NSS - National Streamflow Statistics Program

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NSS Updates

Would you like to be notified when updates are made to the NSS program or new equations are added to the database?

Email Todd Koenig at tkoenig@usgs.gov to be added to the mailing list.

NSS, Version 6

National Streamflow Statistics program

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Software

NSS is a 2-part download consisting of a program installer and a password-protected database file which must be used together. See the README file for installation instructions.

Select both of the following links to retrieve the two distribution files required for a complete installation of NSS:

Software Downloads
NSSv6.1.exe	NSS Program Installer: self-extracting executable of the NSS software (2,422,642 bytes, posted 2017-01-10). Please de-install any previous version of NSS and replace it with the most recent version before using the latest NSS database.
NSS_v6_2018-01-12.mdb	NSS Database: needed by NSS software (19,103,744 bytes). Previous version of the database was dated 2017-09-27. Note: This file is password-protected and designed to be opened only by the NSS program. MS Access® is not required.

Please note: The database for NSS can change frequently as equations are added and updated. Please check this web site often to determine if a new version of the database is available. The version history link will document any changes made to the database or the software.

Region-of-Influence Data Files

Regional-of-Influence (ROI) is a method of developing custom regression equations for estimating streamflow statistics for individual ungaged sites. The method is described in the documentation provided below. One or two additional files need to be downloaded for each state and placed in the directory in which users have installed the NSS software and database to allow NSS to run ROI regressions.

Data Files
Louisiana	LA.rec.bin.zip
	LA.rho.bin.zip
Minnesota	MN.rec.bin.zip
	MN.rho.bin.zip
Texas	TX.rec.bin.zip

Documentation

How to order U.S. Geological Survey printed documentation
Fact sheet describing NSS program: Turnipseed, D.P., and Ries, K.G., III, 2006, The National Streamflow Information Program: Estimating High and Low Streamflow Statistics for Ungaged Sites: U.S. Geological Survey Fact Sheet 2007-3010, 4 p.
T&M Chapter 6 of Book 4, The National Streamflow Statistics Program: A Computer Program for Estimating Streamflow Statistics for Ungaged Sites

Documentation for Individual States

Point of contact for NSS:

Todd Koenig
U.S. Geological Survey
Office of Surface Water
1400 Independence Road, MS100
Rolla, MO 65401
(electronic mail: tkoenig@usgs.gov)

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Page Last Modified: Tuesday, 13-Oct-2015