九甸峡库区地质灾害分布规律及发展趋势

发布时间：2018-11-25 16:43

【摘要】：水库蓄水对库区地质灾害的发育有着重要影响,蓄水过程中库水位及侵蚀基准面的抬高等变化将会对库区地质灾害的发育起到了重要影响。为保障九甸峡水利枢纽的顺利建设和建成后的正常运营,以九甸峡库区为例研究库区地质灾害的分布规律及其水库蓄水后的发展趋势。基于对库区的详细的勘察资料的基础上,对库区地质灾害进行了系统地分析和评价。研究表明:蓄水后,库区沿岸产生多处库岸滑塌和小规模的新滑坡等灾害,塌岸宽度为50~100m,主要分布于洮砚以上的河段;库区浅层和深层滑坡共39处,蓄水初期库水位抬升诱发和加速了滑坡的变形破坏,蓄水后,大部分滑坡位于库水位之下或远高于库水位,受库水影响较小;蓄水对库区内滑坡的发育影响较大,对原有泥石流沟发育影响较小,泥石流沟的发育主要由降雨引起。
[Abstract]:Reservoir water storage has an important impact on the development of geological disasters in the reservoir area. The changes of reservoir water level and elevation of erosion datum will play an important role in the development of geological disasters in the reservoir area. In order to ensure the smooth construction and normal operation of Jiudian Gorge Water Control Project, the distribution law of geological hazards and the development trend of the reservoir after impoundment are studied by taking Jiudian Gorge Reservoir as an example. Based on the detailed survey data of the reservoir area, the geological hazards in the reservoir area are systematically analyzed and evaluated. The results show that: after impounding, there are many disasters such as bank collapse and small scale new landslide along the bank of the reservoir area. The width of bank collapse is 50 ~ 100m, which is mainly distributed in the river section above Tao inkstone. There are 39 shallow and deep landslides in the reservoir area. The uplift of reservoir water level induces and accelerates the deformation and destruction of the landslide in the early stage of water storage. After storing water, most landslides are located below or far above the reservoir water level, and are less affected by reservoir water. Water storage has a great influence on the development of landslide in the reservoir area, but it has little effect on the development of the original debris flow ditch, and the development of the debris flow ditch is mainly caused by rainfall.
【作者单位】：上海交通大学船舶海洋与建筑工程学院;河南大学生命科学学院;河南大学环境与规划学院;河南大学黄河中下游数字地理技术教育部重点实验室;
【基金】：国家自然科学基金“风蚀对锡林郭勒草原土壤有机碳流失的影响研究”(41401107)
【分类号】：P694

【相似文献】