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唐山平原区地下水硝酸盐污染变化趋势的研究 被引量:13

Study on the Trend of Nitrate Pollution of Groundwater in the Plain Area of Tangshan
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摘要 唐山平原区的地下水由于过量开采出现了漏斗区 ;同时由于不合理的灌溉与施肥 ,使得地下水中硝酸盐氮含量普遍呈上升趋势。应用LEACHM数学模型 ,对唐山农业地区灌溉施肥条件下 ,氮素在土壤中的迁移转化进行了模拟计算 ,并估算了根区以下硝态氮的渗漏损失量。利用所建的地下水水量水质模型对研究区内水量水质变化趋势进行了模拟计算和分析。研究结果表明 ,唐山农业地区灌溉施肥过程中氮素的深层渗漏损失是造成浅层地下水中硝态氮积累并逐步扩展的一个重要原因 ,为此有必要加强监测工作并采取相应的措施保护地下水免受污染。 Because of excessive exploitation, the groundwater in the plain area of Tangshan sinks quickly; moreover, the nitrate N concentration in groundwater takes increasing trend. LEACHM model is used to analyze transport and transform of nitrogen in the soil under fertilizing irrigation condition, especially to determine the leaching losses of nitrogen beneath the root zone. The two dimension groundwater quantity and quality model in the horizontal plane is also built for simulating and predicting nitrate N pollution in the groundwater. The studied results indicate that the nitrogen losses under the root zone in the process of fertilizing irrigation is the important cause of nitrate N accumulation and development in the shallow groundwater in the agricultural area of Tangshan city. Reasonable agricultural managent methods should be taken in order to reduce the nitrogen leaching loss as much as possible for protecting groundwater from pollution.
出处 《水力发电学报》 EI CSCD 北大核心 2002年第1期68-75,共8页 Journal of Hydroelectric Engineering
基金 国家自然科学基金资助项目 (批准号 :599790 14 )
关键词 地下水 水量 水质模型 灌溉 施肥 硝酸盐 污染 Quantity and quality model of groundwater Nitrate N pollution Fertilizing irrigation
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