Advances in Earth Science
1, Su Jie
1, Zhai Yuanzheng
2, Wang Jinsheng
Teng Yanguo, Su Jie, Zhai Yuanzheng, Wang Jinsheng. A Review on the Overlay and Index Method for Groundwater Pollution Risk Assessment[J]. Advances in Earth Science, DOI: 10.11867/j.issn.1001-8166.2012.10.1140.
Groundwater is a very important natural resource in many regions for water supply and development. However, groundwater pollution condition is becoming seriously due to the improper groundwater exploitation or surface contamination. In order to prevent the groundwater quality deterioration, groundwater pollution risk assessment as an important step in pollutioncontrol management, is used to determine the value of risk for quantitative or qualitative. Although groundwater pollution risk assessment has applied in many regions, but there is not a uniform definition. Therefore, a definition for groundwater pollution risk assessment should be proposed based on the review of the process of assessment. The overlay and index method play an important role in assessment, the assessment framework and the way to obtain the parameter in overlay and index method is also proposed. And the problems requesting further research are finally put forward.