贵州省织金县地质灾害危险性区划研究

Risk Regionalization of Geological Hazards in Zhijin County,Guizhou Province

选取贵州省织金县为研究区域,基于GIS的空间分析功能,结合遥感技术,利用信息量模型法建立了织金县地质灾害危险性综合评价模型.筛选出地形地貌、地质岩性、植被覆盖状况、河流水系、工程道路、土地利用程度6大因素,对织金县地质灾害进行定量分析并划分出离散区间.其中,高危险区面积842.647 km2,占29.38%,中等危险区面积1 052.96 km2,占36.71%,较低危险区面积663.289 km2,占23.13%,低危险区面积309.104 km2,占10.78%.与实际情况对比取得了较高的吻合度,区划结果能够为织金县的地质灾害治理提供依据.

： Based on the spatial analysis of GIS and remote sensing, an information amount model is built to evaluate the geological hazards in Zhijin county, Guizhou province. Six factors are selected to quantitative analysis and discrete intervals division： landform and physiognomy, geologic lithology, NDVI, distance to rivers, distance to roads, land use. In which, 842.647 km2 as highrisk area accounts for 2938%, 1 052.96 km2 as midrisk area accounts for 36.71%, 663.289 km2 as lowerrisk area accounts for 23.13% and 309.104 km2 as lowrisk area accounts for 10.78%. In comparison with actual situation, it has achieved a high degree of agreement. The result could be used as referential basis for geological hazards control in Zhijin county.