Estimating watershed-scale storage change and storage capacity based on high-frequency river discharge monitoring data

2014 Fiscal Year Final Research Report

• Project/Area Number: 24760388
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Hydraulic engineering
• Research Institution: Fukushima University
• Principal Investigator: YOKOO Yoshiyuki 福島大学, 共生システム理工学類, 准教授 (90398503)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 貯留量 / 河川流量 / 成分分離 / 土砂災害 / 逆推定 / 降雨流出 / モデリング / システム

Outline of Final Research Achievements

The present study attempted to incorporate the method for estimating watershed-scale storage change suggested by Kirchner (2009) with the filtering method for hydrograph separation suggested by Hino and Hasebe (1984), so that we can apply the Kirchner’s storage change estimation method even in watersheds with complex rainfall-storage-discharge processes. The result showed that the incorporation allowed better estimation of watershed-scale storage change in such watersheds, compared to the original method in Kirchner (2009). Our improved method also succeeded identifying dominant rainfall-storage-discharge processes within a watershed. In addition, this study found that our improved method is applicable in estimating slope-failure potential both in Japan and Thailand as well as storage-discharge mechanism of Cs-137 in drainage areas of sewage systems in Fukushima prefecture.

Free Research Field

流域水文学