陕北风沙滩地区浅层地下水氮污染及其预测  

Nitrogen pollution status and forecast in shallow groundwater in blown-sand region of northern Shaanxi province

作　　者：李孝廉[1] 李琦[2] 

机构地区：[1]西北大学城市与环境学院,陕西西安710069 [2]长安大学环境科学与工程学院,陕西西安710054

出　　处：《长安大学学报（自然科学版）》2010年第3期93-99,共7页Journal of Chang’an University(Natural Science Edition)

基　　金：教育部科学技术研究重大项目(308021);环境保护部与国土资源部联合工作项目

摘　　要：以陕北风沙滩地区地下水"氮污染"为研究对象,采用野外采样、室内测试分析、污染评价以及数值仿真模拟等方法对浅层地下水"氮污染"进行了评价与仿真模拟。结果表明:研究区地下水已不同程度受到氨氮、亚硝态氮、硝态氮等的污染,通过现状分析和数值仿真模拟,该区地下水水质总体较好,污染区主要分布在农田灌溉区和人口密集区的地下水位埋深小于5 m地段,这些地区是地下水易受污染的高风险区,应进一步加强对区内不合理的人类活动的控制,健全水资源管理等,达到有效保护与持续开发区内地下水资源的目标;建立的包气带水分和"三氮"迁移与转化耦合模型为区内今后地下水污染与保护提供了预警平台。This paper is to assess and simulate the nitrogen pollution in shallow groundwater in the blown-sand region of the northern Shaanxi province by the methods of field sampling,indoor tests analysis,pollution assessment and numerical simulation.The results showed that the groundwater in the study area has been suffering from ammonia,nitrite,nitrate pollution in different degrees.Through the status analysis and numerical simulation,the most groundwater quality in the study areas is in a good condition,contaminated areas are mainly distributed in irrigation areas and densely populated areas where the water table is less than 5m.These areas are susceptible to groundwater pollution in high-risk areas,so enhancing the control of illegitimate human activities and improving the water resource management should be done to effectively protect the groundwater resource against pollution and bring about the sustainable development of economy.This paper established the coupled model of unsaturated zone water and mitrogen migration and transformation to provide early warning platform for groundwater pollution and protection of the region in the future.1 tab,8 figs,17 refs.

关 键 词：浅层地下水 氮污染 数值模拟 预测 风沙滩地区 陕北 

分 类 号：P641.3[天文地球—地质矿产勘探]