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| Title | Quality Assurance Project Plan: Hangman Creek Watershed Dissolved Oxygen and pH Total Maximum Daily Load Water Quality Study Design | |||
| Month-Year Published | October 2008 | |||
| Online Availability |
1392 kilobytes, requires version 4.0 or later of Adobe Acrobat Reader Software get Acrobat Reader
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| Short Description |
This is the Water Quality study design for the Hangman Creek Watershed Dissolved Oxygen and pH Total Maximum Daily Load. (Also see abstract below) | |||
| Publication Number | 08-03-117 | |||
| Author(s) | Joy, J. | |||
| Print Availability | ||||
| Number of pages | 71 pp. | |||
| Keywords | creek, dissolved oxygen, Ecology, internet, lake, model, pH, phosphorus, quality, quality assurance, quality assurance project plan, river, Spokane River, Total Maximum Daily Load, waste, water, water quality, watershed | |||
| Subject Waterbodies |
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| Related Web Content | Hangman Creek | |||
| Abstract | Long Description |
Each study conducted by the Washington State Department of Ecology must have an approved Quality Assurance Project Plan. The plan describes the objectives of the study and the procedures to be followed to achieve those objectives. After completion of the study, a final report describing the study results will be posted to the Internet. Hangman Creek has been the subject of Total Maximum Daily Load (TMDL) evaluations for fecal coliform bacteria, temperature, and turbidity. Phosphorus loads also have been evaluated to assess seasonal impacts for the Spokane River/ Lake Spokane Dissolved Oxygen TMDL. However, the possible role of phosphorus in Hangman Creek watershed pH and dissolved oxygen (DO) criteria violations has not been assessed because data were lacking. The pH and DO violations observed in the watershed are thought to be the result of inadequate shade, low streamflows, and excessive nitrogen or phosphorus loads. TMDL investigations planned for 2008 and 2009 will fill the data gaps to complete the pH and DO TMDLs in the watershed. Data collection will include synoptic surveys during the summer and fall low-flow season, monitoring nutrient and chemical reference conditions in four ecoregions, and monitoring Washington/Idaho border nutrient loads. Data collected also will supply water quality models and statistical analysis to determine load and wasteload allocations. |
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