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Prediction of Deep-Seated Landslide Sites on the Basis of Hydrogeomorphological Study

基于水文地貌研究的深部滑坡地点预测

基本信息

批准号：
10556034
负责人：
SHIMOKAWA Etsuro
金额：
$ 7.49万
依托单位：
Kagoshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2000
项目状态：
已结题

项目摘要

A deep-seated landslide occurred at Izumi City in northwestern Kagoshima Prefecture on July 10,1997. The purpose of this study is to prepare a practical map for predicting high potential deep-seated landslide sites on the flank of the old volcano of Mt. Yahazu-dake. The mechanism of this landslide, and the geological and hydrogeomorphological characteristics of the landslide slope sites are examined based on field study. The results are as follows :1. In the hydrological observatories installed in the basins of Mt. Yahazu-dake, discharge, temperature, and electrical conductivity of the stream water were measured continuously. Although these basins are located in the same flank, the runoff characteristics changes with the rates of gentle slope, the degree of weathered rocks, and the degree of dissection, etc.2. We measured the base flow, water temperature, and electrical conductivity at 17 streams around Mt. Yahazu-dake. Those values depend on the spatial distribution of gentle slope and deeply weathered rocks, and the degree of dissection.3. The discharge of groundwater at the foot of the hillslope where the landslide occurred were measured. The peak of groundwater flow is several hours behind the peak of rainfall. This result is harmony-like as the time of landslide in July, 1997.4. Base flow and electrical conductivity for every altitude at the streams around Mt. Yahazu-dake were measured. Consequently, these values changed at the altitude of the deep-seated landslide scar.The discharge and electrical conductivity of stream are the important factors in predicting the potential deep-seated landslide sites.

1997年7月10日，鹿儿岛县西北部出水市发生深部山体滑坡。本研究的目的是编制一张实用的地图，用于预测老火山侧翼的高潜在深部滑坡遗址。雅加祖达克。在野外研究的基础上，对该滑坡的形成机制和滑坡坡地的地质、水文地貌特征进行了研究。研究结果如下：1.在安徽省山口流域的水文观测站上。连续测量溪水雅哈兹度、流量、温度和电导率。虽然这些流域位于同一侧翼，但径流特征随着缓坡率、岩石风化程度、解剖程度等的不同而变化。我们测量了山丘周围17条溪流的基流量、水温和电导率。雅加祖达克。这些数值取决于缓坡和深度风化岩石的空间分布以及解剖程度。对滑坡发生的山坡脚下地下水流量进行了测量。地下水流的峰值比降雨量峰值晚几个小时。这个结果就像1997.4年7月的山体滑坡一样和谐。山周围溪流各海拔高度的基流量和电导率。对雅加祖达克进行了测量。河流流量和导电性是预测潜在深部滑坡点的重要因素。