Spokane River DO TMDL home > Technical Information

Technical Information

The Department of Ecology contracted with the Army Corps of Engineers to develop a water quality computer model for the Spokane River and Lake Spokane.  The model used data obtained from recent and past studies. Ecology used this model to predict water quality changes in response to various modeling scenarios. The model and its predictions were used to establish a total maximum daily load (TMDL) for pollutants that affect dissolved oxygen in the Spokane River and Lake Spokane.

The modeling results and the Foundational Concepts for the Spokane River TMDL Managed Implementation Plan have been incorporated into a revised Spokane River DO TMDL in 2007.

2007 Draft Dissolved Oxygen TMDL Report Development:

• Spokane River and Lake Spokane Dissolved Oxygen Total Maximum Daily Load – Water Quality Improvement Report
• Foundational Concepts for the Spokane River TMDL Managed Implementation Plan (PDF)

Study and Modeling Links:

• Spokane River and Lake Spokane (Long Lake) Pollutant Loading Assessment for Protecting Dissolved Oxygen (Cusimano, 2004)
  www.ecy.wa.gov/biblio/0403006.html
  • Spokane River and Lake Spokane Total Maximum Daily Load Study, Data Summary Report, Ecology (Ecology Publication)
    www.ecy.wa.gov/biblio/0303023.html
  • Spokane River and Lake Spokane Total Maximum Daily Load Study, Data Summary Report - data appendix (zipped files) (Ecology Publication)
    www.ecy.wa.gov/pubs/0303023.zip
  • Response to comments on Pollutant Loading Assessment report (Cusimano, 2004)
     
• Spokane River - Lake Spokane CE-QUAL-W2 Modeling
  • Portland State University May 2007 Technical Memo (PDF)
  • Portland State University August 2007 Technical Memo (PDF)
  • 2009 Modeling Products:
    Portland State University (PSU) set up a FTP site that contains copies of the PSU presentations (for 2/19/09 and 3/25/09), draft animations, and some of the field data used to calibrate the model. You can access the ftp site as noted below:

    The file(s) are located at http://www.ce.pdx.edu/~cewq/ftp/Spokane/drall.cgi (click, or copy this address into your browser)

    login username: "Projects" and password: "a3waspk"

2004 Draft Dissolved Oxygen TMDL Report Development:

• 2004 draft DO TMDL Submittal (PDF)
• Archived Presentations

Back to top of page