Mapping the interactions between rivers and sand dunes: Implications for fluvial and aeolian geomorphology
Mapping the interactions between rivers and sand dunes: Implications for fluvial and aeolian geomorphology
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DOI：
10.1016/j.geomorph.2014.12.011
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发表时间：
2015-02-15
期刊：
影响因子：
3.9
通讯作者：
Coulthard, Tom J.
中科院分区：
文献类型：
--
作者：
Liu, Baoli;Coulthard, Tom J.
河流和风成作用的相互作用可以显著改变地球表面的形态。当河流和沙丘相遇时，两个系统之间泥沙输运的相互作用会导致其中一个或两个系统的变化。然而，这两个系统通常是独立研究的，这就留下了许多关于它们如何相互作用的问题。本文进行了全球清查，利用卫星图像，以确定230个网站，有显着的河流风成作用。在每个位置的关键属性，如风/河流方向，净输沙方向，河流-风成交汇角，沙丘类型和河道格局进行了识别，并分析了每个因素之间的关系。从这些数据中，六种不同类型的相互作用进行了分类，反映了河流和风成系统之间的主导地位的转变。这种分类的结果证实，只有某些类型的相互作用是显着的：会议的角度和沙丘类型，会议的角度和相互作用类型，最后的通道模式和相互作用类型。然而，研究结果也表明，从快照卫星图像分类动态地貌系统的困难。(C)2014爱思唯尔有限公司版权所有。
The interaction between fluvial and aeolian processes can significantly change Earth surface morphology. When rivers and sand dunes meet, the interaction of sediment transport between the two systems can lead to change in either or both systems. However, these two systems are usually studied independently, which leaves many questions unresolved in terms of how they interact. This paper carries out a global inventory, using satellite imagery, to identify 230 sites where there are significant fluvial-aeolian interactions. At each location key attributes such as wind/river direction, net sand transport direction, fluvial-aeolian meeting angle, dune type and river channel pattern were identified and relationships between each factor were analysed. From these data, six different types of interaction were classified that reflect a shift in dominance between the fluvial and aeolian systems. Results from this classification confirm that only certain types of interaction were significant: the meeting angle and dune type, the meeting angle and interaction type and finally the channel pattern and interaction type. However, the findings also indicate the difficulties of classifying dynamic geomorphic systems from snapshot satellite images. (C) 2014 Elsevier B.V. All rights reserved.