EUTROPHICATION PREVENTION METHOD FOR WATER STORAGE AREA

摘要

PROBLEM TO BE SOLVED: To prevent the eutrophication of a water storage area by the flowing-in of water containing nutrient salt.;SOLUTION: By pumping up water of the water storage area 1 wherein a water temperature differs from inflow water 3 and mixing the inflow water 3 containing the nutrient salt 5 flowing in the water storage area 1 with the water of the water storage area 1, the height of a layer in the water storage area 1 of the inflow water 3 is adjusted, and the height of the layer in the water storage area 1 of the inflow water 3 is brought into line with the height of a discharge port 6. For example, when the water temperature of the inflow water 3 is Tin, when the inflow amount of the inflow water 3 to the water storage area 1 is Qin, when a water temperature near the discharge port 6 is To, and when a water temperature near a surface layer part of the water storage area 1 is Ts, the inflow water 3 is mixed with water near the surface layer part of the water storage area 1 such that the supply amount Qs thereof becomes (To-Tin)/(Ts-To)×Qin.;COPYRIGHT: (C)2013,JPO&INPIT