山地流域における出水と土砂流出(2) ―穂高砂防観測所の観測結果―

Abstract

The authors carried out some observations on tlse runofl sediment yield and transport ina small mountain watershed, called Hirudani Experimental Watershed, which is a tributary of theJintsu River in Gifu Prefecture, Japan. This paper presents some results of the observations onrunoff characteristics, rate of sediment yield and transport on each classification of rocks in thesediment and transport, and changes in water qualities during floods. By using these results, the authors consider as follows:-1) The conductance of flood water is an indicator of the component of runoff.2) The quantity of sediment yields and transport discharge are limited during the period ofthe observed runoff.3) The characteristics of transport materials reflect the runoff processes over the sedimentsource areas.