著者

松本 直樹 和田 孝志 中谷 加奈 里深 好文 水山 高久

出版者

公益社団法人 砂防学会

雑誌

砂防学会誌 (ISSN:02868385)

巻号頁・発行日

vol.65, no.3, pp.3-11, 2012-09-15 (Released:2015-08-03)

参考文献数

19

被引用文献数

5

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Debris flow is composed of mixed-size gravel, and the grain size distribution and concentration of sediment strongly affects the flow behavior. To predict more accurate debris flows, we need a numerical model that considers mixed-size gravel and can describe sediment sorting. We propose a more accurate method for predicting mixed-size debris flow behavior, from torrents to alluvial fans. We combined a debris flow model that can describe sediment sorting with an integration model, and proposed an integrated model for mixed-size gravel. Applying this model, we simulated debris flow on a virtual watershed under different conditions of inflow sediment distribution. Our results showed that an integrated model for mixed-size gravel provide a more rational description of debris flow in torrents and alluvial fans than models of uniform-sized gravel.