Physical Sciences and Mathematics Commons^™

Kinematics Of The Swift Creek Landslide, Northwest Washington, Alexander Scott Mckenzie-Johnson

WWU Graduate School Collection

Deep-seated landslides significantly influence mountain landscapes in Washington State, yet relatively few of these landslides have been studied in detail. I selected the Swift Creek landslide, a large (approximately 5.489 x 10⁵ m² [54.89 hectares]), deep-seated landslide located on Sumas Mountain in northwest Washington, to be the site of a detailed study. This study, the first phase in a planned long-term study to be conducted by WWU, consisted of a detailed topographic survey, geomorphic mapping, repeated GPS surveying of monitoring points (consisting of six surveys from July 2002 to June 2003), tree-core analysis (dendrogeomorphology), and historic aerial photograph …