USGS Fact Sheet 2007-3081

Tennessee StreamStats: A Web-Enabled Geographic Information System Application for Automating the Retrieval and Calculation of Streamflow Statistics

By David E. Ladd and George S. Law

U.S. Geological Survey Fact Sheet 2007-3081, 2 pages (Published September 2007)

This report is available online only in PDF format: FS 2007-3081 (Opens the PDF file in a new window. ) (328 KB)

Cover thumbnailThe U.S. Geological Survey (USGS) provides streamflow and other stream-related information needed to protect people and property from floods, to plan and manage water resources, and to protect water quality in the streams. Streamflow statistics provided by the USGS, such as the 100-year flood and the 7-day 10-year low flow, frequently are used by engineers, land managers, biologists, and many others to help guide decisions in their everyday work. In addition to streamflow statistics, resource managers often need to know the physical and climatic characteristics (basin characteristics) of the drainage basins for locations of interest to help them understand the mechanisms that control water availability and water quality at these locations.

StreamStats is a Web-enabled geographic information system (GIS) application that makes it easy for users to obtain streamflow statistics, basin characteristics, and other information for USGS data-collection stations and for ungaged sites of interest. If a user selects the location of a data-collection station, StreamStats will provide previously published information for the station from a database. If a user selects a location where no data are available (an ungaged site), StreamStats will run a GIS program to delineate a drainage basin boundary, measure basin characteristics, and estimate streamflow statistics based on USGS streamflow prediction methods. A user can download a GIS feature class of the drainage basin boundary with attributes including the measured basin characteristics and streamflow estimates.


This report is available online only in PDF format: FS 2007-3081 (Opens the PDF file in a new window. ) (328 KB)

To view the PDF document, you need the Adobe Reader installed on your computer. (A free copy of the Adobe Reader may be downloaded from Adobe Systems Incorporated.)

Suggested citation: Ladd, D.E., and Law, G.S., 2007, Tennessee StreamStats: A Web-enabled Geographic Information System application for automating the retrieval and calculation of streamflow statistics: U.S. Geological Survey Fact Sheet 20073081, 2 p. (available online at

For more information, please contact David E. Ladd.

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