| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| 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.
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