Development of an Efficient Flood Control Method Using Multiple Dry Dams Constructed in Series

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420526
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Hydraulic engineering
• Research Institution: Saga University (2015); Kyushu University (2013-2014)
• Principal Investigator: Oshikawa Hideo 佐賀大学, 工学(系)研究科(研究院), 准教授 (80311851)
• Co-Investigator(Kenkyū-buntansha): KOMATSU Toshimitsu 九州大学, 大学院工学研究院, 特命教授 (50091343)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 流水型ダム / 洪水制御 / 河道内遊水池

Outline of Final Research Achievements

A new flood control method which permits dams to overflow around an upstream region with a sequence of dams constructed in a river was proposed. Multiple small scale dry dams should be constructed in series instead of a large scale dam in order to prevent flood disaster and preserve the natural environment. Recently a flood control dam with a bottom outlet hole as its regular spillway, known as ‘dry dam’, has been constructed in Japan. Under a condition of a common reservoir capacity, the new method permitting upstream dams to overflow except for the most downstream dam was compared with a conventional one not to overflow each dam. As a result, it was made clear that the new method using dry dams is much more effective than the conventional one. In this connection, the new method can be applied to normal storage dams with slide gates operated. Therefore, it could become an effective adaptation method for the global warming problem.

Free Research Field

水工学