寇河流域非点源总磷多情景减排措施效果分析

近年来寇河水质不能稳定达标,总磷为该水体的主要污染物之一,评估各面源污染控制措施的减排效果,对寇河流域水环境的后续治理具有重要意义。构建SWAT模型,使用实测径流水质数据对模型参数进行率定和验证,用校准后的模型模拟多种调控措施的减排效果。结果显示,测土配方施肥的总磷削减率为28.54%,设置缓冲带的总磷削减率为43.25%,残茬覆盖耕作的总磷削减率为41.76%,各措施均能有效减少面源总磷入河量。

Water quality in the Kouhe River has not been able to consistently meet standards in recent years,total phosphorus is as one of the main pollutants in this water body,so it is very important to evaluate the effect of non-point source pollution control methods.The SWAT model was established,the parameters of the model were calibrated and verified by using the measured runoff water quality data,and the calibrated model is used to simulate the emission reduction effects of multiple regulatory measures.The results showed that the total phosphorus reduction rate of formula fertilization was 28.54%,the total phosphorus reduction rate of setting buffer zone was 43.25%,and the total phosphorus reduction rate of stubble mulching tillage was 41.76%,all measures can effectively reduce the amount of non-point source total phosphorus into the river.