干旱区生态环境知识资源中心(Arid): Meandering rivers in modern desert basins: Implications for channel planform controls and prevegetation rivers

Arid

DOI	10.1016/j.sedgeo.2019.03.011
	Meandering rivers in modern desert basins: Implications for channel planform controls and prevegetation rivers
	Santos, Mauricio G. M.1; Hartley, Adrian J.2; Mountney, Nigel P.3; Peakall, Jeff 3; Owen, Amanda 4; Merino, Eder R.5; Assine, Mario L.6
通讯作者	Santos, Mauricio G. M.
来源期刊	SEDIMENTARY GEOLOGY
ISSN	0037-0738
EISSN	1879-0968
出版年	2019
卷号	385 页码:1-14
英文摘要	The influence of biotic processes in controlling the development of meandering channels in fluvial systems is controversial. The majority of the depositional history of the Earth's continents was devoid of significant biogeomorphic interactions, particularly those between vegetation and sedimentation processes. The prevailing perspective has been that prevegetation meandering channels rarely developed and that rivers with braided planforms dominated. However, recently acquired data demonstrate that meandering channel planforms are more widely preserved in prevegetation fluvial successions than previously thought. Understanding the role of prevailing fluvial dynamics in non- and poorly vegetated environments must rely on actualistic models derived from presently active rivers developed in sedimentary basins subject to desert-climate settings, the sparsest vegetated regions experiencing active sedimentation on Earth. These systems have fluvial depositional settings that most closely resemble those present in prevegetation (and extra-terrestrial) environments. Here, we present an analysis based on satellite imagery which reveals that rivers with meandering channel planforms are common in modern sedimentary basins in desert settings. Morphometric analysis of meandering fluvial channel behaviour, where vegetation is absent or highly restricted, shows that modern sparsely and non-vegetated meandering rivers occur across a range of slope gradients and basin settings, and possess a broad range of channel and meander-belt dimensions. The importance of meandering rivers in modem desert settings suggests that their abundance is likely underestimated in the prevegetation rock record, and models for recognition of their deposits need to be improved. (C) 2019 Elsevier B.V. All rights reserved.
英文关键词	Meandering rivers Arid sedimentary basins Prevegetation fluvial deposits Remote sensing Modern analogues Dryland
类型	Article
语种	英语
国家	Brazil ; Scotland ; England
开放获取类型	Green Accepted, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000469306700001
WOS关键词	EARLY LAND PLANTS ; THE-GEOLOGICAL-SOCIETY ; ENVIRONMENTAL CONTROLS ; FLOODPLAIN FORMATION ; RIPARIAN VEGETATION ; ANABRANCHING RIVER ; FLUVIAL DEPOSITS ; NW SCOTLAND ; EVOLUTION ; MORPHODYNAMICS
WOS类目	Geology
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218818
作者单位	1.Univ Fed ABC, CECS, Av Estados 5001, BR-09210580 Santo Andre, Brazil; 2.Univ Aberdeen, Dept Geol & Petr Geol, Aberdeen AB24 3UE, Scotland; 3.Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England; 4.Univ Glasgow, Sch Geog & Earth Sci, Univ Ave, Glasgow, Lanark, Scotland; 5.Univ Sao Paulo, Inst Energy & Environm, Av Prof Luciano Gualberto 1289,Cidade Univ, BR-05508010 Sao Paulo, Brazil; 6.UNESP, Inst Geociencias & Ciencias Exatas, Ave 24A 1515, BR-13506900 Rio Claro, Brazil
推荐引用方式 GB/T 7714	Santos, Mauricio G. M.,Hartley, Adrian J.,Mountney, Nigel P.,et al. Meandering rivers in modern desert basins: Implications for channel planform controls and prevegetation rivers[J],2019,385:1-14.
APA	Santos, Mauricio G. M..,Hartley, Adrian J..,Mountney, Nigel P..,Peakall, Jeff.,Owen, Amanda.,...&Assine, Mario L..(2019).Meandering rivers in modern desert basins: Implications for channel planform controls and prevegetation rivers.SEDIMENTARY GEOLOGY,385,1-14.
MLA	Santos, Mauricio G. M.,et al."Meandering rivers in modern desert basins: Implications for channel planform controls and prevegetation rivers".SEDIMENTARY GEOLOGY 385(2019):1-14.