Abstract
Hydrodynamic structure was measured in a reservoir equipped with bubble-diffuser type destratification system. Water quality of the reservoir is much eutrophic, so that the system of destratification is operated during summer to prevent algal bloom. However, appropriate operation of the system requires substantial understanding on hydraulic structure in the reservoir. In this study, two kinds of flow measurements were conducted: vertical profile of velocity at a fixed point for two weeks during stratification season, and spatial flow pattern in the reservoir. The former elucidated three-layered structure of current which is likely to be made by not only the destratification system but also internal seiche and the seasonal stratification. The latter illustrated detailed spatial flow pattern under operation of bubble diffusers.
