Naturally friendly eco-friendly method that restores the natural ecosystem by using the esophagus which is always formed while purifying polluted river water naturally by discharging clean river water with heavy gravity first

摘要

The present invention relates to an environmentally friendly method for restoring a natural ecosystem using fishway and for naturally purifying polluted river water by primarily discharging clean river water having a great specific gravity to purify polluted river water flowing to a river by forming a fishway for ecosystem restoration and discharging polluted river water flowing to the river after purifying it; and to maintain a predetermined amount of river water by preventing river water from being completely discharged through the bottom water discharge passage of a floodgate during a dry season.