河南嵩县伊洛河流域大型水库地质灾害综合评价——以陆浑水库为例

GEOLOGICAL HAZARD ASSESSMENT OF LARGE RESERVOIRS IN YILUO RIVER BASIN OF SONGXIAN,HENAN PROVINCE:A Case Study of Luhun Reservoir

水库是调查地质灾害的重要研究区域之一.伊洛河流域大型水库之一陆浑水库的主库区周边环境存在一定的地质灾害隐患.在嵩县地质灾害隐患调查的基础上,结合野外调查以及DEM数据,选取坡度、坡向、降雨量、植被覆盖率等评价指标,利用GIS模型对陆浑水库的主库区周边乡镇进行地质灾害易发性、危险性、风险性评价并划分地质灾害防治区.研究结果表明:研究区域划分为极高风险区面积约为14.7 km^(2),占比7.24%;高风险区面积约为45.29 km^(2),占比22.32%;中风险区面积约为99.13 km^(2),占比48.86%;低风险面积约为43.75 km^(2),占比21.56%.该研究可作为后续防灾减灾工作的基础,为陆浑水库的主库区及其周边的地灾防护工作提供科学依据.

Reservoir is one of the important research areas for geohazard survey.There are certain hidden dangers of geohazards in the surrounding area of Luhun Reservoir,one of the large reservoirs in Yiluo River Basin.Based on the geohazard survey in Songxian County,combined with the field investigation and DEM data,the evaluation indexes such as slope gradient,slope aspect,rainfall and vegetation coverage are selected,and GIS model is used for the susceptibility,danger and risk assessment of geohazards and zoning of prevention areas in the towns around the main reservoir area.The results show that the very high risk area is 14.7 km^(2),accounting for 7.24% of the study area;the high-risk area 45.29 km^(2),accounting for 22.32%;the medium-risk area 99.13 km^(2),accounting for 48.86%;and the low-risk area 43.75 km2,accounting for 21.56%.The study can provide scientific basis for subsequent disaster prevention and mitigation in the main reservoir area of Luhun Reservoir and its surroundings.