The role of landslides in mountain range evolution.
The role of landslides in mountain range evolution.
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DOI：
10.1016/j.geomorph.2009.09.017
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发表时间：
2010-08
期刊：
影响因子：
3.9
通讯作者：
O. Korup;A. Densmore;F. Schlunegger
中科院分区：
文献类型：
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作者：
O. Korup;A. Densmore;F. Schlunegger
我们回顾了滑坡在当前山脉地形发展概念中的作用。我们发现，在这一领域的许多研究解决盆地或造山带规模的岩石隆起和河流基岩侵蚀之间的竞争。通常认为，一般的山坡，特别是基岩滑坡，会对河流排水网络的切割和发展做出快速反应。这导致了一种片面的观点，即山坡和河流之间的地貌耦合，强调河流控制山坡，但忽视了另一种观点，即滑坡可以影响河流网络。有越来越多的证据表明，滑坡是山区沉积物的主要来源，它们对河流过程施加直接的地貌控制。滑坡可以以多种方式影响河流网络，从确定流域面积和排水分水岭位置，到确定沉积物负荷和口径的流向变化。山坡和通道形态的大型滑坡的地貌遗产可能会持续长达104年，增加了相当大的变化，河流侵蚀和沉积模式在这些时间尺度。我们确定了一些问题，为今后的研究和结论，更好地理解和量化的地貌之间的反馈滑坡和河道建立了一个重要的联系短期（<101年）的过程研究和长期（> 105年）景观演化模型。
We review the role of landslides in current concepts of the topographic development of mountain ranges. We find that many studies in this field address basin- or orogen-scale competition between rock uplift and fluvial bedrock erosion. Hillslopes in general, and bedrock landslides in particular, are often assumed to respond rapidly to incision and development of the fluvial drainage network. This leads to a one-sided view of the geomorphic coupling between hillslopes and rivers that emphasizes the fluvial control of hillslopes, but ignores the alternative view that landslides can affect the fluvial network. There is growing evidence that landslides are a dominant source of sediment in mountain belts and that they exert a direct geomorphic control on fluvial processes. Landslides can influence the river network in a variety of ways, from determining basin area and drainage divide positions, to setting streamwise variations in sediment load and calibre. The geomorphic legacy of large landslides on hillslope and channel morphologies may persist for up to 104yr, adding considerable variability to fluvial erosion and sedimentation patterns over these timescales. We identify a number of questions for future research and conclude that a better understanding and quantification of the geomorphic feedbacks between landslides and river channels builds an important link between short-term (<101yr) process studies and long-term (>105yr) landscape evolution models.