Assessment of Surface Water and Groundwater Interchange in the Walla Walla River Watershed
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|Description||Instream mini-piezometers and a seepage run were used to examine the surface water/groundwater interchange within the Walla Walla watershed. This study determined that the upper areas of the watershed were predominately losing (surface water discharging to groundwater) and the lower reaches were gaining (groundwater discharging to surface water). The Touchet River, Walla Walla River, and Mill Creek were losing in their upper reaches.
The Walla Walla River and Mill Creek basins are composed of coarse gravel in the upper portions and fine-grained deposits in the lower portions. This distribution of materials results in groundwater discharging to surface springs which is more significant in the western part of the basin, at the confluence of the Touchet and Walla Walla rivers.
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|Keywords||303(d), section 303, assessment, basin, creek, discharge, flow, groundwater, river, surface water, Total Maximum Daily Load, waste, water, watershed, results|
|WATERSHED||Water Resource Inventory Area 32 Walla Walla|
|DATA||Environmental Information Management (EIM) #KSIN0007
Quality Assurance Project Plan: Walla Walla River Tributaries Temperature Total Maximum Daily Load
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