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Assessing Reservoir Reoperation Performances through Adapted Rule Curve and Hedging Policies under Climate Change Scenarios: Indepth Investigation of Case Study of Bhumibol Dam in Thailand |
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| รหัสดีโอไอ | |
| Creator | Khin Muyar Kyaw |
| Title | Assessing Reservoir Reoperation Performances through Adapted Rule Curve and Hedging Policies under Climate Change Scenarios: Indepth Investigation of Case Study of Bhumibol Dam in Thailand |
| Contributor | Areeya Rittima, Yutthana Phankamolsil, Allan Sriratana Tabucanon, Wudhichart Sawangphol, Jidapa Kraisangka, Yutthana Talaluxmana, Varawoot Vudhivanich |
| Publisher | Faculty of Engineering Mahasasakham University |
| Publication Year | 2565 |
| Journal Title | Engineering Access |
| Journal Vol. | 8 |
| Journal No. | 2 |
| Page no. | 179-185 |
| Keyword | reservoir performance, climate change, adapted rule curve, hedging policies, water balance model |
| URL Website | https://ph02.tci-thaijo.org/index.php/mijet/index |
| Website title | THAIJO Engineering Access |
| ISSN | 2730-4175 |
| Abstract | The adaptation measures on water resources management through the forecastbased dam and reservoir reoperation have been intensively introduced to reduce the persistence of disaster risk and enhance water supply reliability. In this study, reoperating the Bhumibol (BB) dam with adapted rule curve and hedging policy as well as modelling exercise with MIKE11 to generate series of reservoir inflow was conducted. Five periods of the projected inflow of BB dam were then generated; 20002020 (baseline), 20212040, 20412060, 20612080 and 20812099 based on the simulation of ECEARTH under RCP4.5. The water balancebased reservoir reoperation model for current and projected incidents was established using MATLAB Simulink Toolbox to explore the operational performances in terms of reliability, vulnerability and resiliency indices. The simulation results show considerable changes in the seasonal and annual patterns of reservoir inflow, which are key factors influencing the complexity and effectiveness of reservoir management in both the current and future operations. Additionally, the percentage increase in water storage after re-operating with all scenarios of adapted rule curve are not much deviated in comparison with the observed results. However, applying twopoint, threepoint, and zonebased hedging for reservoir reoperations exhibit high potential to significantly increase reservoir water storage in dry and wet seasons. The simulation results also show that even hedging policy provides good results in raising water storage in the reservoir. However, effectiveness of operational performance is apparently lower than those scenarios performed by adapted rule curve. All the performance indices for the future case signify level of incapability of dam operation system in meeting target water demand, which is worse than the current case due to the declined pattern of reservoir inflow. Therefore, optimal reoperation with optimizationbased approach is highly suggested in maximizing the multiple benefits of dam and reservoir systems and coping with climate variability. |
