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NSS, Version 4.0

National Streamflow Statistics program

NOTE: There is a new version of the database (NSS_v4_2009-04-08.mdb). This database version will only work with NSSv4.0b8.exe. Please download both.

Information

• Summary of NSS
• Version history
• How to order U.S. Geological Survey printed documentation
• How to register to receive software updates and enhancement notices

Software

• Select the following links to retrieve the two distribution files required for a complete installation of NSS. See the README file for installation instructions.

  NSSv4.0b8.exe (6.3 Mb) self-extracting executable of the NSS software

  NSS_v4_2009-04-08.mdb (12 Mb) Microsoft Access data base needed to run NSS - Previous version of the data base was dated: 02/27/09

  (References to commercial vendors of software products or services is for informational purposes only and does not imply endorsement by the U.S. Government.)

  Please note! The database for NSS will be changed frequently to update and add new equations. Please check this web site often to determine if a new version of the data base is available. The version history link will document any changes made to the data base 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.

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-xxxx, 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:

Robert R. Holmes, Jr., Ph.D., P.E., D.WRE
U.S. Geological Survey
Office of Surface Water
1400 Independence Road, MS430
Rolla, MO 65401
(electronic mail: bholmes@usgs.gov)