Sediment dynamics during wet and dry storm events on the Têt inner shelf (SW Gulf of Lions)

Guillén, Jorge; Bourrin, François; Palanqués, Albert; Madron, Xavier Durrieu de; Puig, Pere; Buscail, Roselyne

doi:10.1016/j.margeo.2006.09.018

Cited by 119 publications

(121 citation statements)

References 34 publications

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“…9). The water and sediment discharge of the Têt, as estimated by Guillén et al (2006), were very low compared to the previous storm (only 450 t of sediment compared to 20 000 t in December). Wind and waves were thus the predominant forcing during this storm.…”

Section: The Storm Of 21 February 2004mentioning

confidence: 76%

“…During the sampling period, two major storms occurred, one on 4 December 2003 and another on 21 February 2004 (Guillén et al, 2006). We focus on the second storm since more data are available for this period.…”

Section: The Storm Of 21 February 2004mentioning

confidence: 99%

“…We focus on the second storm since more data are available for this period. The storm was characterized at SOPAT by a maximum significant wave height H s > 7 m and a peak period T > 12 s, with a westward peak direction (Guillén et al, 2006). At SODAT, significant wave height reached 6 m at 5 a.m. (Figs.…”

Section: The Storm Of 21 February 2004mentioning

confidence: 99%

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Three-dimensional modelling of wave-induced current from the surf zone to the inner shelf

et al. 2012

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Abstract. We develop and implement a new method to take into account the impact of waves into the 3-D circulation model SYMPHONIE (Marsaleix et al., 2008(Marsaleix et al., , 2009a following the simplified equations of , which use glm2z-RANS theory (Ardhuin et al., 2008c). These adiabatic equations are completed by additional parameterizations of wave breaking, bottom friction and wave-enhanced vertical mixing, making the forcing valid from the surf zone through to the open ocean. The wave forcing is performed by wave generation and propagation models WAVEWATCH III ® (Tolman, 2008(Tolman, , 2009Ardhuin et al., 2010) and SWAN (Booij et al., 1999). The model is tested and compared with other models for a plane beach test case, previously tested by Haas and Warner (2009) Finally, a realistic case is simulated with energetic waves travelling over a coast of the Gulf of Lion (in the northwest of the Mediterranean Sea) for which currents are available at different depths as well as an accurate bathymetric database of the 0-10 m depth range. A grid nesting approach is used to account for the different forcings acting at different spatial scales. The simulation coupling the effects of waves and currents is successful to reproduce the powerful northward littoral drift in the 0-15 m depth zone. More precisely, two distinct cases are identified: When waves have a normal angle of incidence with the coast, they are responsible for complex circulation cells and rip currents in the surf zone, and when they travel obliquely, they generate a northward littoral drift. These features are more complicated than in the test cases, due to the complex bathymetry and the consideration of wind and non-stationary processes. Wave impacts in the inner shelf are less visible since wind and regional circulation seem to be the predominant forcings. Besides, a discrepancy between model and observations is noted at that scale, possibly linked to an underestimation of the wind stress.This three-dimensional method allows a good representation of vertical current profiles and permits the calculation of the shear stress associated with waves and currents. Future work will focus on the combination with a sediment transport model.

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Section: The Storm Of 21 February 2004mentioning

confidence: 76%

Section: The Storm Of 21 February 2004mentioning

confidence: 99%

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Three-dimensional modelling of wave-induced current from the surf zone to the inner shelf

et al. 2012

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“…Observational studies have revealed that, in many coastal environments, episodic storms dominate sediment fluxes and subsequent dispersal patterns (Sherwood et al 1994, Warner et al 2008a, Bever et al 2011, Grifoll et al 2013a. The sediment flux during storm events can be several orders of magnitude larger than during calm conditions (Guillén et al 2006, Ulses et al 2008, Bever et al 2011. In consequence, preferential depositional patterns during river floods can partially explain long-term fine deposits observed on the sea floor (Ogston et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Sediment Transport and Dispersal in the Nearshore of “Flash-Flood” Rivers.

Grifoll¹,

Gràcia²,

Guillén³

et al. 2014

Int. Conf. Coastal. Eng.

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River sediment dispersal on the near-shore of "flash-flood" rivers is investigated using a coupled wave-currentsediment transport model. Besòs and Llobregat rivers (short and mountainous rivers in NW Mediterranean Sea, near to Barcelona City) are used as examples to study the sediment transport under "flash-flood" regime. The modeling system COWAST which includes the coupling between the water circulation model ROMS and the wave model SWAN, is applied to assess the sediment dispersal mechanisms and deposition in the coastal area off the two river mouths. Preferential depositional areas such as mud-belts were identified from the simulations. The sediment dispersal pattern obtained by the model agrees with observational measurments. Complementary numerical simulations revealed sorting of sediment grain size in the cross-shelf direction.

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“…Guillén et al, 2006;Palanques et al, 2006Palanques et al, , 2009 dealing with different subjects and discussing specific details of each observational experiment. Therefore, the aim of this paper is to combine the various datasets collected simultaneously in this margin within the frame of different projects and illustrate the effects of severe storms on the Gulf of Lions (GoL), transporting sediment particles and associated elements from the shelf down to the basin.…”

Section: Introductionmentioning

confidence: 99%

Effects of storm events on the shelf-to-basin sediment transport in the southwestern end of the Gulf of Lions (Northwestern Mediterranean)

Palanqués

Puig

Guillén

et al. 2011

Nat. Hazards Earth Syst. Sci.

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Abstract. Shelf-to-basin sediment transport during storms was studied at the southwestern end of the Gulf of Lions from November 2003 to March 2004. Waves, near-bottom currents, temperature and sediment fluxes were measured on the inner shelf at 28-m depth, in the Cap de Creus submarine canyon head at 300-m depth and in the northwestern Mediterranean basin at 2350-m depth. This paper is a synthesis of results published separately in different papers; it includes some new data and focusses on the subject of storms. It is the first paper in which simultaneous data about the effect of storms on the shelf, the slope and in the basin are shown together. During the winter studied, there were two severe E-SE storms with significant wave heights

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Sediment dynamics during wet and dry storm events on the Têt inner shelf (SW Gulf of Lions)

Cited by 119 publications

References 34 publications

Three-dimensional modelling of wave-induced current from the surf zone to the inner shelf

Three-dimensional modelling of wave-induced current from the surf zone to the inner shelf

Sediment Transport and Dispersal in the Nearshore of “Flash-Flood” Rivers.

Effects of storm events on the shelf-to-basin sediment transport in the southwestern end of the Gulf of Lions (Northwestern Mediterranean)

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