Zunyi City Karst Groundwater Quality Evaluation Studies

The prominent geochemistry vulnerability and environment frangibility in GuiZhou karst region is representative in the world. And the groundwater there is mainly used for drinking. As standard of living advanced, humans request more to water quality. In a given region, the number 6i water not only lie on the quantity but also on quality. Comprehensively evaluate groundwater in karst area is beneficial to exploit groundwater reasonably, protect water resource effectively and father polluted groundwater.In this paper, comprehensive index method and fuzzy complex method be used in groundwater quality evaluation to Zunyi karst area, and researched groundwater quality there. Finally, some conclusions were obtained as the following:(1) After field research and collection of information, comprehensive index method and fuzzy complex method were used synchronously in groundwater quality evaluations to Zunyi karst area. The groundwater quality level of monitoring points in different aquifers was assessed and analyzed.(2) According to analysis of water chemistry forms, some elements and matters exceed the standards. Date indicate the groundwater was being polluted in some way.(3) The results of evaluation in two methods are consistent. In sum, all of the two methods are precise, based enough theory and are apply to groundwater quality evaluation.(4) Compare with comprehensive index method, fuzzy complex method is better to be used in groundwater quality evaluation in karst area. Because comprehensive index method tend to assess the object to one or the other.(5) According to the evaluation results, a groundwater quality evaluation sketch hasbeen drawed.