OPTIMIZATION OF NEW FLOOD CONTROL METHOD USING MULTIPLE DRY DAMS CONSTRUCTED IN A SERIES

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  • 直列配置された流水型ダム群におけるカスケード型洪水制御方式の最適化の検討

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<p> A new flood control concept called ‘Cascade method’ which permits multiple dams around an upstream region in a river basin to overflow from their emergency spillways has been proposed. For the sake of simplicity, we assume a river basin in which multiple dry dams are constructed in a series where no water flows in from rain or tributaries other than main river upstream. In this study, under the condition of common reservoir capacities, the new flood control method permitting upstream dry dams to overflow except for a downstream dry dam is compared with the conventional one not to overflow in each dam. In addition, each optimum design high water discharge for two or three dry dams constructed in a series are investigated. As a result of this study, it is made clear that the new method is more effective than the conventional one, and uniform design high water discharge for each dry dam is practically appropriate in the Cascade method.</p>

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