Abstract
The effect of a water circulating device to cancel bottom water stagnation and starvation of dissolved oxygen in the bottom water was examined in enclosed area in KANSAI international airport.The difference of water temperature between surface and bottom whose initial value was over 10°C was diminished to less than 1°C after a week of device operation causing an increase in dissolved oxygen saturate ratio over 30%.These effects were reproduced by numerical model to suggest its possibility to be an effective procedure for planning environmental protection for water quality of inner water area of KANSAI international airport.
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