Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1127/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
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ISSN | 0372-8854 |
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 |
推荐引用方式 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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