厦门城市降雨径流氮、磷污染特征

Nitrogen and phosphorus pollution from urban stormwater runoff in Xiamen City

以厦门岛为研究对象,通过收集代表性样点的降雨径流水样,研究了厦门城市降雨径流中氮、磷浓度及输出特征。结果表明,来源不同的城市降雨径流中氮、磷浓度差异较大,溶解态总氮、硝态氮、氨态氮与总磷的含量分别为1.96~6.77、0.62~4.89、0.35~1.18和0.04~0.66 mg.L-1。降雨过程中氮、磷浓度总体上呈下降趋势,氮浓度波动较大,磷相对稳定。城市降雨径流氮、磷污染受降雨强度、车流量等多种因素影响。城市道路、商住区及工业区径流中氮、磷浓度较高,是城市非点源污染的主要来源,因此对这些区域应重点控制管理。

In this study,the stormwater samples of 4 storm events occurred in April and May 2005 were collected from different representative sites including road,roof,and residential,commercial and industrial districts in Xiamen Island.All the samples were delivered to laboratory within 24 h,and their NO_3~——N,NH_4^+-N, dissolved total nitrogen(TN),and total phosphorus(TP) contents were analyzed.The water quality data showed there was a significant difference in the nitrogen and phosphorous concentrations of the stor...