Characteristics of Distribution and Ge-netic Mechanism of Acidic Groundwater in Zhuhai City
Acidic groundwater is a widespread water environment problem in southern China.The research on distribution characteristics and genetic mechanism of acidic groundwater has great scientific significance for the development and utilization of regional groundwater and the protection of water resources.211 groundwater samples in different aquifers in Zhuhai city were systematically collected,and the distribution and main genetic and influential factors of acidic groundwater were analyzed by the method of mathematical statistics and hydrogeochemistry.The results show that the groundwater is mainly acidic,with the pH from 3.24 to 8.23,and mostly between 6.06 and 6.52.The pH of groundwater increases with the decrease of the ter-rain.The alkalinity and acid neutralization ability of groundwater in most hilly platform areas are weak,and the acidity of groundwater is strong.The alkalinity and acid neutralization ability of pore phreatic water and pore confined water are relatively strong,and the groundwater is neutral.The acidity and alkalinity of ground-water in the study area are related to atmospheric precipitation,vadose zone medium,water-rock interaction,river and tidal action.The recharge of acid rain,acidic vadose zone medium,weathering and dissolution of silicate minerals in granite and terrigenous clastic rocks and the oxidative hydrolysis of sulfide minerals are the main genesis for the acidic groundwater.
acidic groundwatercharacteristics of distributiongenetic mechanismZhuhai city
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