流域地質構造が河床材料特性の流下方向変化に及ぼす影響

抄録

The present study is conducted for predicting tributary sediment flux in a river system with heterogenic topography, geology and lithology. Physicochemical characteristics of stream bed materials in the watershed area were clarified by analyzing field measurement of their topography and sediments and two kinds of laboratory experiments of these sediments by employing a concrete mixer and the X-ray fluorescence (XRF) spectrometer. We could relatively evaluate the amount of sediment supply from each tributary with the each size and element distribution of sediment (from sieving and XRF results) which was produced in its watershed contained various topography and geology in a river system.