Willamette River Temperature TMDL
CE-QUAL-W2 Model

The CE-QUAL-W2 Model Version 3.1 has been applied to the Willamette River main stem system. The Oregon Department of Environmental Quality and the U.S. Army Corps of Engineers funded this project. Work elements were performed by the Department of Civil and Environmental Engineering, Portland State University , Oregon Department of Environmental Quality (ODEQ), and the Portland office of the U.S. Geological Survey (USGS) to set-up and calibrate the system model to field data for the summers of 2001 and 2002. The river basin model was originally divided into several reaches. Individual models were developed for each reach. These reaches were:

Reports for the model years 2001 and 2002 are downloadable below:

#
File
Comment
File Size
Posted
1
Model Boundary Conditions and Setup for 2001 and 2002 Final Version, no changes since Draft Version. 30 MB September 2, 2004
2
Model Calibration for 2001 and 2002 Final Version 8 MB September 2, 2004
3
Model Scenarios for 2001 and 2002 Final Version, no changes since Draft Version. 12 MB September 2, 2004

Calibrated model input files used by ODEQ for developing 2001 and 2002 TMDL model scenarios:

#
Model Piece
Description
Model Year
Model Year
3

Lower Willamette River (includes Columbia River)

RM 0.0 to 26.5

2001

2002

4

Middle Willamette River

RM 26.5 to 85.0

2001

2002

5

Upper Willamette River

RM 85.0 to 187.0

2001

2002

6

Coast Fork Willamette River and Middle Fork Willamette River (includes Row River and Fall Creek)

CF RM 0.0 to 28.9
MF RM 0.0 to 16.5

2001

2002

7

Lower Clackamas River

RM 0.0 to 26.5

2001

2002

8

Santiam/North Santiam River

RM 0.0 to 61.6

2001

2002

9

South Santiam River

RM 0.0 to 36.5

2001

2002

10

McKenzie River

RM 0.0 to 60.8

2001

2002

11

Long Tom River

RM 0.0 23.7

2001

2002


The North Santiam and Santiam models were developed by the Portland office of the U.S. Geological Survey. Information on the U.S. Geological Survey study on the North Santiam and Santiam River can be obtained via: http://oregon.usgs.gov/projs_dir/will_tmdl/model.html. For questions, please contact Dennis Ades, Oregon Department of Environmental Quality, at ades.dennis.r@deq.state.or.us.

The model input files for 2001 and 2002 were refined further to improve the calibration. The model refinements are minor and do not affect the the overall results provided by the models listed in the table above. The refined models are available below and a technical memorandum describing the model changes can be download here:

#
Model Piece
Description
Model Year
Model Year
1

Lower Willamette River (includes Columbia River)

RM 0.0 to 26.5

2001

2002

2

Middle Willamette River

RM 26.5 to 85.0

2001

2002

3

Upper Willamette River

RM 85.0 to 187.0

2001

2002

4

Lower Clackamas River

RM 0.0 to 26.5

2001

2002

5

McKenzie River

RM 0.0 to 60.8

2001

2002

6

Long Tom River

RM 0.0 23.7

2001

2002