| 摘要 |
PROBLEM TO BE SOLVED: To solve an unsolved problem related to recreational use of a natural/artificial large water area having an inferior water quality, such as a lake, a lagoon, a sea or a dam.SOLUTION: There is provided a method for controlling a microbiological property of a zone, by treating a water area part in a large water area by using a chemical, by a water temperature, a salinity concentration, dilution power and diffusion of a chemical material in the large water area.SELECTED DRAWING: Figure 1 |
