Debris flow on the gully channel in a large-scale landslide

大规模山体滑坡沟道泥石流

• 批准号: 05660159
• 负责人: TSUCHIYA Satoshi
• 金额: $ 1.34万
• 依托单位: Shizuoka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05660159/
• 关键词: debris flow; large-scale landslide; critical rainfall; debris hydrograph; 土石流ピーク流量; 土石流総流出量

The aim of this study is to understand quantitatively the characteristics of debris flow which occurs in the large-scale landslide, e.g.the scale, the mode of flow down and the critical rainfall. In this study, we selected Ohya landslide as a observed field and obtained four hydrographs of debris flow which occurred in heavy rainfall from 1993 to 1994. The discharge of debris flow rose rapidly as the intensity of rainfall per 10 minutes, and after rainfall abruptly dropped down.From observed hydrogaphs the following results are quoted :(1) The relationship between the peek discharge of debris flow and the rainfall intensity may have a linear relation.(2) Also the relation between peek discharge and the total discharge has a linear on a log scale.(3) The critical rainfall intensity for causing a debris flow is 7mm per 10minutes, 12mm per hour respectively.(4) The Peek discharge of flow rate ranges from 2 to 13 m^3/s and the total volume is from about 8000 to 80000 m^3.

本研究的目的是定量了解大型滑坡中发生的泥石流特征，如规模、流下方式和临界降雨量等。本研究选取大谷滑坡作为观测场，获得了1993年至1994年强降雨期间泥石流的4条水文过程线。根据水文观测，得出以下结果：（1）泥石流峰值流量与降雨强度之间可能存在线性关系。（2）峰值流量与总降雨量之间也存在线性关系。 (3) 引发泥石流的临界降雨强度分别为每 10 分钟 7 毫米、每小时 12 毫米。 (4) 峰值流量范围为 2 至 13 m^3/s总体积约8000～80000m^3。

项目成果

Satoshi TSUCHIYA: "Mechanism on the debiris flow at Ichinosawa valley in Ohya landslide" Japan Society of Erosion Control Engineers. 59-64 (1994)

Satoshi TSUCHHIYA：“Ohya 滑坡一之泽山谷泥石流的机制”，日本侵蚀控制工程师学会。

土屋智: "大谷崩「一の沢」における堆砂変動と砂礫流動の機構について" 砂防計画の基本土砂量に関する研究(砂防学会). 59-64 (1994)

Satoshi Tsuchiya：“大谷崩塌“Ichinosawa”中沉积物波动和砾石流动的机制”侵蚀控制规划的基本沉积量研究（侵蚀控制协会）59-64（1994）。

土屋智: "大規模崩壊地における砂礫流動の機構について" 新砂防. (発表予定).

Satoshi Tsuchiya：“论大规模滑坡中的砾石流动机制”Shinsabo（待提交）。