基于GIS与DRASTIC模型的玉门市地下水脆弱性评价  

Evaluation of groundwater vulnerability in Yumen city based on GIS and DRASTIC models

作　　者：李平平 LI Ping-ping(Gansu province key laboratory of groundwater engineering and geothermal resources/geological environment monitoring institute of GanSu province,Lanzhou 730050,Gansu)

机构地区：[1]甘肃省地下水工程及地热资源重点实验室/甘肃省地质环境监测院,甘肃兰州730050

出　　处：《地下水》2023年第6期77-79,114,共4页Ground water

摘　　要：根据研究区水文地质和地质条件,结合DRASTIC评价方法,选取7个主要影响因素作为评价因子,经过ArcGIS叠加分析并结合DRASTIC脆弱性划分原则,将脆弱性指数分成四个区。评价结果表明,研究区赤金盆地南部的老君庙镇和东北部的清泉一带地下水脆弱性较低,昌马洪积扇、境内北部的马鬃山一带以及花海盆地的大部分地区地下水脆弱性中等,南部祁连山前、中部的赤金盆地及三墩滩—红泉河坝一带地下水脆弱性较高,西部的下西号乡—黄闸湾乡—饮马农场一带地下水脆弱性高。评价结果为研究区水资源管理、水环境保护提供了科学依据。According to the hydro-geological and geological conditions of the study area,combined with the DRASTIC evaluation method,seven main influencing factors were selected as evaluation factors,and the vulnerability index was divided into four zones after ArcGIS overlay analysis and combined with the DRASTIC vulnerability division principle.The evaluation results show that the study area has low groundwater vulnerability around Laojunmiao Township in the southern part of Chijin basin and Qingquan in the northeastern part of the study area,medium groundwater vulnerability around Changma floodplain fan,horsehair mountain in the northern part of the territory,and most of Huahai basin,high groundwater vulnerability in the front of Qilian mountains in the southern part,Chijin basin in the central part of the study area and along the area of Sanduntan-Hongquanheba,and high groundwater vulnerability along the area of Xiaxihao Township-Huangzhawan Township-drinking horse farm in the western part of the study area.

关 键 词：地下水脆弱性 DRASTIC模型 GIS技术 

分 类 号：P641.8[天文地球—地质矿产勘探]