palouse falls watedshed - area of the Palouse Falls. The...

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Michael Knutson (11040656) Wulf 17 April 2009 Geology Palouse Falls Watershed The Palouse Falls is section of the Palouse River that was carved out by the great Missoula Floods during the last ice age. The Palouse River is fed from Moscow Mountain, and is a tributary of the Snake River. This dendritic system can be traced all the way to the Columbia River. The Palouse Falls occurs quite early in the part of the Hydrologic Cycle that occurs on the ground. The flow of the Palouse River near the Falls is mostly turbulent, as seen by the erratic water rapids. The erosion of the Palouse River has been enhanced by mass wasting to form the entire Columbia River Basin, including the Palouse River tributary. The Palouse River is a young river, and thus is relatively straight until it merges into the much older snake river. The Columbia River Basalt rock group stretches across the upper northwest and is prominent in the
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Unformatted text preview: area of the Palouse Falls. The basalt has low porosity but porosity none the less, because of fractures in the rock. This fracture porosity makes the Columbia River Basalt group the largest aquifer in Eastern Washington. Since the region is mostly all basalt, there are very little aquitards around the area. Thus the aquifers are unconfined. The water table in the region has been dropping at a rate of two feet per year. The rivers of the region have eroded and carved out the entire basalt group, causing the bends and turns in the deep canyons in which the rivers reside. At some points, the cliffs are up to fifty feet high. Some of the more winding rivers display large point bars and cut banks at the bends, clearly showing the erosion and deposition of sediment along the stream....
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This note was uploaded on 03/28/2012 for the course GEO 101 taught by Professor Wilkie during the Fall '08 term at Washington State University .

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