涟水流域非点源污染特征

Non-point source pollution of the Lianshui upper basin

依托GIS软件平台,将SWAT模型应用于湘江支流涟水流域,对涟水流域径流、泥沙及非点源氨氮、总磷污染负荷进行模拟计算.研究结果表明,基于SWAT模型的涟水流域非点源污染模拟是可行的.通过统计分析揭示了涟水流域非点源污染的时空分布规律;通过对比不同施肥水平和不同时期土地利用情景下非点源污染负荷,揭示了施肥水平及土地利用对非点源污染负荷影响,为涟水流域非点源污染治理提供了一定的借鉴和指导意义.

Based on GIS software platform,SWAT model was applied to Lianshui basin to simulate the runoff,sediment and load of NH3-N,TP.The results showed that the model is feasible to the simulation of the non-point source pollution of Lianshui basin.Through the statistics and analysis,this paper revealed the temporal and spatial distribution characteristics of non-point source pollution of the basin.Through comparing the non-point source pollution load in different fertilization level and different land use of different periods,the paper revealed the effects of fertilization level and land use on non-point pollution load in order to provide some reference and guidance significance.