Arid
DOI10.1127/zfg/2016/0223
Channel processes and sedimentology of a boulder-bed ephemeral stream in the western Afar margin
Billi, Paolo
通讯作者Billi, Paolo
来源期刊ZEITSCHRIFT FUR GEOMORPHOLOGIE
ISSN0372-8854
出版年2016
卷号60期号:1页码:35-52
英文摘要

Few papers report and very little is known about the geomorphology and sedimentology of present day very coarse-grained, ephemeral streams. This paper aims to shed some light on fluvial processes acting in this kind of drylands rivers and to provide some insight into their sedimentological characteristics as a diagnostic tool for the interpretation of ancient deposits. Such topics are investigated in a field study on the Golina River, a sandy boulder bed ephemeral stream of the Kobo basin in northern Ethiopia, subjected to intermittent flow generated by episodic, high intensity rainfall. Though the main gemorphological characteristics of the braid bars and channels are apparently similar to those of perennial rivers, field investigations show that the channel morphology and sedimentology of the study reach result from different depositional/erosion processes. A model based on the superimposition of coarse-grained bedload sheets, with the characteristics described by Whiting et al. (1988), and subsequent dissection during the receding flood flow is considered. This model was found to explain well the morphological and sedimentological features observed in the investigated boulder-bed, ephemeral stream.


英文关键词Ephemeral stream bedload sheet boulder-bed braided river Ethiopia
类型Article
语种英语
国家Italy
收录类别SCI-E
WOS记录号WOS:000374426300004
WOS关键词KICKING-HORSE-RIVER ; FLASH-FLOOD ; BAR EVOLUTION ; KOBO BASIN ; HIGH-RATES ; DEPOSITS ; TRANSPORT ; GRAVEL ; MORPHOLOGY ; DESERT
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/196880
作者单位Univ Ferrara, Dipartimento Fis & Sci Terra, Via G Saragat 1, I-44122 Ferrara, Italy
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GB/T 7714
Billi, Paolo. Channel processes and sedimentology of a boulder-bed ephemeral stream in the western Afar margin[J],2016,60(1):35-52.
APA Billi, Paolo.(2016).Channel processes and sedimentology of a boulder-bed ephemeral stream in the western Afar margin.ZEITSCHRIFT FUR GEOMORPHOLOGIE,60(1),35-52.
MLA Billi, Paolo."Channel processes and sedimentology of a boulder-bed ephemeral stream in the western Afar margin".ZEITSCHRIFT FUR GEOMORPHOLOGIE 60.1(2016):35-52.
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