Field Measurement about Effects of Aeration/Circulation in a Dam Reservoir

Abstract

Aeration/Circulation is a method to reduce algae abundance by generating vertical circulation. It is said that this countermeasure is performed by limiting light, supplying dissolved oxygen to hypolimnion, lowering of pH of epilimnion, and so on.
In this study, results of field measurement are shown and following consequences are obtained.
1. When blue-green algae is dominant, pH of the epilimnion is high.
2. After treatment, pH of the epilimnion has been lowered and dominance of blue-green algae in summer has disappeared in this reservoir.