Optimizing flood protection for Cypress Creek, Harris County, Texas.
Wilson, P.C., Jr.
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This paper describes the formulation of a flood damage reduction project for Cypress Creek in the San Jacinto River Basin in Harris County, Texas, U.S.A. The investigation was conducted in accordance with the planning guidance and hydrologic study guidelines of the U.S. Water Resources Council and the National Weather Service, supplemented by instructions and regulations of the U.S. Army Corps of Engineers. In developing the discharge - frequency curve, the computed Probable Maximum Storm discharge of 3,115 m3/s was assigned a return frequency of once in 10,000 years. The optimum plan is an improved channel to carry 40-year frequency flood flows under 1990 conditions of watershed development. This level of flood protection is expected to degrade over time, unless county officials are successful in their efforts to control future runoff to the creek.