2024 Volume 80 Issue 16 Article ID: 23-16073
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.
