Grays Harbor Estuary, Washington, Report 4, South Jetty Study. Hydraulic Model Investigation.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
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The outer 6000 ft sta 15000 to 21000 of the south jetty is degraded to or below the elevation of mean lower low water. About 4000 ft sta 11000 to 15000 was rehabilitated to el 15 mean lower low water in 1966. The existing comprehensive fixed-bed model of the Grays Harbor estuary was used to determine the effects within the limitations of the model of five plans for further rehabilitation of the deteriorated portion of the south jetty and two plans for reducing the length of the existing rehabilitated portion. Model tests were conducted to determine hydraulic, salinity, shoaling, and disperison characteristics, and surface flow directions for the longest rehabilitation and reduction plans 1 and 7, respectively. Intermediate jetty length plans 2 and 3 were subjected to hydrualic measurements and surface flow direction observations while plans 4, 5, and 6 were subjected to surface flow direction observations only. Model test results consist of tidal height, current velocity, and salinity measurements photographs of surface current directions shoaling patterns and rates in the entrance area and dye dispersion characteristics. Author
- Hydrology, Limnology and Potamology
- Marine Engineering