DOI: 10.1002/2017JC013185
Scopus记录号: 2-s2.0-85041015749
论文题名: Suspended Sediment Dynamics in the Macrotidal Seine Estuary (France): 1. Numerical Modeling of Turbidity Maximum Dynamics
作者: Grasso F. ; Verney R. ; Le Hir P. ; Thouvenin B. ; Schulz E. ; Kervella Y. ; Khojasteh Pour Fard I. ; Lemoine J.-P. ; Dumas F. ; Garnier V.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 1 起始页码: 558
结束页码: 577
语种: 英语
英文关键词: Estuary
; hydrodynamics
; measurement/modeling
; mud/sand
; turbidity maximum
; waves
Scopus关键词: estuarine dynamics
; hydrodynamics
; hydrometeorology
; hysteresis
; intertidal environment
; measurement method
; mud
; numerical model
; river flow
; sand
; suspended sediment
; tidal cycle
; tidal range
; turbidity
; wave force
; France
; Seine Estuary
英文摘要: Tidal pumping, baroclinic circulation, and vertical mixing are known to be the main mechanisms responsible for the estuarine turbidity maximum (ETM) formation. However, the influence of hydro-meteorological conditions on ETM dynamics is still not properly grasped and requires further investigation to be quantified. Based on a realistic three-dimensional numerical model of the macrotidal Seine Estuary (France) that accounts for mud and sand transport processes, the objective of this study is to quantify the influence of the main forcing (river flow, tides, and waves) on the ETM location and mass changes. As expected, the ETM location is strongly modulated by semidiurnal tidal cycles and fortnightly time scales with a high sensitivity to river flow variations. The ETM mass is clearly driven by the tidal range, characteristic of the tidal pumping mechanism. However, it is not significantly affected by the river flow. Energetic wave conditions substantially influence the ETM mass by contributing up to 44% of the maximum mass observed during spring tides and by increasing the mass by a factor of 3 during mean tides compared to calm wave conditions. This means that neglecting wave forcing can result in significantly underestimating the ETM mass in estuarine environments. In addition, neap-to-spring phasing has a strong influence on ETM location and mass through a hysteresis response associated with the delay for tidal pumping and stratification to fully develop. Finally, simulations show that the uppermost limit of the Seine ETM location did not change notably during the last 35 years; however, the seaward limit migrated few kilometers upstream. © 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/114798
Appears in Collections: 气候减缓与适应
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作者单位: IFREMER – DYNECO/DHYSED, Centre de Bretagne, Plouzané, France; Department of Physical Oceanography and Instrumentation, Leibniz Institute for Baltic Sea Research Warnemünde (IOW), Warnemünde, Germany; OPEN OCEAN, Recherche et Développement, Brest, France; Now at University of Isfahan, Isfahan, Iran; Groupement d'Intérêt Public Seine-Aval, Pôle Régional des Savoirs, Rouen, France; Now at Service Hydrographique et Océanographique de la Marine, Brest, France; IFREMER, Univ. Brest, CNRS, IRD, Laboratoire d'Océanographie Physique et Spatiale, IUEM, Plouzané, France
Recommended Citation:
Grasso F.,Verney R.,Le Hir P.,et al. Suspended Sediment Dynamics in the Macrotidal Seine Estuary (France): 1. Numerical Modeling of Turbidity Maximum Dynamics[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(1)