2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
6/07/2017 | 9:45 AM - 10:00 AM | ESTIMATION OF ECOSYSTEM METABOLISMS BY OPEN DIEL OXYGEN METHOD IN THE MIMI RIVER, JAPAN | 302B
ESTIMATION OF ECOSYSTEM METABOLISMS BY OPEN DIEL OXYGEN METHOD IN THE MIMI RIVER, JAPAN
Quantitative estimation of ecosystem metabolism is significant to understand their functions and suggest sustainable plans for management of ecosystem services. Aquatic ecosystem metabolism can be estimated by monitoring the diel change in dissolved oxygen concentrations. We have been monitoring of water quality items of water temperature, dissolved oxygen, pH, electric conductivity, and turbidity for several years in the large river Mimi River in Kyushu, Japan. We are able to use the discharge data from outlet flow of upstream dam. The mean annual discharge of Mimi River is approximately 45 m3 s-1.There are two main events of heavy precipitation by seasonal rain front and typhoons in Japan of Asian monsoon zone. High discharges of Mimi River were recorded to be more than 1000 m3 s-1 during floods. We investigated accuracy and uncertainty of river metabolism estimations, especially during floods and immediately after floods and tried to evaluate impacts of flood disturbance on river metabolism. We also showed seasonal changes in river metabolism and discussed environmental factors for changes in river metabolism.
- C22 Disturbance
- C10 Biogeochemistry
- C32 Primary and Secondary Production
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Presenters/Authors
Ryosuke Yamamoto
(), Central Research Institute of Electric Power Industry, r-yama@criepi.denken.or.jp;
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Daisuke Nakano
(), Central Research Institute of Electric Power Industry, d-nakano@criepi.denken.or.jp;
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Masahiro Imamura
(), Central Research Institute of Electric Power Industry, mima@criepi.denken.or.jp;
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Ryosuke Yamamoto
(), Central Research Institute of Electric Power Industry, r-yama@criepi.denken.or.jp;
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