DOI: 10.1002/2016GL069824
论文题名: On how spatial variations of channel width influence river profile curvature
作者: Ferrer-Boix C. ; Chartrand S.M. ; Hassan M.A. ; Martín-Vide J.P. ; Parker G.
刊名: Geophysical Research Letters
ISSN: 0094-9625
EISSN: 1944-9356
出版年: 2016
卷: 43, 期: 12 起始页码: 6313
结束页码: 6323
语种: 英语
英文关键词: morphodynamics
; rivers
Scopus关键词: Flowmeters
; Classical approach
; Longitudinal profile
; Mass conservation
; Morphodynamics
; Spatial variations
; Surface textures
; Theoretical framework
; Water discharges
; Rivers
英文摘要: Longitudinal profiles of alluvial rivers usually exhibit upward-concave curvatures at equilibrium. River profile concavity has been primarily attributed to sediment downstream fining and to streamwise increments of water discharge. Conversely, upward-convex profiles have been typically associated with tectonic and geologic controls and with outlet base-level drops. Equations to describe river profiles at equilibrium developed from mass conservation principles do not consider longitudinal changes in channel width. This study addresses how variations in channel width can also act to control the curvature of longitudinal profiles. We develop a new theoretical framework in which the role on river profiles of downstream variations of channel width, flow discharge, bed roughness, and surface texture are explicitly shown. Unlike classical approaches for river profile evolution, this novel framework identifies physical domains for rivers to develop upward-concave/convex longitudinal profiles depending on channel width and flow discharge gradients flow intensity and surface texture. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84977177559&doi=10.1002%2f2016GL069824&partnerID=40&md5=1713fedfd131683cdbf1f58ac1f10165
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10588
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Geography, University of British Columbia, Vancouver, BC, Canada
Recommended Citation:
Ferrer-Boix C.,Chartrand S.M.,Hassan M.A.,et al. On how spatial variations of channel width influence river profile curvature[J]. Geophysical Research Letters,2016-01-01,43(12).