The seasonal and spatial variation of external nutrient loading from rivers and their impact on lake water quality were analyzed in Lake Taihu,China,using the monthly monitoring data from 16 major inflow/outflow rivers and 32 observation sites in the lake. The results showed:(1) The average monthly values of total nitrogen(TN),dissolved total nitrogen(DTN),total phosphorus(TP),and dissolved total phosphorus(DTP) in rivers were all higher than the corresponding areas in the lake. Significant positive correla...