基于反距离权重法的寻乌县城区超标洪水淹没分析

Analysis of Exceeding Standard Flood in Xunwu County based on Inverse Distance Weight Method

文章以江西省寻乌县为例,利用反距离权重法插值分析了县城区遭遇50年、100年超标洪水时的洪水曲面,结合DEM数据分析了超标洪水淹没范围及影响人口。结果表明,在遭遇100年一遇洪水时,城区范围内受淹面积约2.46 km^(2),特别是城西居委会、城北村、三二五村、石圳村、小布村等行政村,是防御的重点。该方法实用性强、操作简便,分析过程中考虑最不利因素可满足超标洪水预案编制要求,可为快速编制城市或中小河流超标准洪水预案提供借鉴。

Taking Xunwu County of Jiangxi Province as an example,this paper analyzes the flood surface when the county urban area encounters 50-year and 100-year excessive flood by using inverse distance weight method,and analyzes the inundation range and affected population of excessive flood combined with DEM data.The results show that under the event of 100-years flood effect,the urban flooded area is about 2.46 km2.Especially the Chengxi neighborhood Committee,Chengbei Village,325 Village,Shizhen Village,Xiaobu Village,are the key protection area.This method is practical and easy to operate.Considering the most unfavorable factors in the analysis process,it can meet the requirements of over standard flood plan preparation,and can provide reference for rapid preparation of over standard flood plan for cities or small and medium-sized rivers.