抄録
The present study applied an estimation method of watershed-scale storage based on hydrograph separations and storage-discharge formulizations for exploring the relationship between watershed-scale storage and slope failures occurrences in a watershed. Firstly,we separated hourly discharge by the filter-separation autoregressive method into three to four different discharge sub-components. Secondly,we applied a storage-discharge formulization method to the discharge sub-components separately for estimating the watershed-scale"dynamic" storages under the slope failures occurrences. The results showed the estimated watershed-scale "dynamic" storages would be effective indicators of slope failures occurrences.In addition,we found the estimated watershed-scale storages for faster components were comparable with the Soil Water Index that is the current alert index of slope failures occurrences in Japan.
