| Based on water quality monitoring in Qionghai Lakeside road runoff from 2 typical rains in rainy and dry season each, the result showed that the major pollutants were suspended solids(SS), chemical oxygen demand(COD), total phosphorus(TP), total nitrogen(TN) and lead(Pb). Meanwhile the pollution in dry season was more serious than that in rainy season, and the pollution from the main road runoff was the most serious. Based on factor analysis, the major pollution factors were heavy metals and nutrients, whose variance contribution rate were 64.546% and 13.596%, separately. Potential ecological risk evaluation showed the average value of RI was low, and the ecological risk coefficient (Ei) of Pb reached to moderate risk level, while the other five heavy metals were in low risk. |
