An innovative approach of Drinking Water Quality Index—A case study from Southern Tamil Nadu, India
An innovative approach of Drinking Water Quality Index—A case study from Southern Tamil Nadu, India
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DOI：
10.1016/j.ecolind.2010.01.007
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发表时间：
2010-07
影响因子：
6.9
通讯作者：
S. Ramesh;N. Sukumaran;A. Murugesan;M. P. Rajan
中科院分区：
文献类型：
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作者：
S. Ramesh;N. Sukumaran;A. Murugesan;M. P. Rajan
本研究的目的是用尽传统的知名水质指数（WQI）方法的局限性，通过建议可靠的饮用水质量指数（DWQI）系统。在DWQI的开发方法上进行了轻微的修改，即参数分类，使用回归统计开发子指标和使用Min-Max算子的聚合函数。选择了22个水质参数进行质量评价。建议DWQI进行了比较，与传统的方法的算术DWQI和几何DWQI和评价的案例研究。从印度泰米尔纳德邦南部采集的24个地下水样品的数据集，以说明该指数的应用和可行性。案例研究的结果显示，算术DWQI分数高于建议和几何DWQI，而几何DWQI分数低于建议DWQI分数。各指标间相关性良好（r ≥ +0.98）。DWQI算术评分与其他指标比较差异有显著性（P <0.001），DWQI几何评分与DWQI建议评分差异无显著性（P = 0.40）。不同形式的索引的比较表明，建议DWQI是最可靠的索引系统比其他人，减少了敏感性和重叠的问题，传统的索引系统。
The aim of the present study is to exhaust the limitations of conventional reputed Water Quality Index (WQI) methodologies through the proposed reliable Drinking Water Quality Indexing (DWQI) system. Slight modifications were carried out in the methodology of the DWQI development which were parameter categorization, development of sub-index with regression statistics and aggregation function with Min–Max operator. Twenty-two water quality parameters were selected for quality evaluation. The proposed DWQI was compared with conventional methodologies of arithmetic DWQI and geometric DWQI and evaluated with a case study. A data set of 24 ground water samples collected from Southern Tamil Nadu, India was made to illustrate the application and feasibility of the index. The results of the case study revealed that arithmetic DWQI scores were higher than the proposed and geometric DWQI while geometric DWQI scores were lower than the proposed DWQI scores. All the indices were well correlated (r≥+0.98) with each other. The arithmetic DWQI exhibited significant difference (P<0.001) with other indices but the proposed DWQI scores had insignificant variations (P=0.40) with geometric DWQI scores. The comparison of different forms of indices showed that the proposed DWQI was the most reliable indexing system than the others which diminished the sensitivity and eclipsing problems of conventional indexing system.