Key factors for flood control operation

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Tae Jin Kim

Daegu University, South Korea

: J Hydrogeol Hydrol Eng

Abstract

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The monthly time step Water Rights Analysis Package Model (WRAP) is one of the components in the Texas Water Availability Model (WAM) system. Sub-monthly time step capabilities to conventional WRAP based on the monthly time step has been added. In this study, focus was given to key variables for simulating sub-monthly time step WRAP as follows: Disaggregation of monthly inflow and routing parameters computation. The daily flow pattern method was utilized for disaggregating Brazos River Authority Condensed (BRAC) monthly inflow and routing parameters based on length are computed. The USACE Southwestern Division Reservoir System Simulation Model (SUPER) model daily unregulated (naturalized) flows from 1939 to 1997 were used to develop daily flow patterns for disaggregating BRAC monthly inflows. The mean values of the daily naturalized flow for 1939 to 1997 were used as the flow pattern for 1900 to 1939 and 1998 to 2007. Also, these daily flow patterns were distributed to the other ungagged control points. The lag times at control points of the BRAC data set were computed based on the distance of the reaches with consideration of the lag time computed using the SUPER daily naturalized flow. The Muskingum routing parameters (K) were also computed based on the distance of the reaches. The key variable evaluated in this study provides a sufficient level of accuracy for using the model in flood control operations for a multiple-reservoir system. However, further refinements are possible by spending more time and effort to compile more detailed data.

Biography

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Tae Jin Kim has been involved in various aspects of water and environmental fields, including watershed management, water availability, river basin hydrology and management of river/reservoir system and optimization. His specific fields are watershed protection plan focused on surface runoff, base flow and salinity, urban stormwater management focused on food and water pollutant, multiple reservoir system operation, optimization, decision support system and watershed flood management.