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  3. Peak-Flow Frequency Analyses by the U.S. Geological Survey Wyoming - Montana Water Science Center
  4. Peak-flow frequency analyses for selected streamgages in and near Powell County, Montana, based on data through water year 2019
  5. Peak-flow frequency analyses for selected streamgages in and near Powell County, Montana, based on data through water year 2019

Peak-flow frequency analyses for selected streamgages in and near Powell County, Montana, based on data through water year 2019

Dates

Publication Date
Start Date
1899
End Date
2019

Citation

Alexander, J.S., Buchmiller, S.J., McCarthy, P.M., Siefken, S.A., and Armstrong, D.W., 2021, Peak-flow frequency analyses for selected streamgages in and near Powell County, Montana, based on data through water year 2019: U.S. Geological Survey data release, https://doi.org/10.5066/P9D1ICQB.

Summary

The USGS Wyoming-Montana Water Science Center (WY–MT WSC) completed a report (Sando and McCarthy, 2018) documenting methods for peak-flow frequency analysis following implementation of the Bulletin 17C guidelines. The methods are used to provide estimates of peak-flow quantiles for 66.7-, 50-, 42.9-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance probabilities (AEPs) for selected streamgages operated by the WY–MT WSC. This data release presents peak-flow frequency analyses for selected streamgages in and near Powell County, Montana, that were based on methods described by Sando and McCarthy (2018).

Contacts

Point of Contact :
Daniel W Armstrong
Originator :
J S Alexander, Stephanie J Buchmiller, P M McCarthy, Seth A Siefken, Daniel W Armstrong
Metadata Contact :
Daniel W Armstrong
Publisher :
U.S. Geological Survey
Cooperator/Partner :
Montana Department of Natural Resources and Conservation
Distributor :
U.S. Geological Survey - ScienceBase

Attached Files

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wymt_ffa_2019Powell.xslx.xml
Original FGDC Metadata
View 		98.82 KB application/fgdc+xml
wymt_ffa_2019Powell.xlsx 7.03 MB application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

Purpose

This dataset includes peak-flow frequency analyses and results for selected streamgages in and near Powell County, Montana, based on data through water year 2019. Estimates of peak-flow magnitudes for 66.7-, 50-, 42.9-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent AEPs are reported. The procedures used for the peak-flow frequency analyses are documented in Sando and McCarthy (2018).

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