山地流域における出水と土砂流出 (6)

Abstract

The authors carried out some observations on the runoff of rain, sediment yield andtransport in a mountain watershed, called Ashiaraidani (7.2km2), which is a tributary ofthe Jintsu River in Gifu Prefecture, Japan.In this paper, the process and mechanism of sediment transport on the stream channelwere analyzed by petorological and grain-size classification of transported gravels for oneyear cycle at Hirudani experimental watershed (0.85 km2). The mechanism of occurrence and behavior of mud-debris flow were partially revealedthrough the field observation on variations of river bed, and the water balance of mud-debris flow at Ashiaraidani experimental watershed (6.5 km2).