Grays Harbor Estuary, Washington, Report 4, South Jetty Study. Hydraulic Model Investigation.
Abstract
The outer 6000 ft (sta 150+00 to 210+00) of the south jetty is degraded to or below the elevation of mean lower low water. About 4000 ft (sta 110+00 to 150+00) 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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1972
- Accession Number
- AD0749257
Entities
People
- Noble J. Brogdon Jr.