Taking the groundwater system of Pingqiao Village in Zunyi as the research object,sampling and analy-sis were conducted at 27 groundwater monitoring sites during the wet season and dry season.According to relevant technical specifications,the groundwater quality was analysed and evaluated based on the manganese index.The wa-ter quality of the groundwater system during the dry season was better than that during the wet season.From up-stream to downstream,the degree of groundwater pollution gradually deepened,and the water quality at the groundw-ater outlet of subsystem(Ⅰ)was mainly Class V.Based on the distribution characteristics of manganese in the groundwater system,it was determined that the main sources of manganese pollution were the manganese-containing residue storage yard,the sewage collection pond,and the leachate recovery shaft of the factory.On the basis of the distribution characteristics of pollution sources in the groundwater system,the residue storage method,and the pollu-tion method,six pollution modes of manganese-containing pollutants around the factory were established,and the pollution characteristics were analysed and summarized.The migration pattern of groundwater manganese pollution around the factory was depicted.
维普
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