Graduate Thesis Or Dissertation
 

Design and implementation of a physical model for Keystone Harbor, WA

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/4m90dz60m

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  • Strong tidal currents experienced at Keystone Harbor, WA, have caused navigational hazards and disrupted ferry service in the area. This thesis presents details of the design, construction and implementation of a large scale physical model of Keystone Harbor used to evaluate the effectiveness of proposed jetty design alternatives to improve navigation at the Keystone Ferry Terminal. A fixed bed, 1:40 Froude scaled model was built in the Tsunami Wave Basin at the 0. H. Hinsdale Wave Research Laboratory using a bathymetric survey of Keystone Harbor. A recirculating pump system simulated the peak ebb tidal current and a wavemaker simulated 50 year storm conditions. A series of five tests were conducted to (1) evaluate the performance of existing and proposed jetty extensions and (2) determine whether these changes would have an adverse affect on the neighboring cobble beach. Analysis revealed large velocity gradients for all 4 proposed alternatives at the harbor channel entrance which may have significant impacts on navigational safety. No adverse impacts were observed on the adjacent beaches.
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