摘要
采用遥感解译结合地面调查的方法,对冕宁县地灾隐患点的发育特征及形成条件进行了分析。结果表明:全县共发育有129处地质灾害,其中泥石流和滑坡发育数量最多,分别达到71处和54处;灾害规模多为中小型;灾害在时间上具有群发性,多分布于雨季;在空间上,主要分布于安宁河和雅砻江流域;各种因素对地灾形成的影响不一,地形地貌、地质构造、岩土体类型、坡体地质结构及形态是主要影响因素,暴雨则是地灾爆发的主要诱因。研究结果可为该区域地质灾害的防治、监测和预测提供依据。
The developmental characteristics and forming conditions of geological disasters were analyzed based on field investigation and remote sensing interpretation in Mianning County. The results showed that： （1） 129 different types of geological disasters developed in this area totally, and the number of debris flow and landslide which up to 71 and 54 re- spectively was in a majority. （2） These disasters were small to middle--scale mostly and oc- curred mainly in rainy seasons in time--scale and in the watersheds of Anning River and Ya- long River in spatial--scale. （3） Factors showed different influences on the formation of ge- ological disasters, among which topography, tectonics, rock and soil structure, as well as the geologic structure and morphology of slop were main factors. Besides, rainstorm was the main inducing factor. These results would be useful to the monitoring, prediction and pre- vention of geological disasters in local area.
作者
曾贞
张志强
ZENG Zhen,ZHANG Zhi-qiang(Chengdu Center of Hydrogeology and Engineering Geology, Chengdu 610081,Chin)
出处
《地质灾害与环境保护》
2018年第1期17-22,共6页
Journal of Geological Hazards and Environment Preservation
关键词
冕宁县
地质灾害
发育特征
Mianning county
geological disaster
developmental characteristics
