Olivier Raynal's research while affiliated with Université de Perpignan and other places

... In the study area, paleoclimatic reconstructions are progressing but are still largely uncertain (e.g. Maley and Vernet, 2015;Certain et al., 2018), particularly with regard to the duration and intensity of dry and wet episodes. Interpretations should be particularly cautious since other regions of the Sahel studied before have illustrated the risk of drawing too quickly regional conclusions from local observations (e.g. ...

... In an early effort, Zenkovich (1967) identified several categories of spits and sedimentary features associated with enclosed lake/lagoon settings exposed to wind waves. More recently, Nutz et al. (2018) defined a new category of lakes, termed 'wind-driven waterbodies' (WWB), that display on their shores features created by wave-related processes and wind-induced water circulation, such as beach ridges or spits, as well as sediment drifts, but also sedimentary shelf progradation and erosional surfaces in deeper, offshore domains (Nutz et al., 2015). The general impact of wind-wave processes on riverderived cohesive sediments in many of these systems remains, however, largely unknown. ...

... On the basis of the similarity principle, the size and experimental conditions of the sand filling model of the beach facies reservoir are determined (Rhome and Ryan, 2009;Qi et al., 2013;Qi et al., 2013;Andredaki et al., 2014;Li et al., 2017;Sun et al., 2017;Yue et al., 2018). A simulation program is designed for a water-flooding experiment, and the movement of injections is observed (Brunel et al., 2014;Congjun et al., 2014;Yin et al., 2016;Gallicchio et al., 2017). Changes in resistivity values are measured during the waterflooding process by employing the electrode in the physical simulation model (Feng et al., 2015;Yin et al., 2015;Zhao et al., 2016;Han et al., 2017). ...

... These sensitive clays have a similar depositional and geological history to late-glacial marine clays deposited in Scandinavia. The specific feature of marine postglacial clays is exceptional sensitivity (ratio of undrained shear strength to remolded shear strength) to disturbances such as overloading, leaching, and earthquakes, whereby all the criteria are met to behave as quick clay [2]. The presence of sensitive clay deposits and their ability to rapidly disintegrate from solid-state to liquidstate makes the SLSJ region an unstable area prone to landslides. ...

... Coastal areas are well-studied, unique, and dynamic systems located between marine and continental environments, and highly dependent on sedimentary and erosive processes, glacio-eustatic oscillations, and tectonic regimes (Lambeck et al., 2011;Ruello et al., 2017;Corrado et al., 2020;Buffardi et al., 2021). The sedimentary sequences preserved within these environments represent high-resolution physical archives and are of primary interest in the Mediterranean region for the palaeoecological evolution of the Late Quaternary and the complex interaction between anthropic and natural forcing mechanisms (Sabatier et al., 2010;Ghilardi et al., 2013;Carmona et al., 2016;Cosentino et al., 2017;Natali and Bianchini, 2018;Emmanouilidis et al., 2020;López-Belzunce et al., 2020;Di Lorenzo et al., 2021). With so many examples of environmental contexts, as well as human strategies and motives for inhabiting these coastal zones, their long-term evolution is neither obvious nor assured. ...

... Besides the variations in RSL, the autogenic factors acting during the evolution of the barrier can generate stratigraphic surfaces with a diachronic nature Barboza et al., 2018). Changes in wave climate induce changes in barrier stratigraphy and depositional architecture when inlets and spits migrate alongshore in response to coastal drift currents (Dominguez et al., 1983;Walker and Plint, 1992;Raynal et al., 2009;Boyd, 2010), reworking barrier and tidal-delta sediments and creating erosive surfaces, such as the Mustang Island aggradational barrier in Texas (Simms et al., 2006). The occurrence of extreme events, on the other hand, can result in critical morphological changes in the shoreline in a short time, including berm accretion (Masselink and van Heteren, 2014) and breaching of spits induced by overtopping and overwashing processes (Robin et al., 2020). ...

... This is particularly true during high frequency changes and exceptional events (Noli et al. 1996;Bencivenga et al. 2000). Generally, coastal risks during the Roman period are expressed in terms of coastline mobility (Vella et al. 2000;Brückner 2019), storms (Sabatier et al. 2010(Sabatier et al. , 2012 or tsunamis (Luque et al. 2002;Dey and Goodman-Tchernov 2010). Studies considering fluvial risks during the Roman period focus mainly on flood intensity and frequency, their extent (Le Gall 1953;Berger et al. 2003;Ollive et al. 2006;Arnaud-Fassetta 2008;Arnaud-Fassetta et al. 2009), and adjustments to water levels (Bravard et al. 1990;Allinne 2007Allinne , 2015Leveau 2017)-with many studies focussing on the 1st c. ...

... The sub-seafloor geology thus plays a key role in OFG evolution. The preservation of OFG in low permeability units is similar to what has been reported by Lofi et al. (2013) using borehole information from a siliciclastic margin. ...

... These processes of basin (river mouth, paleo-valleys) infill controlled by pre-existing geoforms have been interpreted in other places, including the mouth of the river Tagus (Vis et al., 2008(Vis et al., , 2010, the Rhine estuary (Hijma et al., 2009), the Po delta (Rossi and Vaiani, 2008), Brittany (Menier et al., 2010), the Elbe river (Hepp et al., 2019), and the Languedocian lagoons (Raynal et al., 2010). ...

... En réponse, le cordon va reculer vers l'intérieur des terres durant les épisodes de franchissement et submersion. Le lido aurait ensuite trouvé une position plus stable, approximativement proche à celle d'aujourd'hui, il y a 1800 ans BP (RAYNAL, 2008). Aujourd'hui deux directions de fortes houles dominent dans la région, liées aux tempêtes venant du sud et de l'est-sud-est. ...