Santa Clara River Fluvial Analysisby Jun Wang,
Ruh-Ming Li, (M.ASCE),
Abstract: The Santa Clara River watershed, located in Los Angeles County, has been subject to rapid increases in population and urban development, resulting in channelization, new bridges, and increased demand for utilization of aggregate resources in the area. A comprehensive assessment of the watershed and streams was required in order to establish a basis for developing a master flood and sediment control plan. Detailed evaluation of the watershed's hydrologic, hydraulic, and erosion/sedimentation characteristics was conducted through application of a three-level approach, consisting of qualitative, quantitative, and computer modeling procedures. The study included development of a movable bed sediment routing model to simulate the changing profiles of the stream bed due to the effect of erosion and sedimentation, analysis of floodplain development and sand and gravel mining impacts on the stability of the river, and formulation of technical procedures for design of flood control facilities. This multiple level approach proved successful in developing a thorough understanding of this complex watershed systems and aided in formulating a well-balanced resource management plan.
Subject Headings: Watersheds | Rivers and streams | Hydrologic models | Flood routing | Sediment | Computer models | Erosion | Model analysis | Hydraulic models | North America | California | Los Angeles | United States
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