滇东断陷盆地地下水污染的水文地质模式

Hydrogeological Model of Groundwater Pollution in Eastern Yunnan Plateau Downfaulted Basin

高原断陷盆地区耕地分布集中、水资源汇集、交通便利,是主要的人口聚集区和经济发展区.由于经济的发展和城市化建设的加快,高原断陷盆地区地下水污染逐年加重.本文以断陷盆地最为集中的滇东断陷盆地区为研究对象,通过区内典型地下水污染事件,并分析了每个污染事件的污染物类型、排放方式、排放及污染途径、污染速度及污染程度,归纳了高原断陷盆地地下水的污染模式,主要有四种:间歇性渗入污染、持续性渗入污染、突发性灌入污染、渐进性越流污染.

Plateau downfauhed basin area with cultivated land distribution, collection of water resources, con- venient transportation, is a major population and economic development area. Ground water pollution increases year by year because of the development of the economy and quickening urbanization. This paper takes eastern Yunnan downfaulted basin area, which is the most centralized down -faulted basin area, as the research object, to analyze the types of pollutant, emissions of pollutants, channels of emission and pollution, the pollution rate and degree of contamination in each pollution incident. The groundwater pollution models of plateau basin and are summarized as intermittent infiltration pollution, continuous infiltration pollution, gusty injection pollution and the gradual leaky pollution.