Enhancing flood control strategies via reservoir system modeling: Case analysis of Rasi Salai and Hua Na Dams, Thailand

Effective reservoir management requires the ability to navigate the uncertainties of natural and human-induced factors, such as fluctuating rainfall, variable inflows, and evolving water demand. This study focuses on optimizing the operations of Rasi Salai Dam, Hua Na Dam, and That Noi Dam in the Mun and Chi River Basins to reduce flood risks in Sisaket and Ubon Ratchathani provinces, Thailand. By employing the HEC-RAS model, we developed a comprehensive simulation of the watershed, integrating data from key water measuring stations (M.5, M.7, M.9, M.182, and E.20A) collected between 2019 and 2022. The study modeled water retention and release strategies, comparing the efficiency of new rule curves against existing ones. Results indicate that the proposed model enhances the efficiency of flood management, demonstrating better water release control and coordination among the dams. The findings underscore the importance of integrated reservoir management in mitigating flood risks and ensuring sustainable water resources for the region.