浙江省滑坡地质灾害风险地图制图综合研究

Research on mapping of landslide geological hazard risk map in Zhejiang region, China

基于自然灾害风险制图自动综合的图层约束理论,结合模糊推理系统,从点状要素层面对浙江省滑坡灾害风险地图进行地图制图综合研究。以1995-2015年浙江省滑坡灾害数据为基础,根据浙江省滑坡灾害的特点,从致灾因子及孕灾环境角度考虑,选取滑坡灾害程度区划,地形坡度、地貌区划、年暴雨日数、多年均降水量作为制图约束图层。通过模糊推理系统对浙江省滑坡灾害风险进行综合评价,并以综合评价结果进行多尺度滑坡灾害风险地图制图综合。制图综合结果揭示了浙江省滑坡灾害高风险区—安吉、东阳、江山常山地区、丽水温州地区,且50%-60%的滑坡灾害集中在丽水温州地区。研究结果可以为浙江省滑坡灾害风险管理与决策提供科学参考依据。

Based on the layer constraint theory of automatic integration of natural disaster risk mapping, combined with fuzzy inference system, the map mapping comprehensive research is carried out from the point feature layer to the landslide disaster risk map of Zhejiang province. Based on the data of landslide disasters in Zhejiang province from 1995 to 2015, according to the characteristics of Zhejiang's landslide disasters, from the perspective of hazard factors and pregnancy environment, this article selects landslide hazard zone, terrain slope, landform zone, the annual rainstorm days and the average annual precipitation as the constraint layer. This article comprehensively evaluates the landslide hazard risk in Zhejiang province by the fuzzy inference system, and draws the multi-scale landslide hazard risk map with the comprehensive evaluation results. The comprehensive results of cartography reveal the high-risk areas of Zhejiang province-Anji, Dongyang, Jiangshan Changshan, Lishui Wenzhou, and 50%-60% of landslides are concentrated in Wenzhou, Lishui. The research results can provide a scientific reference for the risk management and decision-making of landslide disasters in Zhejiang province.