Water Temperature in Tributaries, Off-Channel Features, and Main Channel of the Lower Willamette River, Northwestern Oregon, Summers 2016 and 2017

Open-File Report 2018-1184
Prepared in cooperation with the City of Lake Oswego, City of Wilsonville, Meyer Memorial Trust, and Benton Soil and Water Conservation District
By: , and 

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Abstract

The U.S. Geological Survey collected continuous water-temperature data in select tributaries of the lowermost 80 kilometers (50 miles) of the Willamette River in northwestern Oregon, during summers 2016 and 2017. Point measurements of water temperature and water quality (dissolved oxygen, specific conductance, and pH) also were collected at multiple locations and depths within the river and in the lower reaches of three major tributaries (Clackamas and Molalla Rivers, and Johnson Creek). These datasets were collected to identify potential locations of cold-water refuges for sensitive fish species, and to characterize daily, seasonal, and spatial variability in water conditions. These datasets may be useful for local municipalities that are required to identify cold-water refuges (as defined in State of Oregon water-quality standards) and determine approaches for protecting and enhancing these features as part of their Willamette River water-temperature Total Maximum Daily Load implementation plans. This report documents the data collection methods, provides summary graphs and maps of the water-temperature data, and outlines steps for accessing the data.

Suggested Citation

Mangano, J.F., Piatt, D.R., Jones, K.L, and Rounds, S.A., 2018, Water temperature in tributaries, off-channel features, and main channel of the lower Willamette River, northwestern Oregon, summers 2016 and 2017: U.S. Geological Survey Open-File Report 2018-1184, 33 p., https://doi.org/10.3133/ofr20181184.

ISSN: 2331-1258 (online)

Study Area

Table of Contents

  • Abstract
  • Introduction
  • Data Collection Methods and Dataset Access
  • Temperature Data by Monitoring Reach
  • Summary
  • Acknowledgments
  • References Cited
  • Appendix 1. Photographs of Tributaries with Continuous Temperature Sensors

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Water temperature in tributaries, off-channel features, and main channel of the lower Willamette River, northwestern Oregon, summers 2016 and 2017
Series title Open-File Report
Series number 2018-1184
DOI 10.3133/ofr20181184
Year Published 2018
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Oregon Water Science Center
Description iv, 33 p.
Country United States
State Oregon
Other Geospatial Lower Willamette River
Online Only (Y/N) Y