荒廃山地とくに地すべり流域からの雨水流出の特性

概要

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The landslide area, Okimi landslide, is situated in Kamiya District, Maki Village, Higashikubiki County, Niigata Prefecture, Japan, and is a typical devastated forest land caused by landslides. In this paper, in order to provide basic knowledge for water balance in a landslide area as one type of forested area, the outflow characteristics of two watersheds are investigated. The runoff addition and reduction curves are derived through recording the waterstage of the measuring notch during three water years as the hydrograph from two watersheds. In addition, the change of electronic conductivities for both A and B watersheds is obtained by the data from the field observation. The results lead us to the conclusion that (1) in the devastated area, there is the possibility of recording a large value of runoff compared with the input data as the precipitation, (2) by using the electronic conductivity value, the inflow through the ground water route to this watershed from the other watersheds is included.
日本雨水資源化システム学会の論文