[Objective] The study aimed to estimate the release flux of sediment phosphorus in Shiwuli River estuary of Chao Lake in summer. [Method] Under static and dynamic conditions, we analyzed the release characteristics of...[Objective] The study aimed to estimate the release flux of sediment phosphorus in Shiwuli River estuary of Chao Lake in summer. [Method] Under static and dynamic conditions, we analyzed the release characteristics of sediment phosphorus in Shiwuli River estuary of Chao Lake in summer, and estimated the release flux of sediment phosphorus in the studied area in summer. [Result] Disturbance had great effects on the release of sediment phosphorus in Shiwuli River estuary of Chao Lake in summer. When phosphorus concentration in overlying water was 0 mg/L, the amount of released phosphorus under dynamic conditions was 2.3 times as much as that under static conditions; as phosphorus concentration in overlying water was 0.05 mg/L, the amount of released phosphorus under dynamic conditions was 1.3 times as much as that under static condi- tions. In a word, the amount of released phosphorus under dynamic conditions was higher than that under static conditions. In summer, the release flux of sediment phosphorus in Shiwuli River estuary of Chao Lake was very high, namely 0.2 t/km2. Therefore, besides controlling exogenous phosphorus pollution, we should pay more attention to the release of sediment phosphorus. [ Conclusion] The research could provide theoretical ref- erences for dredging sediment and controlling lake eutrophication in future.展开更多
基金Supported by National Science and Technology Key Project of Water Pollution Control and Management(2008ZX07103-007)
文摘[Objective] The study aimed to estimate the release flux of sediment phosphorus in Shiwuli River estuary of Chao Lake in summer. [Method] Under static and dynamic conditions, we analyzed the release characteristics of sediment phosphorus in Shiwuli River estuary of Chao Lake in summer, and estimated the release flux of sediment phosphorus in the studied area in summer. [Result] Disturbance had great effects on the release of sediment phosphorus in Shiwuli River estuary of Chao Lake in summer. When phosphorus concentration in overlying water was 0 mg/L, the amount of released phosphorus under dynamic conditions was 2.3 times as much as that under static conditions; as phosphorus concentration in overlying water was 0.05 mg/L, the amount of released phosphorus under dynamic conditions was 1.3 times as much as that under static condi- tions. In a word, the amount of released phosphorus under dynamic conditions was higher than that under static conditions. In summer, the release flux of sediment phosphorus in Shiwuli River estuary of Chao Lake was very high, namely 0.2 t/km2. Therefore, besides controlling exogenous phosphorus pollution, we should pay more attention to the release of sediment phosphorus. [ Conclusion] The research could provide theoretical ref- erences for dredging sediment and controlling lake eutrophication in future.
