WATER ENVIRONMENT IMPROVEMENT METHOD BY WATER DEPTH ADJUSTMENT METHOD IN CLOSED WATER AREA SUCH AS LAKE

摘要

PROBLEM TO BE SOLVED: To provide a water environment improvement method which saves energy and is provided at low cost, for solving following problems in a closed water area such as a lake: bad odor occurrence due to corruption of a large amount of water plants, landscape deterioration due to a large amount of overgrowth of water plants such as Trapa japonica, deterioration of an inhabitation environment of aquatic lives due to poor oxygen in water, and consumption of dissolved oxygen, wherein the method does not adversely affect the environment.;SOLUTION: The water environment improvement method is configured so that, in a closed water area such as a lake, according to a growth period and growth environment of a specific aquatic life, water depth is adjusted by increasing or reducing a water discharge amount of a water discharge part such as a water gate, an intake amount of sunlight to a bottom part is increased, a tideland is formed on the surrounding of the water area, and a large amount overgrowth of a specific water plant is suppressed.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2016,JPO&INPIT