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该文基于汤逊湖流域的空间和属性数据,应用SWAT模型对其流域农业面源氮、磷入湖通量进行计算分析。结果表明2014年汤逊湖流域农业面源氮、磷年入湖通量分别为490 t/a和31.15 t/a,其氮、磷入湖通量最大的月份均出现在降雨量较大的5月,分别为59 t/月和5.58 t/月;东湖高新区和江夏区的农业面源污染对汤逊湖的贡献最大,应作为重点控制区域。
Based on the spatial and attribute data of the Thomson Lake basin, SWAT model was used to calculate and analyze the agricultural non-point source nitrogen and phosphorus flux into the lake. The results showed that the annual fluxes of nitrogen and phosphorus in agricultural area were 490 t / a and 31.15 t / a, respectively, in the Thomson Lake Basin in 2014, and those with the largest flux of nitrogen and phosphorus into the lake appeared in the areas with large rainfall May, respectively, 59 t / month and 5.58 t / month; East Lake High-tech Zone and Jiangxia District, agricultural non-point source pollution contributes most to Thomson Lake should be taken as a key control area.