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Ecology Publications & Forms |
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Ecology Publications & Forms |
| Title | Upper Chehalis River Basin Temperature Total Maximum Daily Load |
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Upper Chehalis River Basin Temperature Total Maximum Daily Load (Number of pages: 164) (Publication Size: 3MB)
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| Author(s) | Water Quality Program | ||||||
| Description | The Upper Chehalis River Basin TMDL, developed by the Washington State Department of Ecology, is being established for surface water temperature standard exceedences that are caused almost entirely by solar radiation. Temperature is a measure of heat, which is considered a pollutant under Section 502(6) of the Clean Water Act. Heat generated by the amount of solar radiation from sunlight reaching the stream provides energy to raise water temperatures. Contributions of heat from municipal and industrial point sources in the Upper Chehalis River are small, but they have been addressed in this TMDL through wasteload allocations. This TMDL is designed to address impairments due to surface water temperature increases on nine water quality-limited streams (representing 19 segments) located in the watershed and provide goals for protection of all remaining streams. Streamside shade is used as a surrogate measure for water temperature. Use of surrogate measures is allowed by federal regulations (40 CFR 130.3) and the July 1998 Report to the Federal Advisory Committee on the TMDL Program (EPA-100-R-98-006). A decrease in shade increases incoming solar radiation and the resultant heat transfer to the stream. A more complete description of the factors influencing stream system temperatures appears in Appendix E. | ||||||
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The mission of the Department of Ecology is to protect, preserve, and enhance Washington’s environment. To help us meet that goal, please consider the environment before you print or request a copy.
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| Contact | Andrew Kolosseus at 360-407-7543 or andrew.kolosseus@ecy.wa.gov | ||||||
| Keywords | temperature, basin, TMDL, Total Maximum Daily Load | ||||||
| RELATED PUBLICATIONS | Title:
Upper Chehalis River Watershed Multi-Parameter Total Maximum Daily Load: Water Quality Data Review The Chehalis/Grays Harbor Watershed Dissolved Oxygen, Temperature, and Fecal Coliform Bacteria TMDL: Detailed Implementation (Cleanup) Plan Upper Chehalis River Fecal Coliform Bacteria Total Maximum Daily Load: Submittal Report Upper Chehalis River Fecal Coliform Bacteria Total Maximum Daily Load Recommendations Revised -- Upper Chehalis River Basin Dissolved Oxygen Total Maximum Daily Load Submittal Report Black River Wet Season Nonpoint Source Total Maximum Daily Load Study Black River Dissolved Oxygen and Phosphorus Total Maximum Daily Load Study Upper Chehalis River Dry Season Total Maximum Daily Load Study |
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