Flood-Control Facilities for Unique Flood Problems

by Ralph F. Wong, (F.ASCE), Formerly Chief; Hydr. Sect., Engr. Div., Los Angeles Dist., U.S. Army Corps of Engrs., Los Angeles, CA (deceased),
Alfonso Robles, Jr., (M.ASCE), Chief; Hydr Sect., Engr. Div., Los Angeles Dist., U.S. Army Corps of Engrs., Los Angeles, CA,

Serial Information: Journal of the Waterways, Harbors and Coastal Engineering Division, 1971, Vol. 97, Issue 1, Pg. 185-203

Document Type: Journal Paper


The unusual climatic, hydrologic, topographic and physiographic conditions in southern California present and create many unique problems in connection with the design of facilities for flood-control. The unusual conditions include extreme concentration of seasonal rainfall and runoff, short-duration and high-peak storms, steep topographic gradients and unique combination of physiographic and cultural characteristics. Facilities include debris basins, concrete-paved channels, leveed earth channels with and without grade-control structures, and continuous single levees. Initially, concepts of design have been based on judgement and theoretical considerations with limited or no actual knowledge or experience on such problems. Later, some facilities have been designed with the aid of scaled model studies, but for the most part, prototype verification of simulated conditions for flood of design magnitude is awaited. However, behavior of structures with small flows, ranging from about one-third to one-half of design value, as well as indicated necessity for remedial measures, are presented.

Subject Headings: Floods | Hydraulic design | Continuous structures | Topography | Structural behavior | Flow measurement | Light rail transit | Connections (structural) | California | United States

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