Abstract: High dam spill, sudden warming and photosynthesis of nature water may result in supersaturation of water body with dissolved gases, such as dissolved oxygen and total dissolved gas, and this phenomenon might cause gas bubble disease and even mortality in fishes. To explore effective techniques for recovery of supersaturated water of this type, a series of aeration experiments were conducted in this work for the conditions of different aeration rates, water depths and aeration apertures. The results showed that aeration of water body can greatly accelerate the release of dissolved gas from supersaturated water body. When an aeration rate of 3.0 m3 h-1 was used, the release coefficient was increased to 0.48 min-1, or about 3000 times as large as that without aeration condition (0.00016 min-1). The release coefficient increased with the increasing aeration rate and decreased with the increasing aperture and water depth. A quantitative relationship of release coefficient versus water depth and aeration rate at given aeration apertures was developed. The present study lays a basis for further study and provides new ideas for design of practical measures.