云南临沧盆地地下水环境脆弱性评价

地下水脆弱性研究是合理开发利用和保护地下水资源的有效技术措施。本文根据临沧盆地水文地质条件,应用美国环保署(USEPA)的地下水脆弱性DRASTIC评价方法,考虑地下水位埋深、含水层净补给量、含水层介质、土壤包气带、地形地貌、包气带介质和水力传导系数等7个评价因子,结合GIS技术,对该区的地下水脆弱性进行了评价。结果表明,临沧盆地地下水脆弱性高区为主城区和主要农田分布区,要严格控制工业废水、生活污水的排放量和农药、化肥的施用量,防止地下水受到污染,确保地下水资源的可持续开发利用。

GROUNDWATER ENVIRONMENT VULNERABILITY ASSESSMENT IN LINCANG BASIN OF YUNNAN PROVINCE

The study on groundwater vulnerability is an effective technical measure for rational development and protection of groundwater resource.In the paper,according to the hydrogeology conditions of the Lincang Basin in Yunnan Province,USEPA's DRASTIC method was applied to evaluate the groundwater vulnerability of this area with the consideration of depth to the water table,Net recharge,aquifer material,soil type,topography,impact of vadose zone and hydrau1ic conductivity of aquifer based on the GlS technology.The results indicated that the areas with the highest vulnerability of Lincang Basin was the main urban area and agricultural areas.In order to prevent groundwater from contamination and realizing the sustainable development of groundwater resource,it was suggested that the discharge of industry wastewater and domestic sewage and the applying quantity of pesticide and chemical fertilizer should be controled.