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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Morphology and dynamics of the intertidal floodplain along the Amazon tidal river
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Morphology and dynamics of the intertidal floodplain along the Amazon tidal river

机译：亚马逊潮汐河跨境洪泛平原的形态和动态

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Depositional environments along the tidal river downstream of & Oacute; bidos have been proposed as important sinks for up to one third of the sediment discharge from the Amazon River. However, the morphology of the intertidal floodplain and the dynamics of sediment exchange along this reach have yet to be described. River-bank surveys in five regions along the Amazon tidal river reveal a distinct transition in bank morphology between the upper, central and lower reaches of the tidal river. The upper tidal-river floodplain is defined by prominent natural levees that control the transfer of water and sediment between the mainstem Amazon River and its floodplain. Greater tidal influence in the central tidal river suppresses levee development, and tidal currents increase sediment transport into the distal parts of the floodplain. In the lower tidal river, the floodplain morphology closely resembles marine intertidal environments (e.g. mud flats, salt marshes), with dendritic tidal channels incising elevated vegetated flats. Theory, morphology and geochronology suggest that the dynamics of sediment delivery to the intertidal floodplain of the Amazon tidal river vary along its length due to the relative influence and coupling of fluvial and tidal dynamics. (c) 2018 John Wiley & Sons, Ltd.
机译：沿着潮汐河的沉积环境下游＆Oacute; Bidos已被提出为亚马逊河沉积物排放的最多三分之一的重要汇。然而，迄今尚未描述跨境洪泛区的形态和沉积物交换的动态。亚马逊潮汐河沿五个地区的河岸调查揭示了潮汐河上游，中部和下游之间的银行形态的截然不同。上部潮汐河洪泛区是由突出的自然纹理定义，可控制主干亚马逊河流和洪泛区之间的水和沉积物的转移。中央潮汐河流造成较大的潮汐影响抑制了堤防发展，潮流将沉积物运输到洪泛区的远端部分。在较低的潮汐河中，洪泛区形态与海洋潮间环境（例如泥浆平面，盐沼）相比，具有升高的植物单位的树突潮汐渠道。理论，形态和地质学报表明，由于河流和潮汐动力学的相对影响和耦合，亚马逊潮汐河跨境洪泛区的沉积物交付动态沿其长度变化。 （c）2018 John Wiley＆Sons，Ltd。

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