抄録
Southern part of Keihin Canal in Tokyo bay is highly urbanized. The water is warmer than the other part of Tokyo bay because of thermal pollution from many industries. The lack of DO is also severe. Some countermeasures improving the water quality, e. g. small artificial tidal flat, have been considered. However, because of the lack of information of water quality, the efficiency of these countermeasures is not clear. In order to clarify the environment in Keihin Canal, water quality is measured every 2 weeks at fixed points in and outside of the Canal.
Following results are obtained. 1) In autumn, anoxic water of the canal possibly flows out into Tokyo Bay estimated by the T-S data. 2) The surface water temperature is 2°C higher than the outside of the canal.
