香港石岗——小溪磷、氮浓度的变化及影响因素

研究香港石岗一条小溪在1991年夏雨季溪流中氮和磷的浓度及其在暴雨过程中的变化。结果表明:在基本径流中的氮、磷浓度很低,而在暴雨期间,溪流的氮、磷浓度随水文过程线的上升而增加,但随着暴雨时间的延长,氮、磷浓度随水文过程线增加的趋势会逐渐减弱。与小溪下游汇入的河流比较来看,人为活动对河流的氮、磷浓度影响较大,如不加以控制,将会引起水质恶化。 

The Variation and Effect Aspects of Concentrations of Phosphorous and Nitrogen in a Small Stream near Shekong in the New Territories,Hong Kong

The concentrations of P and N and their variation during summer storms have been studied in a small stream near Shekong,Hong Kong.The results showed that The concentrations of P and N were very low in baseflow;however,during summer storms the concentrations of P and N increased with hydrological processes in the beginning,and then this trend would subside with the prolongation of storms;comparing the concentrations of P and N in the upland stream with those downstream in the low lands,it was found that the concentrations of P and N in this stream were strongly affected by human activities and that eutrophication would occur if the discharge of sewage was not controlled.