What is a fluvial levee?
What is a fluvial levee?
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DOI：
10.1016/s0037-0738(97)00114-0
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发表时间：
1997-12-01
影响因子：
2.8
通讯作者：
Woolfe, KJ
中科院分区：
文献类型：
--
作者：
Brierley, GJ;Ferguson, RJ;Woolfe, KJ
防洪堤是河道和洪泛区之间的高架分隔物。由于其性质和位置，堤坝可以提供关键的控制，并了解，地貌过程，确定河流系统内的水和沉积物的分布。对现代沉积环境中形成堤坝的特征、分布、沉积学和过程的研究很少。从密西西比河堤坝沉积物的特点继续形成的基础上，大多数堤坝解释的岩石记录。这篇讨论论文评估了岩石记录中大量实例中堤坝沉积物解释的可靠性，以及它们对河流风格的相关推断。这种不确定性反映了缺乏明确的沉积学属性的堤坝存款，其有限的保存潜力，以及事实上，堤坝识别的岩石记录是抑制依赖于几何描述符或通道和河漫滩相之间的间接关联。鉴于这些问题，建议地貌学家和沉积学家需要认识到我们目前的堤坝知识的局限性，并朝着更系统地了解这些重要的河流地貌在现代（和古代）河流设置的全方位。
Fluvial levees are elevated partitions between channels and floodplains. Because of their character and position, levees may provide critical controls on, and insights into, geomorphic processes that determine the distribution of water and sediment within river systems. Few studies have analysed the character, distribution, sedimentology and processes that form levees in modem depositional environments. Characterisation of levee deposits from the Mississippi River continues to form the basis for most levee interpretations from the rock record. This discussion paper assesses the reliability of interpretations of levee deposits in numerous examples from the rock record, and their associated inferences for river style. This uncertainty reflects the lack of definitive sedimentological attributes for levee deposits, their limited preservation potential, and the fact that levee identification in the rock record is inhibited by the reliance on geometric descriptors or indirect associations between channel and floodplain facies. Given these concerns, it is suggested that geomorphologists and sedimentologists need to recognise the limitations of our present knowledge of levees, and work towards a more systematic understanding of these significant fluvial landforms in the full spectrum of modem (and ancient) river settings.