Peak-flow frequency analyses and results based on data through water year 2011 for selected streamflow-gaging stations in or near Montana: Chapter C in Montana StreamStats

Scientific Investigations Report 2015-5019- C
Prepared in cooperation with the Montana Department of Transportation and Montana Department of Natural Resources and Conservation
By: , and 

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Abstract

Chapter C of this Scientific Investigations Report documents results from a study by the U.S. Geological Survey, in cooperation with the Montana Department of Transportation and the Montana Department of Natural Resources, to provide an update of statewide peak-flow frequency analyses and results for Montana. The purpose of this report chapter is to present peak-flow frequency analyses and results for 725 streamflow-gaging stations in or near Montana based on data through water year 2011. The 725 streamflow-gaging stations included in this study represent nearly all streamflowgaging stations in Montana (plus some from adjacent states or Canadian Provinces) that have at least 10 years of peak-flow records through water year 2011. For 29 of the 725 streamflow-gaging stations, peak-flow frequency analyses and results are reported for both unregulated and regulated conditions. Thus, peak-flow frequency analyses and results are reported for a total of 754 analyses. Estimates of peak-flow magnitudes for 66.7-, 50-, 42.9-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance probabilities are reported. These annual exceedance probabilities correspond to 1.5-, 2-, 2.33-, 5-, 10-, 25-, 50-, 100-, 200-, and 500-year recurrence intervals.

Suggested Citation

Sando, S.K., McCarthy, P.M., and Dutton, D.M., 2016, Peak-flow frequency analyses and results based on data through water year 2011 for selected streamflow-gaging stations in or near Montana: U.S. Geological Survey Scientific Investigations Report 2015–5019–C, 27 p., http://dx.doi.org/10.3133/sir20155019C.

ISSN: 2328-0328 (online)

Study Area

Table of Contents

  • Acknowledgments
  • Abstract
  • Introduction
  • Data Compilation and Pre-Analysis Augmentation and Manipulation
  • Determination of Regulation Status of Streamflow-Gaging Stations
  • Peak-Flow Frequency Analyses and Results
  • Summary
  • References Cited
  • Appendix 1. Information on Streamflow-Gaging Stations, Data Augmentation, Regulation Structures, and Peak-Flow Frequency Analyses and Results

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Peak-flow frequency analyses and results based on data through water year 2011 for selected streamflow-gaging stations in or near Montana: Chapter C in Montana StreamStats
Series title Scientific Investigations Report
Series number 2015-5019
Chapter C
DOI 10.3133/sir20155019C
Year Published 2016
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) WY-MT Water Science Center
Description Report: v, 27 p.; 6 Tables
Larger Work Type Report
Larger Work Subtype USGS Numbered Series
Larger Work Title Montana StreamStats (Scientific Investigations Report 2015-5019)
Country United States
State Montana
Online Only (Y/N) Y
Additional Online Files (Y/N) Y