摘要
本文利用分段模拟试验法,研究氮在土壤中的行为及其污染地下水的途径.在此基础上建立了地下水污染的氮预测模型,并用现场试验监测数据对该模型进行验证和修正.模型预测表明:产生地下水氮污染的主要因子是硝酸根,而反硝化过程是土壤去除硝酸根的主要途径.因此,保持一定厚度的厌氧土层以利于反硝化作用是防止产生土壤和地下水氮污染的最有效方法.
In the paper, the transport and transformation of ammonia-N and nitrate-N and ways of ground water contamination by the nitrogens were studied through a method of simulation tests by dividing the soil into profiles. Based on the reseach results, prediction models of subsoil and ground water pollution by nitrogen were deduced and then verified and improved through field observations.The modeling output indicates that the most effective means to protect soil and ground water from nitrogen pollution is to remove nitrate. It is necessary to keep an anaerobic soil zone with a certain thickness, for nitrate can be eliminated easily by denitrificatinn reactions in the zone.
出处
《环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1991年第6期8-11,共4页
Environmental Science
关键词
水污染
地下水
氮
预测模型
nitrogen
groundwater pollution
modelling
denitrification.
