城市化对岩溶水系统化学组分演化的影响——以重庆市南山老龙洞地下河为例

为研究城市化作用下的岩溶区地下水水质演变状况,基于2008-2012年对老龙洞地下河的pH值、电导率、水温、K^+、Na^+、Ca^2+、Mg^2+、HCO3^-、Cl~-、NO3^-、SO4^2-、PO4^3-等水物理化学指标的连续监测,分析了老龙洞地下河流域水质的演变趋势,并对2011年8月的单场降雨条件下地下河水质的动态变化进行主成分分析(PCA)。结果表明,在城市化过程中,地下河水Na^+、Cl~-、PO4^3-、Ca^2+、Mg^2+、HCO3^-等离子浓度受人类活动影响而明显上升,NO3^-、SO4~(2-)浓度则因为城市化效应增强和农业活动强度的降低而下降。老龙洞地下河水补给来源...

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Published in中国岩溶 Vol. 36; no. 4; pp. 541 - 549
Main Author 张海月 杨平恒 王建力 蓝家程 詹兆君 任娟 张宇
Format Journal Article
LanguageChinese
Published 西南大学地理科学岩溶环境重点实验室,重庆,400715%国土资源部岩溶生态环境-重庆南川野外基地,重庆,408435 2017
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Summary:为研究城市化作用下的岩溶区地下水水质演变状况,基于2008-2012年对老龙洞地下河的pH值、电导率、水温、K^+、Na^+、Ca^2+、Mg^2+、HCO3^-、Cl~-、NO3^-、SO4^2-、PO4^3-等水物理化学指标的连续监测,分析了老龙洞地下河流域水质的演变趋势,并对2011年8月的单场降雨条件下地下河水质的动态变化进行主成分分析(PCA)。结果表明,在城市化过程中,地下河水Na^+、Cl~-、PO4^3-、Ca^2+、Mg^2+、HCO3^-等离子浓度受人类活动影响而明显上升,NO3^-、SO4~(2-)浓度则因为城市化效应增强和农业活动强度的降低而下降。老龙洞地下河水补给来源复杂,其中碳酸盐岩地质背景、人类活动及水土流失对地下河水质变化起着决定作用。城市化水平的提高、区域环境的变化,使得老龙洞地下河的水质也处于不断变化中,从硝酸盐、硫酸盐的年际变化看,地下河水质已有较大改善。
Bibliography:karst groundwater, urbanization, pollution, water quality evolution, Laolongdong watershed
45-1157/P
The underground river is in Nanshan district of Chongqing City where the karst groundwater is well-developed.There are karst depressions,sinkholes,underground rivers and exposed springs,which has the features of sensitivity and vulnerability of typical karst groundwater systems.Due to urbanization and human activities,groundwater in this area has been seriously polluted in recent years.In this paper,an underground river conduit in the karst area is taken as an example.Through analyzing the evolution of the underground,water quality deterioration and pollution sources of the groundwater,the main controlling factors of groundwater pollution in the study area are discussed,in order to protect the groundwater and provide a scientific basis for groundwater governance in this area.From 2008 to 2012,the outlet of Laolongdong underground river was chosen as a water quality minoring locality where pH value,conductivity,w
ISSN:1001-4810
DOI:10.11932/karst20170416