Studies of the physico-chemical conditions of the sediment-water interface in Lokka and Porttipahta reservoirs
The physico-chemical conditions of the sediment-water interface in the Lokka and Porttipahta reservoirs in Northern Finland were investigated. Oxygen concentration was measured from sedimented matter and the bottom sediment with a minielectrode measurement technique. The consumption of O 2 was calcu...
| Main Authors: | , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
1998
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| Subjects: | |
| Online Access: | https://cris.vtt.fi/en/publications/4638965c-1fe8-410b-a25e-df3fc52a842a |
| Summary: | The physico-chemical conditions of the sediment-water interface in the Lokka and Porttipahta reservoirs in Northern Finland were investigated. Oxygen concentration was measured from sedimented matter and the bottom sediment with a minielectrode measurement technique. The consumption of O 2 was calculated by Fick's first law of diffusion across the sediment-water interface. Methane samples were sub-sampled from sediment cores and analysed with a gas Chromatograph equipped with FI-detector. The oxygen and methane concentrations correlated to the redox potentials. Methane concentration was high in organic rich sediments with low redox potential values. Oxygen coasumption was higher in Lokka. |
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