Spatial evaluation of sediment production rates by grain size based on topographical, geological and soil features in mountainous watersheds

在这项研究中，悬浮泥沙输运进行了实地观测，以评估细泥沙生产率在上游网站的仙台河流域。并对Kakuto盆地的土壤特征进行了制图，以确定细颗粒沉积物的优势产区。根据这些观测结果，明确了仙台河上游最主要的分支--初木河流域是一个产沙率相对较高的地区，而大口河流域南部则处于沉积趋势。此外，在空间尺度上的面积分类的可能性相媲美的小流域的基础上土壤的基本成分。

In this study, field observations on suspended sediment transport were carried out to evaluate fine sediment production rates in upstream sites of the Sendai River basin. And mapping of soil characteristics in the Kakuto Basin were carried out to detect dominant producing areas of fine sediments. As a result of these observations, it is clarified that the Hatsuki River basin, the most major branch of the upper Sendai River, is an area of a relatively high sediment production rate and that the southern part of Okuchi basin is on a depositional trend. In addition, a possibility of area classification on the space scale comparable to small watersheds based on elementary composition of soil is indicated.