Influence of flushing on the estuarine tidal flat ecosystem developed in the mouth of Ohtagawa flood way

Bibliographic Information

Other Title
  • 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.

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Details 詳細情報について

  • CRID
    1390001204112273280
  • NII Article ID
    130003949576
  • DOI
    10.11532/proes1992.45.59
  • ISSN
    1884829X
    13415115
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
    • KAKEN
    • Crossref
  • Abstract License Flag
    Disallowed

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