Link to USGS home

Welcome to StreamStats

Alaska (Cook Inlet Basin only)

Beta version 4 has arrived and peak-flow regression equations are not available as of October 7, 2016!

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 is available for in Alaska only for the Cook Inlet Basin. This application provides the abilities delineate drainage basins at user selected sites, determine the drainage area and the basin average mean annual precipitation for 1971 to 2000 from the PRISM climate dataset, and estimate the 50-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual peak-flow exceedance probability discharges using regression equations from the below report:

In addition to presentation of the regression equations, the report also describes the errors associated with the estimates obtained from the equations, the methods used to develop the equations, and the methods used to compute the basin characteristics used as explanatory variables in the equations. StreamStats users should familiarize themselves with the report before attempting to obtain estimates of streamflow statistics for ungaged sites. Application of the equations to ungaged sites assumes that flows at the sites occur under natural conditions.


Interactive Map


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

StreamStats was developed for Alaska in cooperation with the Alaska Department of Natural Resources, the Alaska Department of Transportation and Public Facilities, and the U.S. Army Corps of Engineers.

Alaska Department of Natural Resources Link to Alaska Department of Transportation and Public Facilities Link to U.S. Army Corps of Engineers

Contact Us if you experience any problems with this application.

Best viewed in Internet Explorer 10 or higher with pop-up blocker disabled