Accession Number : AD0720545

Title :   Model Studies of Navigation Improvements, Columbia River Estuary. Report I. Hydraulic and Salinity Verification.

Descriptive Note : Technical rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS

Personal Author(s) : Herrmann,Frank A. , Jr

Report Date : DEC 1968

Pagination or Media Count : 268

Abstract : The Columbia River estuary model was a combination fixed-bed and movable-bed model, constructed to scales of 1:500 horizontally and 1:100 vertically, and reproduced the lower 52 miles of the Columbia River and an adjoining portion of the Pacific Ocean. The model was equipped with the necessary appurtenances for accurate reproduction and measurement of tides, tidal currents, salinity intrusion, freshwater inflow, shoading distribution, and other significant prototype phenomena. The purpose of the model study was to determine and evaluate the effects of a proposed enlargement of the existing navigation channel from 35 by 500 ft to 40 by 600 ft, and to develop and evaluate various plans for the reduction of maintenance dredging coasts throughout the model area. Model verification tests indicated that the model hydraulic and salinity regimens were in satisfactory agreement with those of the prototype for comparable conditions. It therefore can be assumed that the model provided quantitative answers concerning the effects of the proposed plans on the hydraulic and salinity regimens of the estuary. (Author)

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

Subject Categories : Hydrology, Limnology and Potamology
      Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE