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Date Permissions Signed
Date of Award
Master of Science (MS)
Schwartz, Maurice L.
Suczek, Christopher A., 1942-2014
Geomorphic and sedimentologic indicators of shore drift were used to delineate the boundaries of drift unit cells and their direction of net shore-drift along the 110 km of Pacific coastline of Clallam and Jefferson Counties, Washington. These indicators include changes in bluff morphology, sediment size gradation, beach width and slope, direction of spit progradation and stream mouth diversion, deposition and/or erosion at drift obstructions, identifiable sediment, and nearshore bar orientation. Drift determinations were based on a field oriented approach emphasizing such long-term indicators, supplemented by aerial photography, and literature relevant to the coast.
Wind from the south-southwest prevail and predominate over Western Clallam and Jefferson Counties. This results in a northerly net shore-drift direction dominating along the study area. However, short drift reversals do occur in the wave shadow of headlands, where waves are refracted around nearshore islands and stacks, and where the orientation of the coast differs considerably from the overall trend.
Thirty drift cells, ranging from 0.4 km to over 26 km in length, have been identified and their direction of net shore-drift determined along the Pacific coast of Clallam and Jefferson Counties. The predominant southwesterly wind-generated waves dominate the direction of net shore-drift as evidenced by a northerly drift direction in all but six of the drift unit cells.
Shore drift, drift unit cells, Pacific coastline
Western Washington University
Clallam County (Wash.); Jefferson County (Wash.)
Copying of this thesis in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this thesis for commercial purposes, or for financial gain, shall not be allowed without the author's written permission.
Mahala, James, "Net Shore-Drift Along the Pacific Coast of Clallam and Jefferson Counties, Washington" (1985). WWU Graduate School Collection. 669.
Net Shore-Drift Clallam County Washington
Net Shore-Drift Jefferson Count Washington reduced 7272144.pdf (153 kB)
Net Shore-Drift Jefferson County Washington