GAO Yong-xia, SUN Xiao-jing, ZHANG Zhan-ping, ZHU Guang-wei, PANG Yong. Simulated study on concentration change of different form phosphorus in shallow lakes caused by wind-wave disturbance[J]. Advances in Water Science, 2007, 18(5): 668-673.
Citation: GAO Yong-xia, SUN Xiao-jing, ZHANG Zhan-ping, ZHU Guang-wei, PANG Yong. Simulated study on concentration change of different form phosphorus in shallow lakes caused by wind-wave disturbance[J]. Advances in Water Science, 2007, 18(5): 668-673.

Simulated study on concentration change of different form phosphorus in shallow lakes caused by wind-wave disturbance

  • In order to know about concentration change of different fomn phosphorus and find out the contributed faotoxs during a whole wind wave process (including the periods of disturbance and calm wind), a simulated disturbance experiment was done.The results show that at the beginning of disturbance, suspended solid(SS)、total phosphorus(TP)、particle phosphorus (PP) and dissolved total phosphorus(DTP) in water increase remarkably; SS, TP and PP will reach their maximum value when the disturbance lasts half a day; SS, TP and PP need at least 10 days to drop to undisturbed level.During the disturbance period, DTP kept high value, but it drops immediately when the disturbance stops, while SRP had no big change during the whole process.Phosphorus combined with Fe (Fe-P) and Mn (Mn-P) in anaerobic sediment will be releases easily at the beginning of disturbance, then they sink to the bottom of water During the period of disturbance and a day after calm wind, the middle size particle of SS decreases constantly, which means SS is able to adsorb more and more phosphorus.Long time after calm wind, particle size become bigger and bigger for flocculation and SS brought by disturbance settled almost completely.The study states that the crease of oxygen in water, the percent growth of organic matter in SS and the decrease of particle size with the disturbance lasting can enhance SS's ability to absorb phosphorus, though the wind wave disturbance can bring much PP and DTP into water, which can be used directly or indirectly by algae.Activated phosphorus concentration in water has no big change as a result of the two processes interaction.
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