SWToolbox: A surface-water tool-box for statistical analysis of streamflow time series

Techniques and Methods 4-A11
Prepared in cooperation with the U.S. Environment Protection Agency
By: , and 

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Abstract

This report is a user guide for the low-flow analysis methods provided with version 1.0 of the Surface Water Toolbox (SWToolbox) computer program. The software combines functionality from two software programs—U.S. Geological Survey (USGS) SWSTAT and U.S. Environmental Protection Agency (EPA) DFLOW. Both of these programs have been used primarily for computation of critical low-flow statistics. The main analysis methods are the computation of hydrologic frequency statistics such as the 7-day minimum flow that occurs on average only once every 10 years (7Q10), computation of design flows including biologically based flows, and computation of flow-duration curves and duration hydrographs. Other annual, monthly, and seasonal statistics can also be computed. The interface facilitates retrieval of streamflow discharge data from the USGS National Water Information System and outputs text reports for a record of the analysis. Tools for graphing data and screening tests are available to assist the analyst in conducting the analysis.

Suggested Citation

Kiang, J.E., Flynn, K.M., Zhai, Tong, Hummel, Paul, and Granato, Gregory, 2018, SWToolbox: A surface-water tool-box for statistical analysis of streamflow time series: U.S. Geological Survey Techniques and Methods, book 4, chap. A–11, 33 p., https://doi.org/10.3133/tm4A11.

ISSN: 2328-7055 (online)

Table of Contents

  • Acknowledgments 
  • Preface 
  • Abstract 
  • Overview
  • Statistical Analysis Methods
  • Using SWToolbox: Getting Started 
  • Using SWToolbox: Analysis Menu Tools 
  • Summary
  • References Cited

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title SWToolbox: A surface-water tool-box for statistical analysis of streamflow time series
Series title Techniques and Methods
Series number 4-A11
DOI 10.3133/tm4A11
Year Published 2018
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Office of Surface Water
Description Report: vii, 34 p.; Software Download and Release Notes
Larger Work Type Report
Larger Work Subtype USGS Numbered Series
Larger Work Title Section A: Statistical analysis in Book 4: Hydrologic analysis and interpretation
Public Comments This report is Chapter 11 of Section A: Statistical analysis in Book 4: Hydrologic analysis and interpretation.
Online Only (Y/N) Y
Additional Online Files (Y/N) Y