基于GIS技术的沧州沿海地区风暴潮灾害承灾体易损性评估

Assessment of Vulnerability of Hazard Bearing Body in Cangzhou Coastal Areas for Storm Surge Disaster Based on GIS Technology

基于GIS和RS技术,以沧州沿海地区遥感影像,风暴潮灾害灾情特征和社会经济数据为支撑,从自然环境、社会经济、土地利用和防灾减灾能力4个方面选取指标,建立风暴潮灾害承灾体易损性评估模型。根据风暴潮的成灾特点和研究区的防灾能力,分情景评估沧州沿海地区风暴潮承灾体易损性。结果表明:黄骅镇、南大港管理区、国营中捷农场、南排河镇、新村回族乡、苏基镇和辛集镇的承灾体易损度达到较高以上等级,其中南排河镇和新村回族乡靠近海岸线,遭受风暴潮的可能性较高,应予以重点关注。其他地区易损度等级则相对较低,其中香坊乡承灾体暴露度较小,防灾能力较强,易损度风险最低。

Based on GIS and RS technology and supported by remote sensing images,storm surge disaster characteristics and the socioeconomic data of Cangzhou coastal area,the indexes were selected from four aspects,including natural environment,social economy,land use types and disaster prevention and reduction capacity,to establish the storm surge disaster bearing body vulnerability assessment model.According to the disaster characteristics of storm surge and the disaster prevention capability of the study area,the vulnerability of storm surge bearing body in the coastal area of Cangzhou was assessed by multi-scenario.The results show that the vulnerability degree of disaster bearing body in Huanghua town,Nandagang administrative district,state-owned Zhongjie farm,Nanpahe town,Xincun township,Suji town and Xinji town was higher and above level,among which Nanpahe town and Xincun township were close to the coastline,and they were more likely to suffer storm surge than other towns,which should be paid more attention to.In other regions,the vulnerability level was relatively low,and Xiangfang town had relatively low exposure to disaster body,strong disaster prevention ability,and the risk of vulnerability was the lowest.