PROPOSAL OF EFFICIENT ANALYSIS METHOD FOR PADDY FIELD DAM FOR RIVER BASIN FLOOD CONTROL AND FIELD APPLICATION

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  • 流域治水に向けた田んぼダムの効率的解析法の提案と現地適用

Abstract

<p> Considering the increasing severity and frequency of water disasters due to the impact of climate change, it is necessary to develop a method that can efficiently and accurately evaluate the flood control effects of rice paddy dams, which are one of the watershed flood control measure. In this study, we proposed a new method that can easily consider the operation of drainage from rice fields, and introduced it into the comprehensive flood analysis model. Furthermore, we applied the method to the Karube River Basin in the Takahashi River system, and conducted numerical analysis for the August 2021 heavy rain assuming normal drainage and paddy dam operation. Analysis results clarified the effects of different drainage operations on the inundation status and depth of the paddy fields, and indicated that it was possible to examine the effects on farm management for each paddy field.</p>

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