Origin, characteristics and mass balance of recalcitrant dissolved organic matter in lake environments

通过模型计算，定量评价了2001-2007年柏浦湖顽固性溶解有机质的动态变化。入河流量、泥沙释放、污水处理厂出水、直接降雨量、水体内部产量分别占68%、12%、2.9%、0.7%和18%。2007年发生藻类水华时，底泥释放和内部生产的贡献大大增加。

Dynamics of recalcitrant dissolved organic matter in Lake Kasumigaura was quantitatively evaluated from 2001 to 2007 through model calculation. River inflow, sediment release, sewage treatment plant effluent, direct rainfall, internal production in water column accounted for 68%, 12%, 2.9%, 0.7% and 18%, respectively. The contribution of sediment release and internal production was substantially increased in 2007 when algal bloom occurred.