基于GIS技术与DRASTIC模型的民勤盆地地下水脆弱性评价  

Groundwater vulnerability assessment in Minqin Basin based on DRASTIC model and GIS technology

作　　者：王建红 余启明[2] 李平平 

机构地区：[1]甘肃省地质环境监测院,甘肃省地下水工程及地热资源重点实验室,甘肃省环境地质与灾害防治工程技术研究中心,兰州730050 [2]石家庄经济学院水资源与环境学院,石家庄050031

出　　处：《兰州大学学报（自然科学版）》2015年第6期882-887,共6页Journal of Lanzhou University(Natural Sciences)

基　　金：河西走廊地下水动态调查评价(水[2012]02-065-006)

摘　　要：在研究区地下水资源评价的基础上,系统分析了其地质与水文地质条件,选取了对研究区地下水脆弱性影响最主要的7个因子,建立了DRASTIC地下水脆弱性评价模型.在利用GIS技术对各因子进行分级分析的基础上,对各因子分析结果进行加权叠加分析,得到了地下水脆弱性评价结果.结果表明:受地下水位埋深较浅、含水层介质较好、包气带中无厚层黏性土分布等的影响,地下水脆弱性总体较高,易遭受农业种植、生活污水及工业生产污水渗漏的污染.Based on the evaluation of groundwater resources in the study area, its geologica! and hydrogeological conditions were systematically analyzed, the 7 factors affecting the groundwater vulnerability mostly were selected, and the vulnerability assessment model of groundwater vulnerability in DRASTIC was established. On the basis of the analysis of the factors carried out by using the GIS technology, the results on the groundwater vulnerability assessment were obtained, which showed that the groundwater vulnerability there was generally high, because of the shallow groundwater level, the medium of the aquifer being good and no thick layer of cohesive soil being distributed in the aeration zone, thus easy to suffer from the pollution from agricultural planting, domestic sewage and industrial sewage leakage.

关 键 词：地下水脆弱性 DRASTIC模型 地理信息系统技术 民勤盆地 

分 类 号：P641.8[天文地球—地质矿产勘探]