Spillage sedimentation on large river floodplains
Spillage sedimentation on large river floodplains
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DOI：
10.1002/esp.3996
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发表时间：
2017-02
影响因子：
3.3
通讯作者：
J. Lewin;P. Ashworth;Robert J. P. Strick
中科院分区：
文献类型：
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作者：
J. Lewin;P. Ashworth;Robert J. P. Strick
大型河流泛滥平原上的活跃沉积通过各种过程产生；这些过程在这里统称为“溢流沉积”。识别了三组共11种溢流沉积样式，并描述了它们的形成过程。大型河流泛滥平原上的形态表现出活跃溢流样式的不同组合。只有一些大型泛滥平原堤防突出，一些河床沙质较粗，许多有辅助河道消散和改造，而一些下游则以湖相环境中的静水沉积为主。填充物也通常流入与主流河道带内以前的迁移有关的先前的、通常是线性的负面起伏形式。
Active deposition across the floodplains of large rivers arises through a variety of processes; collectively these are here termed ‘spillage sedimentation’. Three groups of 11 spillage sedimentation styles are identified and their formative processes described. Form presences on large river floodplains show different combinations of active spillage styles. Only some large floodplains have prominent levees; some have coarse splays; many have accessory channel dispersion and reworking, while still‐water sedimentation in lacustrine environments dominates some lower reaches. Infills are also commonly funnelled into prior, and often linear, negative relief forms relating to former migration within the mainstream channel belt.