Evaluation and Hotspots Identification of Shallow Groundwater Contamination Risk in the Lower Reaches of the Liaohe River Plain  

下辽河平原浅层地下水污染风险评价及空间热点识别(英文)

作　　者：孙才志[1] 陈相涛[1] 陈雪姣[1] 

机构地区：[1]辽宁师范大学城市与环境学院,大连116029

出　　处：《Journal of Resources and Ecology》2016年第1期51-60,共10页资源与生态学报（英文版）

基　　金：National Natural Science Foundation of China(No.40501013);Specialized Research Fund for the Doctoral Program of Higher Education of China(No.20122136110003)

摘　　要：As a prerequisite for groundwater protection and contamination control, evaluation of groundwater con- tamination risk was the extension of groundwater vulnerability assessment. Based on disaster theory and using shallow groundwater of the lower reaches of Liaohe River Plain as the study area, we built an evaluation index system and a contamination index model for groundwater contamination risks from the perspectives of intrinsic vulnerability, external stresses, and functional value. We used data acquisition technology （remote sensing） and spatial analysis technology （GIS） to calculate the value of groundwater contamination risks. The spatial distribution of hotspots was obtained by calculating G index. Results show that groundwater contamination is above a mid-level risk in most of the study area. Areas with extreme high risk account for 37.86%, areas with high risk 32.47%, areas with moderate risk 12.07%, areas with light risk 3.17%, and areas with slight risk 14.43%. Hotspots areas are mainly located in central Shenyang City, northwest of Xinmin City, Beizhen City and Liaozhong County. Coldspots are mainly in Panjin City, Yingkou City, Dashiqiao City, Dawa County and Panshan County. The results reflect the spatial distribution and mechanism of groundwater contamination risk in the study area and provide relative references for land use planning and groundwater resource protection in the lower reaches of the Liaohe River Plain.地下水污染风险评价作为地下水保护与污染防治的重要前提,是在地下水脆弱性评价的基础上发展来的。本文以下辽河平原浅层地下水位研究主体,基于灾害理论,从本质脆弱性、外界胁迫性、价值功能性三个方面,构建了地下水污染风险评价的指标体系和污染指数模型。利用RS、GIS的空间信息采集与空间分析技术得出下辽河平原浅层地下水的污染风险分布图;在此基础上计算G指数得到地下水污染风险的冷热点空间分布图。结果表明:1研究区内地下水污染风险总体处于中度以上状态,其中高度风险区占37.86%,较高风险区占32.47%,中度风险区占12.07%,低度与较低风险区占17.6%。2研究区内热点区分布于沈阳市中部、新民市西北部、辽中县和北镇市;冷点区集中分布于南部的盘锦市、营口市、大石桥市、盘山县与大洼县境内。研究结果反映了研究区内地下水污染风险的空间分布与形成机制,为下辽河平原土地利用规划以及地下水资源保护提供相关参考。

关 键 词：lower reaches of the Liaohe River Plain groundwater contamination risk evaluation index system spatial hotspot analysis 

分 类 号：X824[环境科学与工程—环境工程] X523