Lake Kemp Reallocation Study with RiverWare

John Daylor, P.E. (Tulsa District, Corps of Engineers)

   Lake Kemp is a main stem reservoir on the Wichita River in north central Texas. Lake Kemp provides water supply, flood reduction, and recreation. The city of Wichita Falls, Texas is downstream from Lake Kemp. Additional M&I supply is anticipated in the region to meet future demands and Lake Kemp has been identified as a source for helping meet these increased demands. Tulsa District Corps of Engineers will investigate alternatives for increasing yield from Lake Kemp by using RiverWare program. Proposed alternatives include reallocating portions of the flood control storage to additional conservation storage. Since alternatives involve reallocating as much as 36 percent of the flood control storage, an analysis of the reservoir as well as basin is required. Increased flood risks, yield determination, environmental, and cultural resource effects are areas of concern. A 79-year daily period of record rules based simulation approach will be used with RiverWare to obtain system results depicting existing condition and subsequent simulations for proposed alternatives. Results will be compared for making mitigation decisions. RiverWare’s SWD-CoE flood control balancing method is a system wide approach that provides solution based on downstream constraints and flood storage. Statistical functionality recently incorporated into RiverWare provides a tool for comparing results. RiverWare’s multi-run manager will be used to compute pool yield by cycling through the period of record to determine what yield will be sustained during historic drought, “critical dependable yield”.