OXYGEN CONSUMPTION PROCESSES DUE TO RESUSPENSION OF SEDIMENT IN ARIAKE SEA
The oxygen consumption processes due to suspended sediment (SS), which play important role in the formation of hypoxic water mass, have been investigated experimentally by using the bed materials sampled off Takesaki in the Ariake Sea, Japan. The oxygen consumption due to SS is usually attributed to both biological respiration and chemical oxidation. In the measurements of the total oxygen consumption (TOC), the sampled bed materials were added in the aerated water column and were stirred to curl them up uniformly. On the other hand, the solution of HgCl2 was added in the measurements of chemical oxygen consumption (COC) to suppress the biological respiration. The biological oxygen consumption (BOC) was calculated from the difference between TOC and COC. With time, COC increases exponentially and approaches gradually a constant value.However, BOC continues to increase monotonically with time. In the initial stage, COC is more predominant than BOC. The dimensionless expressions for TOC, COC and BOC are derived on the mathematical considerations and express well the three types of oxygen consumptions due to SS.
suspended sediment ozygen consumption hypozia Ariake Sea
H.Li N.Mutsunaga T.Tokunaga Y.Hisada
Dept.Of Earth System Science and Technology, Kyushu University,Kasuga, 816-8580 Japan Dept.Of Earth System Science and Technology, Kyushu University, Kasuga, 816-8580 Japan Lecturer, Institute of Lowland Technology, Saga University, Saga 840-8502 Japan Research Institute for Applied Mechanics, Kyushu University, Kasuga, 816-8580 Japan
国际会议
第16届亚太地区国际水利学大会暨第3届水工水力学国际研讨会(16th IAHR-APD Congress and 3rd Symoposium of IAHR-ISHS)
南京
英文
1353-1358
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）