2024 Volume 80 Issue 26 Article ID: 24-26024
In recent years, exacerbation of river disasters due to climate change has become a significant issue, and adaptation, including not only river channel maintenance but also watershed management, has been advocated. Paddy field dams have been recognized as excellent flood control elements, and methods for properly evaluating their effectiveness are being sought. This study examined the impact of both the total area of paddy fields and the condition of waterway networks on storage characteristics through laboratory experiments. Three types of paddy field models with different areas were used in the experiments to investigate the effects of the presence of paddy field dams and the complexity of waterway networks on runoff control. The results showed that while the outflow from paddy fields is effectively suppressed by paddy field dams, the storage capacity of waterway networks decreases. Additionally, it was demonstrated that the more complex the waterway network, the greater the increase in storage capacity within the network.
