Accession Number : ADA194791

Title :   Sweetwater River Channel Improvement Project, San Diego County, California. Hydraulic Model Investigation.

Descriptive Note : Final rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS HYDRAULICS LAB

Personal Author(s) : Turner, Herman O , Jr

PDF Url : ADA194791

Report Date : Feb 1988

Pagination or Media Count : 69

Abstract : In the area of proposed improvement, the Sweetwater River is a poorly defined channel varying from 1,200 to 2,000 ft wide in a relatively broad floodplain. An entrenched trapezoidal channel with a base width of 320 ft has been excavated ending just upstream of a freeway bridge. This channel has a radius of 1,000 ft and turns approximately 80 deg in relation to the proposed channel alignment through the freeway bridge. A drop structure is to be located in the radius of the curve at the beginning of the project. A study of the proposed project was conducted using a fixed-bed constructed at a scale of 1:40 to study the effect of downstream waves and disturbances caused by the curvilinear flow conditions. The main objectives of the study were to obtain quantitative information on flow patterns, flow distribution, waves, and disturbances throughout the curved reach of channel, as well as to determine the effects of sediment buildup on water-surface elevations. The model study revealed that certain refinements are needed to the Sweetwater River project to eliminate potential problems. Keywords: Curved waterway channels; Curvilinear flow; Sediment wedge.

Descriptors :   *WATER FLOW, *RIVERS, *CHANNELS(WATERWAYS), ALIGNMENT, CALIFORNIA, CURVATURE, DISTRIBUTION, FLOOD PLAINS, HYDRAULIC MODELS, LINEAR SYSTEMS, PATTERNS, RADIUS(MEASURE), SEDIMENTS, WATER WAVES, WEDGES, WIDTH, EXCAVATION, DOWNSTREAM FLOW

Subject Categories : Civil Engineering
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE