Abstract:

Based on the influence of meteorological and hydrographical conditions on the distribution of Microcystis bloom,bloombarrier and bloomtrap were constructed in Wannianbu coastal zone area in the Chaohu Lake.The bloomcontrolling effect of this integrated technology was evaluated by the comparison of water quality between inside and outside of the barrier or trap.Investigation results suggested that it is scientific and reasonable to build bloombarrier and bloomtrap in Wannianbu coastal zone area,the because the monitoring showed that the biomass of cyanobacterial bloom was aggregated by wind and water filed in the coastal zone area.Bloombarrier had good effect for blocking the algae,and the blocking rates for bloom biomass and chla were higher than 50% and 50%,respectively.Also,the phytoplankton biodiversity inside the enclosure was significantly higher than that outside of the enclosure.Bloomtrap could efficiently collect and trap the cyanobacterial bloom,and the dry biomass could reach to 2 kg/(m2·day). All these results suggest that this integrated bloomremoval technology has high efficiency in bloom controlling,and it has a good prospect of application