苏北黄泛平原典型城市天然“海绵体”潜力评价体系

Potential evaluation of natural″sponge body″in a typical city of the Yellow River floodplain in northern Jiangsu

苏北黄泛平原地势平坦,浅部地层结构松散,可储水“海绵体”特征明显。为评价该区域“海绵体”雨水渗储潜力,以南部的江苏宿迁市区为例,在系统分析天然“海绵体”渗储能力主要影响因素的基础上,构建了天然“海绵体”雨水渗储潜力两级评价指标体系,借助层次分析法计算各指标权重,运用MapGIS进行综合评价。结果表明,废黄河漫滩区天然“海绵体”雨水渗储潜力较好,漫滩区以外区域渗储潜力一般或较差。

The Yellow River floodplain in northern Jiangsu is flat,with loose shallow stratum structure and obvious characteristics of″sponge body″for precipitation storage.In order to evaluate the precipitation storage potential of the″sponge body″in the region,taking Suqian urban area in the south as an example,based on the analysis of the main factors affecting the storage capacity of the natural″sponge body″,a two-level evaluation index system of the precipitation storage potential of the natural″sponge body″was constructed,and the weight of the index was analyzed by using the analytic hierarchy process,and finally the comprehensive evaluation of the index was carried out by MapGIS.The evaluation results show that the natural″sponge body″precipitation seepage potential in the floodplain area of the abandoned Yellow River is good,and the seepage potential in the areas outside the floodplain of the abandoned Yellow River is ordinary or poor.