The invention discloses a method for treating eutrophic lake
cyanobacterial bloom. An
enclosure parallel to the local prevailing
wind direction is built to block
water flow exchange, and large lake
cyanobacteria are prevented from entering a control
water area. By means of the characteristic that the
cyanobacteria floating on the
surface layer move with prevailing wind as main drive force, blocking is carried out, the
cyanobacteria are guided to the down-wind lakeshore in the direction of the
enclosure, and a cyanobacterium enrichment area is formed. A cyanobacterium removal facility is arranged in the cyanobacterium enrichment area, and the cyanobacteria are removed in a large area with high strength. A drainage facilitate with the
water flow direction consistent with the prevailing
wind direction is arranged,
reclaimed water or
clean water is drained to enter the control
water area to replace
contaminated water, and meanwhile water power is enhanced. A
water layer mixing facility is arranged in the
water area with low water power, the upper
water layer and the lower
water layer are disturbed,
water flow circulation in the transverse direction and the longitudinal direction is generated to the water, the still
water environment needed for accumulation of the cyanobacteria is damaged, and the aims of controlling and restraining the cyanobacteria are achieved. According to the method, the
cyanobacterial bloom breakout intensity can be effectively controlled, the
ecological environment of the nearshore water area is restored, and the
water environment quality and the area landscape effect are remarkably improved.