Prediction Model of Groundwater Pollution by Nitrogen
氮对地下水的污染预测模型

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.