Abstract
In late years, a micro-bubble aeration system attracts attention as a means of improving bottom hypoxic waters. In the present study, we examined the performance of the system applied to a fishing port anchorage where hypoxic slack waters often appear during summer. We performed field experiments and then developed a numerical model capable of reproducing the measured data. Forcing the model, we reproduced the observed hydrodynamic and water quality fields during the operation of the micro-bubble aeration system. From the numerical results, we found that the system can improve the bottom hypoxic waters up to the horizontal scale of 25m. This indicates that the total improvement of the present targeted area would be achieved if 4 to 7 sets of the system are properly allocated covering whole of the area.
