The invention relates to the technical field of
water pollution physical treatment and prevention and control of
algal bloom, and provides a manual flow making device. The manual flow making device comprises an
engineering ship, a
sewage pump, a hydrologic
winch and the like, wherein a high-power
sewage pump, a diesel oil power
machine and a generator set are arranged in a cabin of the
engineering ship, a water inlet and a water outlet of the high-power
sewage pump are respectively connected in a compression manner through a hose, a direction is adjusted through the hydrologic
winch so as to change the inlet water current and the outlet water current. According to the invention, flow field interference is taken as a core technology, through actions of the high-power sewage pump and the
engineering ship, hydrologic characteristics of a working
water area can be changed, and flow state characteristics of a
water area with water bloom can be destroyed, so that a
water body is accelerated to flow and mix, the content of dissolved
oxygen of the
water body in the working region is increased, the temperature property and the
optical property of the
water body are changed, a space
distribution pattern of
biogenesis elements is adjusted, substance circulation and energy flow are promoted, environmental conditions necessary for dominant species of
algae are destroyed, coverage cannot be kept, and competitive capacity is lost and is gradually faded.