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DOI	10.1002/esp.4640
	Fluvial incision and coarse gravel redistribution across the modern Dead Sea shelf as a result of base-level fall
	Eyal, Haggai 1,2; Dente, Elad 1,2; Haviv, Itai 3; Enzel, Yehouda1 ; Dunne, Thomas 4; Lensky, Nadav G.2
通讯作者	Lensky, Nadav G.
来源期刊	EARTH SURFACE PROCESSES AND LANDFORMS
ISSN	0197-9337
EISSN	1096-9837
出版年	2019
卷号	44 期号:11 页码:2170-2185
英文摘要	Global eustatic lowstands can expose vast areas of continental shelves, and occasionally the shelf edge and the continental slope. The degree of fluvial connectivity to receding shores influences the redistribution of sediments across these emerging landscapes. Shelf and slope emergence in the Dead Sea since the middle of the 20th century, offers a rare opportunity to examine evolution of stream connectivity in response to continuous base-level decline. We characterize the connectivity evolution of two streams, using high-resolution time series of aerial imagery and elevation models, field mapping, and grain-size analyses. Our rich spatiotemporal dataset of evolving channel geomorphology, sediment transport conditions, and sediment redistribution, allows calculating potential coarse sediment mobility in response to base level decline. Following shelf emergence, alluvial fans first prograded onto the low-gradient shelf under unfavourable conditions for transporting coarse sediment to the regressing shoreline. Then, with shelf and slope emergence, the two adjacent streams evolved differently. The smaller, more arid watershed still maintains its highstand delta progradation on the shelf and is practically disconnected from the receding lake. The larger catchment, heading in wetter environments and having a narrower shelf, has incised the shelf and renewed and gradually intensified the sediment transport from the highstand to the lowstand delta. Sediment mobilization to lowstand shorelines is controlled by the evolution of the channel profile and by the average speed of gravel transport (10s-100s m yr(-1)). These findings from the Dead Sea are relevant to fluvial processes operating on continental shelves during glacial maxima. Streams would have commonly stored high proportions of their coarse sediment on the continental shelves rather than efficiently connecting with the lowstand level. Additionally, differences in sediment routing patterns should exist among nearby streams, primarily due to continental margin geometry and watershed hydrology. (c) 2019 John Wiley & Sons, Ltd.
英文关键词	cross-shelf channel sediment redistribution coarse sediment bypass channel incision continental shelf emergence
类型	Article
语种	英语
国家	Israel ; USA
收录类别	SCI-E
WOS记录号	WOS:000485973700006
WOS关键词	LAST GLACIAL MAXIMUM ; ALLUVIAL CHANNELS ; CLIMATE ; SYSTEMS ; BED ; GEOMORPHOLOGY ; STRATIGRAPHY ; ENTRAINMENT ; VALLEYS ; EXAMPLE
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	Ben-Gurion University of the Negev ; Hebrew University of Jerusalem
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215093
作者单位	1.Hebrew Univ Jerusalem, Freddy & Nadin Herrmann Inst Earth Sci, Edmond J Safra Campus, IL-91904 Jerusalem, Israel; 2.Geol Survey Israel, 32 Yeshayahu Leibowitz, IL-9371234 Jerusalem, Israel; 3.Ben Gurion Univ Negev, Dept Geol & Environm Sci, IL-84105 Beer Sheva, Israel; 4.Univ Calif Santa Barbara, Bren Sch Environm Sci & Management, Santa Barbara, CA 93106 USA
推荐引用方式 GB/T 7714	Eyal, Haggai,Dente, Elad,Haviv, Itai,et al. Fluvial incision and coarse gravel redistribution across the modern Dead Sea shelf as a result of base-level fall[J]. Ben-Gurion University of the Negev, Hebrew University of Jerusalem,2019,44(11):2170-2185.
APA	Eyal, Haggai,Dente, Elad,Haviv, Itai,Enzel, Yehouda,Dunne, Thomas,&Lensky, Nadav G..(2019).Fluvial incision and coarse gravel redistribution across the modern Dead Sea shelf as a result of base-level fall.EARTH SURFACE PROCESSES AND LANDFORMS,44(11),2170-2185.
MLA	Eyal, Haggai,et al."Fluvial incision and coarse gravel redistribution across the modern Dead Sea shelf as a result of base-level fall".EARTH SURFACE PROCESSES AND LANDFORMS 44.11(2019):2170-2185.