The present invention provides a method for removing algae scum on a lake in which a flow of water is formed in one direction, comprising the steps of: collecting algae scum through an algae removal vessel; Receiving the collected algae scum in a plurality of collection bins; Dropping a plurality of said bins onto the lake; And the step of collectively collecting the dropped container from the location of the container located at the lowermost stream of the dropped container-meaning the lowermost stream according to the flow direction of water -. It is about.
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