Influence of flushing on the estuarine tidal flat ecosystem developed in the mouth of Ohtagawa flood way
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- WATAYA Shinichi
- Graduate School of Science and Engineering, Yamaguchi University
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- NAKANO Yoichi
- Department of Chemical and Biological Engineering, Ube National College of Technology
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- IMAI Tsuyoshi
- Graduate School of Science and Engineering, Yamaguchi University
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- NAKAI Satoshi
- Graduate School of Engineering, Hiroshima University
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- NISHIJIMA Wataru
- Environmental Safety Center, Hiroshima University
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- OKADA Mitsumasa
- Graduate School of Engineering, Hiroshima University
Bibliographic Information
- Other Title
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- 太田川放水路における汽水干潟生態系に及ぼす増水の影響
Description
The Ohtagawa flood way is connected with Ohtagawa river via Gion floodgate. Under the normal times, the discharge water volume for the Ohtagawa flood way is maintained to keep its structure and functions, such as biological productions, however flushing is carried out in the case of a heavy rain which may cause flooding of Ohtagawa river. The flushing inevitably disturbs the tidal flat ecosystem developed in the flood way. This research was carried out to investigate how the flushing disturbs the estuarine tidal flat ecosystem developed in the mouth of Ohta flood way. The flushing caused runoff of the tidal flat surface soil and/or macrobenthos, of which degrees were dependent on the water volume and the period of flushing. The measurement of the tidal flat surface level revealed that about 10 cm of the surface soil was run off by the flushing in 2006 with 5.57m of water level measured at Yaguchi-daiichi observing station, while that with 8.81 m in 2005 vanished 50% of the macrobenthic population. After the flushing, the level of the tidal flat surface and macrobenthic population were finally recovered to the original conditions.
Journal
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- ENVIRONMENTAL ENGINEERING RESEARCH
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ENVIRONMENTAL ENGINEERING RESEARCH 45 59-64, 2008
Japan Society of Civil Engineers
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Details 詳細情報について
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- CRID
- 1390001204112273280
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- NII Article ID
- 130003949576
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- ISSN
- 1884829X
- 13415115
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- Text Lang
- ja
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- Data Source
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- JaLC
- CiNii Articles
- KAKEN
- Crossref
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- Abstract License Flag
- Disallowed