## 3 Case Study
### Results and Discussion
For the 13 Aug 2021 flood, the maximum discharge of the operating scheme formulated using the conventional operation rules was the largest, followed by the measured maximum discharge, while the maximum discharge of the operating scheme formulated using the DT-based rules was the smallest; the relative error between 1 and 2 was small (4.34%), whereas the relative error between 1 and 3 was large, reaching 72.41%. The maximum water level of the operating scheme formulated using the DT-based rules was the largest, followed by the measured maximum water level, while that of the operating scheme formulated using the conventional operation rules was the smallest; the relative errors between 1 and 2 and between 1 and 3 were both small (0.02% and 0.56%, respectively). It can be observed that the operating scheme formulated using the conventional operation rules was the best in terms of reservoir safety because its maximum water level was the smallest. However, this condition was the most unsafe downstream because the corresponding maximum discharge was the largest. The operating scheme formulated using the DT-based rules was the best in terms of downstream safety because its maximum discharge was the smallest. However, this condition exhibited the highest maximum water level, indicating that it was the worst operating scheme in terms of reservoir safety. The difference between the maximum water level provided by the operating scheme formulated using the DT-based rules and the measured maximum water level is very small, that is 0.01 m, and the maximum discharge of 580 m\({}^{3}\)/s is below the controlled discharge of 1000 m\({}^{3}\)/s, indicating that it is a feasible scheme. 4. For the 26 Aug 2021 flood, the maximum discharge of the operating scheme formulated using the conventional operation rules was the largest, followed by the measured maximum discharge, while the maximum discharge of the operating scheme formulated using the DT-based rules was the smallest; the relative error between 1 and 2 was small (0.32%), whereas the relative error between 1 and 3 was large, reaching 218.46%. The measured maximum water level was the largest, followed by the maximum water level of the operating scheme formulated using the DT-based rules, while that of the operating scheme formulated using the conventional operation rules was the smallest; the relative errors between 1 and 2 and between 1 and 3 were both small (0.09% and 0.14%, respectively). It can be observed that the operating scheme formulated using the conventional operation rules was the best in terms of reservoir safety because its maximum water level was the smallest. However, this condition was the most unsafe downstream because the corresponding maximum discharge was the largest. The operating scheme formulated using the DT-based rules was the best in terms of downstream safety because its maximum discharge was the smallest. The maximum water level provided by the operating scheme formulated using the DT-based rules were between those of the measured values and the operating scheme formulated using conventional operation rules. At the same time, the maximum discharge of 314 m\({}^{3}\)/s provided by the operating scheme formulated using the DT-based rules remained below the controlled discharge of 1000 m\({}^{3}\)/s, indicating that it is a feasible scheme. In summary, the operating scheme formulated using DT-based rules was shown to be feasible and, in some cases, better than the actual operating scheme and a scheme formulated using conventional operation rules.