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Willamette River Water Temperature Investigation

In 2002, the U.S. Geological Survey (USGS) began an investigation of water temperature issues in the Willamette River Basin, with a focus on water temperature in the North Santiam and Santiam Rivers. This effort included the development of a flow and temperature model of those rivers, starting at Big Cliff Dam and ending at the mouth of the Santiam River where it joins the Willamette River. This work was performed in an effort to better understand, quantify, and model those processes that determine stream temperature.

The project was part of a larger effort in support of the Oregon Department of Environmental Quality's task of producing a water temperature Total Maximum Daily Load (TMDL) for the Willamette River and its largest tributaries, as required by the Federal Clean Water Act. As part of this project, USGS personnel:

The North Santiam and Santiam River model has been completed and documented in a USGS report, which can be downloaded from this web site as soon as it becomes available:

Sullivan, A.B. and Rounds, S.A., 2004, Modeling streamflow and water temperature in the North Santiam and Santiam Rivers, Oregon: U.S. Geological Survey Scientific Investigations Report 2004-5001.
[Available online at]

Results, Reports, Models, and Data

o Project overview
A discussion of temperature issues and project objectives
o Main-stem Willamette River bathymetric survey
Documentation of methods, and links to data
o Dye studies
Travel-time investigations on the Willamette and Long Tom Rivers in 2002
o Tributary width survey
Documentation of methods, and links to data
o North Santiam and Santiam River model
A description of the model, as well as links to the data used by the model and the model itself

Questions? Comments? For more information about this project, contact:

Stewart Rounds
U.S. Geological Survey
2130 SW 5th Avenue
Portland, OR 97201

Oregon Water Science Center Home page
Oregon Water Science Center Hydrologic Studies page

U.S. Department of the Interior | U.S. Geological Survey
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