云南省宾川县地质灾害发育特征及形成条件

Geological Hazards Characteristics and Formation Conditions in Binchuan County,Yunnan Province

分析了云南省宾川县地质灾害发育特征及形成条件。结果表明，宾川县发育地质灾害主要类型有滑坡、泥石流、不稳定斜坡等。该地区地质灾害的发育在时间和空间上都有一定的规律：多发生于陡坡、陡崖地形区;多发于雨季比较集中的6~9月;多发育于人类工程活动强烈的地区；各类地质灾害的规模均以中小型为主。该区的地质灾害与地形地貌、地层岩性及构造、植被覆盖、降雨、地震、人类活动等有密切关系，且近年来人类活动是地质灾害频发的主要原因之一。该地区地质灾害影响因素的主次关系为：岩组结构〉地形坡度〉人类工程活动〉灾害点发育密度〉降雨量〉地震〉地质构造〉地表水系〉植被覆盖率。

The characteristics of geological disasters and formation conditions in Binchuan County, Yunnan Province were analyzed. The geological disasters in Binchuan County mainly included landslides, mudslides, unstable slopes. The development of geological disasters in the region in terms of time and space had certain rules： occurred in steep, cliff terrain areas; mainly concentrated in the rainy season during June-September; mainly developed in human engineering activities more intense region ; various types of geological disasters were small or medimn size. Geological disasters in this area were closely related to topography, lithology and structure, vegetation cover, rainfall, earthquakes and human activities. In recent years human activity was one of important reasons for frequent geological disasters. The order of factors influencing geological disasters in Binchuan was as following ： rock group structure 〉 topographic slope 〉 human activity 〉 hazard point development density 〉 rainfall 〉 earthquake 〉 geological structure 〉 surface water system 〉 vegetation cover rate.