| Total nitrogen, total phosphorus and chlorophyll a in the water from 18 sampling sites in the main tributaries of Jialing River（Nanchong Section）were detected, their spatial distribution characteristics and the potential influencing factors were discussed. The eutrophication level of Jialing River (Nanchong Section) and its tributaries were evaluated according to revised Carlson Nutritional Status Index (TSI). The results showed that the concentration of nitrogen, phosphorus, and chlorophyll a in downtown Nanchong Section of Jialing River were high. East River, Xixi River, Luoxi River, West River and other tributaries were greatly affected by human activities, where the content of nitrogen, phosphorus, and chlorophyll a were high. The value of TSI varied from 49.95 to 63.69 in Jialing River (Nanchong Section) and its tributaries. The eutrophication was of the most serious in West River (TSI=63.69). Nitrogen and dissolved oxygen were the main factors affecting the eutrophication of Jialing River (Nanchong Section). |
