天水市城区浅层地下水脆弱性评估  

Vulnerability assessment of shallow groundwater in urban areas of Tianshui city

作　　者：赵凯 周小龙 晏娟 ZHAO Kai;ZHOU Xiao-long;YAN Juan(The First Geological Investigation Institute of Gansu Bureau of Geology and Mineral Resources,Tianshui 741020,China)

机构地区：[1]甘肃省地矿局第一地质矿产勘查院,甘肃天水741020

出　　处：《地下水》2024年第1期81-84,共4页Ground water

摘　　要：地下水的脆弱性是指污染物到达含水层的难易程度,它反映在人类活动和自然因素影响下含水层系统抵御外部环境污染进入影响地下水质量的保护能力。天水市主城区位于渭河及支流藉河河谷,此区域内人口密集、工业发达,长期的工业生产活动会对河谷浅层地下会造成一定的污染,但区内未系统的对浅层地下水的脆弱性进行过评估,因此也无法确定在研究区内不同地段的浅层地下水系统抗污染的能力。本文在充分收集研究区水文地质、环境地质、气象水文等资料基础上,采用DRASTIC模型,对天水市城区浅层地下水的脆弱性进行了评估分区,为当地生态环境管理、城市规划及地下水开采利用等提供参考。经评估:研究区内大部分区域浅层地下水脆弱性级别为中等—高,防污性能差。The vulnerability of groundwater refers to the ease with which pollutants can reach the aquifer,and it reflects the ability of the aquifer system to protect itself against external environmental pollution that affects the quality of groundwater under the influence of human activities and natural factors.The capital city of Tianshui is located in the valley of the Weihe River and its tributary,the Xihe River,which is densely populated and industrially developed,and long-term industrial production activities will cause some pollution to the shallow groundwater in the valley,but the vulnerability of the shallow groundwater in the area has not been systematically assessed,and therefore it is not possible to determine the ability of the shallow groundwater system to resist pollution in the different segments of the study area.In this paper,assessing the vulnerability of shallow groundwater in the urban area of Tianshui City was zoned using the DRASTIC model with sufficiently collected data on hydro-geology,environmental geology,meteorology and hydrology in the Research area,so as to provide a reference for local ecological environment management,urban planning and groundwater exploitation and utilization.After assessment,the vulnerability of shallow groundwater in most areas of the study area is medium-high,and the pollution prevention performance is poor.

关 键 词：地下水脆弱性 DRASTIC模型 浅层地下水 天水市城区 ARCGIS 

分 类 号：P641.8[天文地球—地质矿产勘探]