Application of the Probability Evaluation for the Seasonal Reservoir Operation on Flood Mitigation and Water Supply in the Chao Phraya River Watershed, Thailand
Daisuke Komori*, Cherry May Mateo*, Akane Saya*,
Shinichiro Nakamura*, Masashi Kiguchi*, Phonchai Klinkhachorn**,
Thada Sukhapunnaphan**, Adisorn Champathong**, Kimio Takeya***,
*Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
**Office of Water Management and Hydrology, Royal Irrigation Department (RID), 811 Samsen Rd, Dusit, Bangkok 10300, Thailand
***Japan International Cooperation Agency (JICA), Nibancho Center Building, 5-25 Niban-cho, Chiyoda-ku, Tokyo 102-8012, Japan
This research focuses on dam reservoir operation effective in flood mitigation and water resource reservation on a seasonal scale. Based on the relationship between discharge characteristics in the upper watershed of Chao Phraya River and flood occurrences in the lower watershed, it was clarified that the dam reservoir operation most effective in the rainy season was determining the lowest reservoir volume in August for the Sirikit Dam reservoir and in July for the Bhumibol Dam reservoir, and storing water until November. Furthermore, by the probability evaluation on the free reservoir capacities of both dams estimated from the predetermined lowest reservoir volume and inflow volume in both dams, the dam reservoir operation considering the importance of flood mitigation and water resource reservation on a seasonal scale can be achieved.
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