针对DRASTIC模型存在的不足，综合考虑研究区水文地质特征和人类活动的影响，提出改进的地下水脆弱性指标体系，分别采用层次分析法（ AHP）、熵权法及AHP-熵权法对各指标赋权，建立改进的DRASTIC地下水模型。应用基于上述3种方法改进的模型对南京市江宁区中部地区地下水脆弱性进行评价，3种模型得到的脆弱性指数整体均呈现由中部向东北、西南方向逐渐降低的趋势，但不同模型中同一脆弱性区的面积有所差异；通过线性相关分析验证模型评价结果。结果表明，基于AHP-熵权法改进的DRASTIC模型评价结果较其他两种模型更客观真实地反映了研究区的实际情况。

A modified groundwater vulnerability assessment index system is proposed , with consideration of the deficiencies of the DRASTIC model , and the hydrogeological features and human activities in the study area .In order to establish this modified DRASTIC model , the indices of the system were weighted with the analytic hierarchy process ( AHP) method, the entropy weight method , and the AHP-entropy weight method .Modified models based on the three methods described above were applied to assessment of the groundwater vulnerability in the central area of the Jiangning District , in Nanjing City .The vulnerability indices obtained from the three models exhibited a deceasing trend from the central area towards the northeastern and southwestern areas , and the area with the same level of vulnerability varied in different models .The model results were verified with linear correlation analysis .The results show that the modified DRASTIC model based on the AHP-entropy weight method c

皖北平原是安徽省地下水开发利用程度较高的地区。依据国际上运用较广泛的DRASTIC指标体系,结合安徽省皖北平原的实际情况,构建该区域浅层地下水脆弱性评价指标体系,利用ArcGIS软件的空间分析功能评价该区域浅层地下水的脆弱性,绘制脆弱性分布图,评价结果可为该地区地下水资源保护和污染防治提供技术参考。

Groundwater is the important source of fresh water supply and has been exploited and utilized greatly in the North Anhui plain.DRASTIC model is one of the most widely used models for groundwater vulnerability assessment.To as-sess the unconfined groundwater vulnerability,DRASTIC method was modified in this study by reconstructing the parameter system according to the situation of North Anhui plain.The vulnerability map was drawn by the tool of ArcGIS and would be served as a scientific support for the groundwater protection in the study area.

以昆明市主要供水水源地松华坝水源保护区为例,收集水源地自然地理概况和水文地质资料的基础上,运用国内外广泛运用的DRASTIC指标法对水源地地下水脆弱性进行了评价。评价结果说明:松华坝径流区地下水系统脆弱性总体较差,容易受到人类经济工程活动的污染。

Songhuaba Water Source Protected Areas is the main source of water supply of Kunming City.Take Songhuaba Water Source Protected Areas as an example,collecting water natural geography and hydrogeological data,using the DRASTIC index method which widely used at home and abroad,the groundwater vulnerability evaluation was carried on.Evaluation results showed that the overall groundwater vulnerability of Songhuaba Water Source Protected Areas was poor,it was vulnerable to human economic and engineering activities of pollution.

目前许多地区的地下水因过度开采以及工业活动而受到了不同程度的污染,特别是在经济发达地区,由于化肥的过度使用,给地下水系统带来了严重威胁。本文结合典型案例研究区-江阴市地下水监测网络及其监测数据,应用AHP(层次分析法)对DRASTIC法各指标权重进行重新确定,并对案例区进行了地下水脆弱性评价。在此基础上,在DRASTIC指标体系中加入硝酸盐浓度因子作为特殊脆弱性影响因子,应用GIS空间分析功能得出研究区地形图。研究结果显示:研究区大部分地区属于较易受污染地区,少数地区不易受污染。脆弱性评价结果较好地符合了水质状况,在指导地下水资源规划以及生产活动具有一定的理论及实际意义。

The groundwater pollution in many regions is becoming more and more serious because of over -exploiting and industrial ac-tivities.Typically, the groundwater system in intensive planting area is facing with serious threat of pollution from over -using of fertilizer. In this paper , AHP ( Analytic of Hierarchy Process ) method was used to reset the weights of DRASTIC parameters referring to the conditions of intensive plantation in Jiangyin city and to evaluate the groundwater vulnerability .The results show that the groundwater in most of the study area was susceptible to pollution;A minor of area is less susceptible to the groundwater pollution .The evaluation results for groundwa-ter quality is consisted with the actually situation in study area .The work is helpful in guiding a theoretical and practical regulation for groundwater resource .

区域地下水系统防污性能评价,面临影响因子多又复杂、评价指标难以客观性选定和权重不易确定等难题,以至严重影响评价结果的可信性。本文以鲁北平原为例,在以往地下水脆弱性评价常用的DRASTIC模型基础上,采用创新的迭置指数方法,改进为"DRITCS法",选择地下水位埋深、包气带综合岩性、地表2 m内单层厚度大于0.5 m的粘土层厚、含水砂层厚度及其渗透系数、和地下水净补给量等因子,组成区域地下水系统防污性能评价模型。合理地确定了区域地下水系统防污性能评价中关键指标——包气带粘性土层变化影响,并在鲁北平原示范性应用和通过以面源污染为主的三氮污染现状验证的结果表明:本文提出的方法能够客观地反映流域性相变造成的地下水系统防污性能空间差异性和区位分布特征,具有较强的实用性。

In regional groundwater vulnerability assessment, the impact factors are multiple and complex, and hence it is difficult to determine the evaluation system and the weights of factors objectively. This problem has affected the credibility of the assessment results. Selecting the Northern Shandong Plain as the study area, the authors used innovative overlay and index method. The conventional DRASTIC model was improved and converted into DRITCS model to evaluate groundwater vulnerability. The evaluation factors of DRITCS model included the groundwater depth, integrated lithology of the aeration zone, thickness of clay layer with the thickness of a single layer over 0.5 m within 2 m of land surface, aquifer thickness, permeability coefficient, and net recharge. A key factor in groundwater vulnerability assessment was determined reasonably, which represented the changes of the clay layer in the aeration zone. The DRITCS model was used to evaluate the groundwater vulnerability in northern Sh