats to obtain estimates of streamflow statistics for gaged and ungaged sites.
New Jersey StreamStats Application Information
NOTE 1: Although 1990 population density was used for the development of the regression equations in SIR 2009-5167, the New Jersey StreamStats application uses the more current 2000 population-density data.
NOTE 2: Watson and McHugh (2014) provide two sets of regression equations for flow duration and low-flow frequency statistics, intended to reflect conditions for a “base” and a “current” period. The “base” period is defined as the years a streamgage had little to no change in development and water use. The “current” period is defined as the 1989–2008 water years (Oct. 1, 1988 to Sept. 30, 2008). The base period of record is representative of a period when the basin was unaffected by change in development. The current period is representative of more recent increased development.
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The USGS StreamStats website is a GIS-based web tool for estimating streamflows at gaged and ungaged locations. Features similar to the National Streamflow Statistics program are presented to users with no programs to install. Users can visit the StreamStats website linked here and click on a stream location on the interactive map to compute estimated streamflows for floods and other statistics.
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Below are partners associated with this project.