An experimental study has been done to examine the characteristics of oxygen uptake by resuspended silty sediments. Experiments were conducted on the sea bottom materials taken from the Tokyo Bay, the Osaka Bay, and the Hiroshima Bay. Those bays are famous for their entrophic condition. The effects of the resuspend sediments on the dissolved oxygen was investigated at various conditions of water temperature, concentration of the suspended sediments and the organic content in the sediments. After the basic tests of its property, a manometric type respirometer dvice was used for this purpose.
　The results demonstrate that the oxygen demand of the resuspended sediments is different from that of the quiescent sediments. The first stage uptake process by the resuspension sediments is formulated as a first order kinetics approximation. Through experimental studies, it is clarified that the oxygen uptake rate parameter changes remarkably with the changes of temperature, while the uptake potential parameter changes with the organic concentration of the sediments. The oxygen demand during the resuspension is proportional to the mass of the suspended sediments.
Disturbances to the quiescent organic bottom sediments can make the oxygen uptake increase in rate.