CHEMICAL CHARACTERISTICS AND EVOLUTION PROGRESS OF THE PORE-WATER IN KUNMING BASIN
YE Xu-chun1, ZHANG Shi-tao1, MO Mei-xian1, SONG Xue-liang2, ZHANG Zi-xiong2, LI Chang-cai3, JIN De-shan4, HE Huai-zhong4, SUN You-guo4, SHUANG Ling4
1. Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China; 2. Yunnan Institute of Geological Sciences, Kunming 650051, China; 3. Yunnan Institute of Geological Engineering Investigations, Kunming 650041, China; 4. Yunnan Geological Environmental Monitoring Center, Kunming 650216, China
Abstract：Kunming basin is a fault basin formed on a background of carbonate basement. In the study area, the cations of Ca2+ and anions of HCO3-are dominated in pore water. The common types of the chemical component of pore water are HCO3-Ca, HCO3-Ca·Mg and HCO3·Cl-Ca. Affected by human activities, the chemical composition varies in different areas. The chemical types of groundwater tend complex from basin edge to center. Spatially, the groundwater shows an increasing mineralization from east to west. During the last 20 years, with the rapid urbanization of Kunming city, the quality of pore water evolves in both positive and negative directions. The groundwater mineralization near the Western Mountain and Caohai Lake has reduced yearly; while the deteriorative area is spreading to the outer part of urban districts. The variations of groundwater chemical types indicate that the changes of land use and pollution intensity have greatly impacted the groundwater environmental evolution. Factor analysis of chemical data shows that HCO3-, NO3- and COD concentrations have the highest factor loadings on factor 1, factor 2 and factor 3, which indicate natural evolution process, agricultural and domestic contaminants, and industrial pollutions respectively. The result of the factor analysis indicate that Mg2+, Na+, Cl-, SO42- and K+ derive from both natural processes and external pollution sources. The industrial pollution source represented by COD also has some influence on the concentration of Cl-, SO42- and K+ in groundwater.
叶许春, 张世涛, 莫美仙, 宋学良, 张子雄, 李长才, 金德山, 和怀中, 孙有国, 双灵. 昆明盆地孔隙水的化学特征及其演化规律[J]. 地质与资源, 2007, 16(1): 59-67.
YE Xu-chun, ZHANG Shi-tao, MO Mei-xian, SONG Xue-liang, ZHANG Zi-xiong, LI Chang-cai, JIN De-shan, HE Huai-zhong, SUN You-guo, SHUANG Ling. CHEMICAL CHARACTERISTICS AND EVOLUTION PROGRESS OF THE PORE-WATER IN KUNMING BASIN. GEOLOGY AND RESOURCES, 2007, 16(1): 59-67.
2007, Vol. 16 
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