太子河流域本溪段非点源氨氮污染研究

NH3-N of non-point source pollution in Benxi section of the Taizi River

ArcSWAT模型模拟了太子河流域本溪段非点源氨氮污染负荷,分析了研究区域2018年非点源氨氮负荷的分布特征,阐明了控制流域非点源氨氮污染的最佳管理措施。通过对ArcSWAT模型模拟的结果进行率定与验证,结果表明,模型适用于研究区域,具有良好的拟合度。对2018年的非点源氨氮单位负荷分布特征分析显示,研究区域的总负荷为2298283 kg,单位负荷为25.35 kg/hm^(2);区域内3、6、9等13个子流域为耕地集中区,其为氨氮负荷严重区域。利用最佳管理措施方法削减氨氮负荷的研究表明,退耕还林和增设耕地植被缓冲带措施的结合为最佳管理管理措施;措施实施后,流域非点源污染氨氮负荷将削减65.64%。

The ArcSWAT model was used to simulate the non-point source NH_(3)-N pollution load in the Benxi section of the Taizi River Basin,and the distribution characteristics of the non-point source NH_(3)-N load in the study area in 2018 were analyzed.Through the calibration and verification of the simulation results of the ArcSWAT model,the results show that the model is suitable for the study area and has a good degree of fit.The analysis of the distribution characteristics of non-point source NH_(3)-N unit load in 2018 shows that the total load in the study area is 2298283 kg,and the unit load is 25.35 kg/hm^(2);13 sub-basins such as 3,6,and 9 in the area are cultivated land concentration areas,which are NH_(3)-N heavily loaded areas.The research on reducing NH_(3)-N load by using the best management measures shows that the combination of returning farmland to forest and adding a vegetation buffer zone for cultivated land is the best management and management measure;after the implementation of the measures,the NH_(3)-N load of non-point source pollution in the basin will be reduced by 65.64%.