LiDAR Assessment of Sediment Transport Related to the Removal of the Marmot Dam, Sandy River, Oregon
Document Type
Thesis
Date of Degree Completion
Winter 2013
Degree Name
Master of Science (MS)
Department
Geological Sciences
Committee Chair
Lisa L. Ely
Second Committee Member
Jim O'Connor
Third Committee Member
Anne Egger
Abstract
Four Aerial LiDAR survey were used to examine the impacts of the 2007 removal of the Marmot Dam on the Sandy River, Oregon. Geomorphic Change Detection software was used to answer three project goals: 1) to investigate how the dam removal affected sediment distribution in the lower reach of the river, several km downstream of the dam, 2) to determine whether the pulse of sediment from the dam removal created a detectable, successive downstream accumulation of sediment through time, and 3) to assess the effect of natural high-flow events on the sediment distribution related to the dam removal. The results showed that a sediment pulse could be identified and tracked up to 13 km downstream from the former dam, but below that the pulse could not be detected from normal river processes. A majority of the sediment deposited from the dam release moved downstream as a result of high-flow events during winter months.
Recommended Citation
Matzek, Carl Daniel, "LiDAR Assessment of Sediment Transport Related to the Removal of the Marmot Dam, Sandy River, Oregon" (2013). All Master's Theses. 1446.
https://digitalcommons.cwu.edu/etd/1446
Included in
Environmental Monitoring Commons, Fresh Water Studies Commons, Hydrology Commons, Sedimentology Commons, Water Resource Management Commons