AHP-DRASTIC: software for specific aquifer vulnerability assessment using DRASTIC model and GIS
AHP-DRASTIC: software for specific aquifer vulnerability assessment using DRASTIC model and GIS
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DOI：
10.1016/s1364-8152(03)00051-3
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发表时间：
2003-09
期刊：
影响因子：
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通讯作者：
D. Thirumalaivasan;M. Karmegam;K. Venugopal
中科院分区：
文献类型：
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作者：
D. Thirumalaivasan;M. Karmegam;K. Venugopal
已开发了一个软件包AHP-DRASTIC，以得出修正的DRASTIC模型参数的等级和权重，用于具体的含水层脆弱性评估研究。该软件与ArcView地理信息系统软件相结合，用于建立含水层脆弱性模型，以预测哪些地区比其他地区更有可能因地表或地表附近的活动而受到污染。一些DRASTIC模型参数的范围已被修改，以适应当地的水文地质环境。层次分析法（AHP）被用来计算DRASTIC模型中使用的所有参数的标准和子标准的评级和权重。AHP的输出为这些参数生成一个MS Access数据库，然后使用Avenue Access与ArcView接口。AHP-DRASTIC的目的是提供与地理信息系统接口的用户友好的图形用户界面，以估计用于含水层脆弱性评估的专题层的权重和等级。列联表分析表明，低脆弱性和高脆弱性类别中的所有威尔斯井的浓度分别小于10 ppm和大于10 ppm。地下水水质数据的验证模型和结果表明，DRASTIC特定脆弱性指数和硝态氮浓度之间有很强的相关性，在0.01水平的相关系数为0.84。
A software package AHP-DRASTIC has been developed to derive ratings and weights of modified DRASTIC model parameters for use in specific aquifer vulnerability assessment studies. The software is integrated with ArcView Geographical Information System (GIS) software for modelling aquifer vulnerability, to predict areas which are more likely than others to become contaminated as a result of activities at or near the land surface. The ranges of a few of the DRASTIC model parameters have been modified to adapt to local hydrogeologic settings. Analytic Hierarchy Process (AHP) has been used to compute the ratings and weights of the criteria and sub-criteria of all parameters used in the DRASTIC model. The output from AHP generates a MS Access database for these parameters, which is then interfaced with ArcView using Avenue Scripts. AHP-DRASTIC is aimed at providing user-friendly GUI interfaced with GIS for the estimation of weights and ranks of the thematic layers used for aquifer vulnerability assessment. Contingency table analysis indicates that all wells in low and high vulnerability category have concentrations less than 10 ppm and more than 10 ppm, respectively. The model is validated with groundwater quality data and the results have shown strong relationship between DRASTIC Specific Vulnerability Index and nitrate-as-nitrogen concentrations with a correlation co-efficient of 0.84 at 0.01 level.