白龙江流域甘肃段地质灾害特征

Characteristics of Geo-hazards at Gansu Segment in Bailongjiang River Basin

根据1∶5万地质灾害详查资料,利用GIS技术,统计分析了白龙江流域甘肃段地质灾害的分布规律和发育特征,同时分析了其分布与地形地貌、地层岩性、地质构造和人类活动等因素的关系。结果表明:地质灾害主要沿河流和道路呈线状分布,受坡度、河流、构造断层、地层岩性和土地利用类型等因子的综合控制作用较大,随着坡度、距河流和断层距离的增大,地质灾害数量和密度大体呈减小趋势,人类活动显著影响着地质灾害的发育程度。

According to 1∶ 50,000 detailed geological disasters investigation information,the authors analyzed the characteristics and distribution regularities of geological disasters by GIS technology and analyzed the relationship among the geological disasters and the influence factors including landform,stratum lithology,geological structure,human activity etc. The results showed that the geological disasters were mainly distributed along with rivers and roads,and influenced by slope gradient,rivers,faults,stratum lithology and land use types in a large extent,and with the increasing of slope gradient,the distance to the rivers and faults,the numbers and density of geological disasters showed a decreasing trend,especially human activity significantly affected the growth degree of the geological disasters.