达川区暴雨洪涝灾害风险区划

Storm and flood disaster risk regional division in dachuan district

利用四川省达州市达川区及周边25个国家气象站30年的气象资料和达川区社会经济数据,采用GIS系统分析达川区暴雨洪涝灾害致灾因子的危险性、孕灾环境的敏感性、承灾体易损性与防灾抗灾能力,对达川区暴雨洪涝灾害进行了统计和区划。结果表明,达川区各地的暴雨洪涝风险主要受地形地貌、洪涝频率、人口分布、经济发展程度等多种因素影响。高敏感风险区主要有达川南城(主城区)、永进-石桥、道让-虎让-桥湾-石梯和景市等乡镇,次敏感区主要有赵家、百节(铜钵河两岸)、亭子、麻柳-万家-大树、东兴-黄都-南岳、双庙、罐子、龙会、堡子-赵固、洛车、五四-银铁等乡镇,这是达川区防汛减灾的重点区域;中度敏感区主要包括河市-金垭、福善、大滩、管村-九岭-陈家-渡市、香隆-沿河等乡镇,次低或低敏感区主要包括海拔较高、离河流较远的低山高丘区。

The meteorological data in Dachuan district and 25 national weather stations surrounding Dachuan district for 30 years and the socio-economic data of Dachuan district were used.The GIS system was used to analyze the hazards of storm-flood and flood-caused factors in Dachuan district,the susceptibility of pregnancies,the vulnerability of disaster-affected bodies,and the ability to prevent and fight disasters.Statistics and regional division were conducted on the storm-flood disasters in Dachuan district.Storms and floods were counted and zoning in the Dachuan district.The results showed that the risk of storm floods in Dachuan district was mainly affected by various factors such as topography,landslide frequency,population distribution,and economic development level.Highly sensitive risk areas included the south Dachuan district(main city zone),Yongjin-Shiqiao,Daorang-Hurang-Qiaowan-Shiti and Jingshi.And the sub-sensitive areas mainly included the Zhaojia,Baijie,Tingzi,Maliu-Wanjia-Dashu,Dongxing-Huangdu-Nanyue,Shuangmiao,Guanzi,Longhui,Baozi-Zhaogu and Luoche,Wusi-Yintie and other towns,which were the key areas for flood control and disaster reduction in Dachuan district.Moderately sensitive areas mainly included Heshi-Jinya,Fushan,Datan,Guancun-Jiuling-Chenjia-Dushi,Xianglong-Yanhe towns.The sub-low or low-sensitivity areas mainly included low mountain and high hill areas with higher elevations and further away from the river.