区域尺度农田氮磷非点源污染与模型应用分析

Analysis of Agricultural Non-point Pollution and Its Models Application

分析了农田非点源污染对生态环境的危害性,并阐述农田氮、磷非点源污染的机理及其在不同自然条件下的影响因素和监测方法。同时,对农田非点源污染的定量化、应用效应等进行了对比分析。此外,结合农田非点源污染与相关模型作了应用实例分析。

Discussing the harmfulness of agricultural non-point pollution to the ecological environment. We introduce the mechanism and the inspecting method in agricultural non-point pollution. As one of the most important research fields of non-point pollution, the agricultural non-point pollution research has been accentuated and developed rapidly. This article introduces and analyzes several representative agricultural non-point pollution models and predicts the development trend of this research. So it is in possession of certain significance for the management and study. There is a very close relationship between non-point source pollution and land use in watershed. On the basis of this fact, the export coefficient modeling approach has got substantially developed. An improved export coefficient method for estimating polluting load of non-point source pollution is proposed.