DOI: 10.1002/2017JF004331
Scopus记录号: 2-s2.0-85042149853
论文题名: A Gradually Varied Approach to Model Turbidity Currents in Submarine Channels
作者: BollaPittaluga M. ; Frascati A. ; Falivene O.
刊名: Journal of Geophysical Research: Earth Surface
ISSN: 21699003
出版年: 2018
卷: 123, 期: 1 起始页码: 80
结束页码: 96
语种: 英语
英文关键词: Monterey Canyon
; morphodynamics
; numerical modeling
; steady flow
; submarine canyons
; turbidity currents
英文摘要: We develop a one-dimensional model to describe the dynamics of turbidity current flowing in submarine channels. We consider the flow as a steady state polydisperse suspension accounting for water detrainment from the clear water-turbid interface, for spatial variations of the channel width and for water and sediment lateral overspill from the channel levees. Moreover, we account for sediment exchange with the bed extending the model to deal with situations where the current meets a nonerodible bed. Results show that when water detrainment is accounted for, the flow thickness becomes approximately constant proceeding downstream. Similarly, in the presence of channel levees, the flow tends to adjust to channel relief through the lateral loss of water and sediment. As more mud is spilled above the levees relative to sand, the flow becomes more sand rich proceeding downstream when lateral overspill is present. Velocity and flow thickness predicted by the model are then validated by showing good agreement with laboratory observations. Finally, the model is applied to the Monterey Canyon bathymetric data matching satisfactorily the December 2002 event field measurements and predicting a runout length consistent with observations. ©2017. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114763
Appears in Collections: 气候减缓与适应
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作者单位: Shell Global Solutions International B.V., Rijswijk, Netherlands; Department of Civil, Chemical and Environmental Engineering, University of Genoa, Genoa, Italy; Shell International Exploration and Production, Houston, TX, United States
Recommended Citation:
BollaPittaluga M.,Frascati A.,Falivene O.. A Gradually Varied Approach to Model Turbidity Currents in Submarine Channels[J]. Journal of Geophysical Research: Earth Surface,2018-01-01,123(1)