重庆南川区不同土地利用类型对表层岩溶泉水水质的影响

以重庆南川木渡河流域为研究区域,对耕地、马尾松林地和石漠化地这3种土地利用类型影响下的表层岩溶泉水的水化学性质进行研究。结果表明,石漠化土地影响下的表层岩溶泉水的电导率及Na＋、Cl-、SO42-、NO3-浓度都高于耕地和马尾松林地影响下的表层岩溶泉水,石漠化地影响下的表层岩溶泉水的水质较差,其中NO3-浓度已明显超标。研究区域表层岩溶泉水的水化学性质与人类活动对土地利用的程度差异表现出明显的对应关系。因此,在岩溶区进行土地利用时应采取更加合理的措施来治理和保护岩溶地区有限的地下水资源,满足人类生产和生活的需要。

Impact of Different Land Use Patterns on the Quality of Epikarst Spring in Chongqing Nanchuan

The chemical properties of epikarst springs in mudu watershed,nanchuan,Chongqing under the influence of three land use patterns,namely,farmland,coniferous forest land and rock desert land,were studied.Results show that,the electric conductivity and the concentration of Na+,Cl-,SO42-and NO3-of the epikarst spring in the rock desert land were much higher than that in other two land use patterns.The water quality in the rock desert land was bad and its concentration of NO3-has exceeded the allowed standard.The quality of epikarst springs were correspondent with the variation of land use.Thus,more reasonable measures should be taken to protect the limited ground water resources in karst area so as to satisfy the people's needs.