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Ecology Publications & Forms |
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Ecology Publications & Forms |
| Title | Quality Assurance Project Plan Cowiche Creek Shallow Aquifer Recharge for Streamflows Study |
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| VIEW NOW |
Quality Assurance Project Plan Cowiche Creek Shallow Aquifer Recharge for Streamflows Study (Number of pages: 77) (Publication Size: 2412KB)
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| Author(s) | Office of Columbia River | ||||
| Description | In 2023, Trout Unlimited (TU) received a grant from Office of Columbia River entitled Cowiche Creek Shallow Aquifer Recharge Study (WRYBIP-2325-TroUnl-00043). This Quality Assurance Project Plan (QAPP) was prepared by Forsgren Associates (Forsgren) and American Land and Water Consulting, LLC (American) on behalf of TU to outline procedures for data collection and analysis for a hydrogeologic study of the South Fork of Cowiche Creek (SFCC) in Yakima County, Washington. The Cowiche Creek watershed drains the foothills of the eastern Cascade Mountains as a subbasin within Water Resources Inventory Area (WRIA) 38 (Naches). The Cowiche Creek Shallow Aquifer Recharge Study (project) will evaluate the feasibility of using shallow aquifer recharge (SAR) to enhance streamflows with the goal of improving late season (late-July through September) flows by =10%—at least 0.1 to 0.2 cubic feet per second (cfs)—near the confluence of the North-South Forks Cowiche Creek. The project drivers are low flows (minimum flows below 1 cfs and average flows below 2 cfs) in August and September. The project will use desktop and field investigations to develop a hydrogeologic conceptual model of SFCC and the shallow unconsolidated aquifer within the study area that will be used to assess the feasibility of implementing SAR via gravity flow. |
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| Contact | Tim Poppleton at 509-454-4241 or tim.poppleton@ecy.wa.gov | ||||
| Keywords | QAPP, stream flows, aquifer recharge, ASR, Cowiche Creek |
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