【摘 要】
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The quality changes of shallow groundwater from karst hilly areas in Guiyang region of China impacted by the urbanization were investigated. The results show th
【机 构】
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Institute of Environment and Resource,State Key Laboratory of Environmental Geochemistry
论文部分内容阅读
The quality changes of shallow groundwater from karst hilly areas in Guiyang region of China impacted by the urbanization were investigated. The results show that the major ions in shallow groundwater from the karst hilly areas are mainly composed of HCO3 , SO42 , Ca2+ and Mg2+, and the concentrations scopes of NO3 , Cl , K+ and Na+ of the groundwater in agricultural, residential and industrial areas are 4.5-9.6, 2.8-7.1, 3.9-6.3 and 2.5-4.9 times higher than those in the forest areas, respectively. The concentrations of As, Pb and Cd of shallow groundwater in the industrial areas are also significantly enhanced, followed by those in the residential areas and the agricultural areas. The concentrations of NO3-, SO42-, As, Pb and Cd of the groundwater in the industrial areas and those of NO3 , SO42 , As and Cd of shallow groundwater in the residential areas reach grade III of the Groundwater Quality Standard of China (GB/T 14848 93), while the concentration of NO3- in the groundwater from the industrial areas exceeds grade V. With the process of urbanization, NO3 is the key factor to influence the groundwater quality in karst hilly areas, followed by SO42 , As, Pb and Cd.
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