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Preliminary flood-duration frequency estimates using naturalized streamflow records for the Willamette River Basin, Oregon

Open-File Report 2018-1020

Prepared in cooperation with the U.S. Army Corps of Engineers and the Bureau of Reclamation
By:
https://doi.org/10.3133/ofr20181020

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Abstract

In this study, “naturalized” daily streamflow records, created by the U.S. Army Corps of Engineers and the Bureau of Reclamation, were used to compute 1-, 3-, 7-, 10-, 15-, 30-, and 60-day annual maximum streamflow durations, which are running averages of daily streamflow for the number of days in each duration. Once the annual maximum durations were computed, the floodduration frequencies could be estimated. The estimated flood-duration frequencies correspond to the 50-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent probabilities of their occurring or being exceeded each year. For this report, the focus was on the Willamette River Basin in Oregon, which is a subbasin of the Columbia River Basin. This study is part of a larger one encompassing the entire Columbia Basin.

Suggested Citation

Lind, G.D., and Stonewall, A.J., 2018, Preliminary flood-duration frequency estimates using naturalized streamflow records for the Willamette River Basin, Oregon: U.S. Geological Survey Open-File Report 2018-1020, 17 p., https://doi.org/10.3133/ofr20181020.

ISSN: 2331-1258 (online)

Study Area

Table of Contents

  • Abstract
  • Introduction
  • Methods
  • Summary
  • References Cited

Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Preliminary flood-duration frequency estimates using naturalized streamflow records for the Willamette River Basin, Oregon
Series title:
Open-File Report
Series number:
2018-1020
DOI:
10.3133/ofr20181020
Year Published:
2018
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Reston, VA
Contributing office(s):
Oregon Water Science Center
Description:
iv, 17 p.
Country:
United States
State:
Oregon
Other Geospatial:
Willamette River Basin
Online Only (Y/N):
Y