| Summary: | 碩士 === 國立成功大學 === 水利及海洋工程學系 === 105 === This paper discussed how to increase the system water storage and improve the regulation ability to effectively utilize the water resources of the reservoirs and ponds in an irrigation district. It raised the utilization rate of the water resources in the area and developed the best combination of the improving strategies. In this study, both of the simulation and optimization analysis were applied to evaluate efficacy of the discrete and non-discrete improvement strategies. A generalized water resources simulation model, WRASIM, is used to simulate the water supply of the reservoirs in the irrigation district. The nonlinear programming method BOBYQA is used to optimize the minimum cost improvement strategy to increase irrigation water.
This study first constructed a combination strategy of the discrete improvement strategies, and then, under the specific annual average water deficit, the amount of the dredging of the reservoirs is optimized. The overall improvement strategy is developed with the minimum total development cost. The relationship between the increase in water supply and investment cost for different water shortages, for the best alternative under the limited budgets to improve the combination of alternatives to minimize the cost of irrigation water. The best strategy shows that for the annual average water deficit for the Hsinwha irrigation district is less than 11%, the minimum cost of the discrete combination strategy is to activate the Wuwayao Pond and install a new pump to increase the water supply to the 1st and 3rd rotation zone of Dayang set and the whole Kanding set. The other strategy is to apply pump to deliver water to the pipeline of the south branch of the Chianan ditch to irrigate Dapi set.
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