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The StreamStats Program

New York

Beta version 4 has arrived!

Beta version 4 is now available for most states on a trial basis, and version 3 remains available. Beta version 4 provides a single user interface (at for all states that are implemented, rather than separate applications for each state, as in versions 2 and 3, and the user interface is more user friendly than previous versions. Information for user-selected ungaged sites currently cannot be obtained using beta version 4 for the States of Iowa, Indiana, North Carolina, and Oregon because of unique functionality for those states that is not yet implemented. Users are encouraged to provide comments and report bugs by use of the Help button on the interface, which also provides access to limited beta version 4 documentation. See below for additional information about versions both 3 and 4.

Please contact the StreamStats by email at if you have any questions.

StreamStats for New York can be used to estimate (1) instantaneous flood discharges with exceedance probabilities of 0.8, 0.667, 0.5, 0.2, 0.1, 0.04, 0.02, 0.01, 0.005, and 0.002 (1.25-, 1.5-, 2-, 5-, 10-, 25-, 50-, 100-, and 500-year recurrence intervals, respectively) for ungaged, unregulated, rural streams throughout New York; and (2) bankfull discharge and channel characteristics of streams throughout New York. The reports below present the regression equations used to estimate these statistics, 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 ungaged sites.

Computation of flood discharges for the exceedance probabilities listed above have been updated at many gaged locations across New York (Wall and others, 2014). These data can be viewed by using either the "Identify" or "Streamgage Information" button and clicking on a streamgage icon. Select the "Site Number" in the pop-up window and "Peak Flow" and "Flow-Duration" Statistics will be tabulated.

Wall, G.R., Murray, P.M., Lumia, Richard, and Suro, T.P., 2014, Maximum known stages and discharges of New York streams and their annual exceedance probabilities through September 2011: U.S. Geological Survey Scientific Investigations Report 2014-5084, 16 p.


Interactive Map


General information on the Interactive Map application, as well as specific sources and computation methods for basin characteristics are available here.

In addition to solving the above regression equations, New York StreamStats can be used to delineate drainage areas and to provide the basin characteristics that are needed as input for the New York Streamflow Estimation Tool (NYSET) program, which can estimate daily mean streamflows for water years 1961-2010 for user-selected sites on ungaged streams. NYSET can also compute 7-day low-flow statistics (7Q2 and 7Q10), as well as monthly probability flows for the 1-, 2-, 5-, 10-, 15-, 20-, 25-, 30-, 35-, 40-, 45-, 50-, 55-, 60-, 65-, 70-, 75-, 80-, 85-, 90-, 95-, 98-, and 99-percent exceedances. The estimates provided by NYSET assume that flows at the selected site are minimally altered by human activities. Additional information on the NYSET program, including instructions for downloading, installing, and operating the program are at the following web page:

StreamStats for New York was developed in cooperation the New York City Department of Environmental Protection, the New York State Department of Environmental Conservation, the New York Department of State, and the New York State Department of Transportation.

Link to the New York City Department of Environmental Protection
Link to the New York State Department of Environmental Conservation
Link to the New York State Department of State
Link to the New York State Department of Transportation

Contact Us if you experience any problems with this application.

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