河口潮間帯干潟の土砂動態に及ぼす潮汐と河川出水の相対的重要度

書誌事項

タイトル別名
  • Relative Importance of Tide and River Discharge on Sediment Transport on Intertidal Flat
  • 津波により形成される岸沖断面地形の時空間変動と波数スペクトル特性
  • カコウ チョウカンタイ ヒガタ ノ ドシャ ドウタイ ニ オヨボス チョウセキ ト カセン シュッスイ ノ ソウタイテキ ジュウヨウド
  • Time-Space Variations and Spectral Evolutions of Sandy Beach Profiles under Tsunami

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抄録

Relative importance of tidal motions and river discharges for the sediment transport was evaluated using field measurements and data analysis on an intertidal flat adjacent to the Shirakawa River mouth. Monthly-averaged sediment budgets during flood periods indicated the different pattern at the closest point to the river mouth. Sediment is transported to north during non-flood period while transported to south during flood period at this point. The basinscale tidal motions are found to be important for the sediment transport during non-flood period. The phase relationships between the peak river discharge and tide level during the flood are most important for the sediment transport on the intertidal flat adjacent to the river mouth in the fetch-limited closed bay.

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