Accession Number : AD0720547

Title :   Model Studies of Navigation Improvements, Columbia River Estuary. Report 2. Entrance Studies. Section 2. Fixed-Bed Studies of North Jetty Rehabilitation.

Descriptive Note : Technical rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS

Personal Author(s) : Herrmann,Frank A. , Jr. ; Simmons,Henry B.

Report Date : NOV 1966

Pagination or Media Count : 161

Abstract : The existing, comprehensive fixed-bed model of the Columbia River estuary was used to determine the need for rehabilitating all or part of the outer end of the existing north jetty. This jetty has seriously deteriorated during the past 25 years, and a rehabilitation program has been undertaken. Model tests were conducted to determine the effects of various stages of repair of the outer 1800 ft of the jetty on the hydraulic, salinity, and shoaling characteristics of the entrance area. Test results consist of tidal elevation measurements, current velocity measurements, salinity measurements, photographs of surface and bottom current patterns, and shoaling patterns. (Author)

Descriptors :   (*BREAKWATERS, *HYDRAULIC MODELS), (*ESTUARIES, HYDRAULIC MODELS), RIVER CURRENTS, SALINITY, TIDES, SEDIMENTATION, DAMAGE CONTROL, TEST METHODS

Subject Categories : Hydrology, Limnology and Potamology
      Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE