Buried sandbodies within present-day estuaries (Atlantic coast of France) revealed by very high resolution seismic surveys

Chaumillon, Éric; Tessier, Bernadette; Weber, Nicolas; Tesson, Michel; Bertin, Xavier

doi:10.1016/j.margeo.2004.07.004

Cited by 34 publications

(43 citation statements)

References 24 publications

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“…The Pertuis Charentais area was chosen because it has received much attention over recent decades, with abundant stratigraphical, sedimentological and geochronological data (Allard et al, 2008(Allard et al, , 2010Bertin et al, 2008;Bertin and Chaumillon, 2006;Billeaud et al, 2005;Chaumillon et al, 2008Chaumillon et al, , 2004Chaumillon and Weber, 2006;Poirier et al, 2011;Weber et al, 2004a,b). Previous studies have demonstrated the vulnerability of the Pertuis Charentais to storm events (Baumann et al, 2017a,b;Breilh et al, 2014), and its ability to record climate changes of the past centuries to decades (Allard et al, 2008;Poirier et al, 2011Poirier et al, , 2017.…”

Section: Study Areamentioning

confidence: 99%

“…Coarse-grained sediment infilling of the Pertuis Charentais is capped by a silt drape (ca. 820 km 2 large, 1 to 1.5 m thick on average) that lies unconformably on older sand deposits (Billeaud et al, 2005;Chaumillon et al, 2004) and formed since about the 18th century (Poirier et al, 2011). Fine-grained sediment supply and trapping increased as a result of deforestation on catchments (Poirier et al, 2011), coastal marsh reclamation (Allard et al, 2008) and oyster farming (Bertin and Chaumillon, 2006).…”

Section: Holocene Evolutionmentioning

confidence: 99%

“…Existing 14 C ages were published in regional monographs (Gabet, 1981;Regrain, 1980), in radiocarbon laboratory reports (Delibrias et al, 1974(Delibrias et al, , 1982 and in peer-reviewed articles (Allard et al, 2010;Chaumillon et al, 2004;Chaumillon and Weber, 2006;Poirier et al, 2011).…”

Section: Existing Datamentioning

confidence: 99%

See 2 more Smart Citations

Climate control on late Holocene high-energy sedimentation along coasts of the northeastern Atlantic Ocean

Poirier

Tessier

Chaumillon

2017

Palaeogeography, Palaeoclimatology, Palaeoecology

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Section: Study Areamentioning

confidence: 99%

Section: Holocene Evolutionmentioning

confidence: 99%

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Climate control on late Holocene high-energy sedimentation along coasts of the northeastern Atlantic Ocean

Poirier

Tessier

Chaumillon

2017

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…1). The natural infilling of those marshes was enhanced by anthropogenic activities, mainly deforestation (Poirier et al, 2011) and land reclamation (Allard et al, 2008;Bertin et al, 2005;Chaumillon et al, 2004).…”

Section: Geomorphologic Settingmentioning

confidence: 99%

Assessment of static flood modeling techniques: application to contrasting marshes flooded during Xynthia (western France)

Breilh

Chaumillon

Bertin

et al. 2013

Nat. Hazards Earth Syst. Sci.

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This study aims to assess the performance of raster-based flood modeling methods on a wide diversity of coastal marshes. These methods are applied to the flooding associated with the storm Xynthia, which severely hit the western coast of France in February 2010. Static and semi-dynamic methods are assessed using a combination of LiDAR data, post-storm delineation of flooded areas and sea levels originating from both tide gauge measurements and storm surge modeling. Static methods are applied to 27 marshes showing a wide geomorphological diversity. It appears that these methods are suitable for marshes with a small distance between the coastline and the landward boundary of the marsh, which causes these marshes to flood rapidly. On the contrary, these methods overpredict flooded areas for large marshes where the distance between the coastline and the landward boundary of the marsh is large, because the flooding cannot be considered as instantaneous. In this case, semi-dynamic methods based on surge overflowing volume calculations can improve the flooding prediction significantly. This study suggests that static and semi-dynamic flood modeling methods can be attractive and quickly deployed to rapidly produce predictive flood maps of vulnerable areas under certain conditions, particularly for small distances between the coastline and the landward boundary of the low-lying coastal area

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“…Holocene sediment fill of the area was investigated with very high resolution seismic surveys (>3100 km in total) groundtruthed by 14 C-dated sediment cores (99 cores, 44 dates obtained on mollusc shells), with particular emphasis on the tide-dominated Marennes-Olé ron Bay (Allard et al, 2010;Billeaud et al, 2005;Chaumillon and Weber, 2006;Chaumillon et al, 2004;Poirier et al, 2011, Fig. 1a).…”

Section: Historical Changes In Estuarine Sedimentationmentioning

confidence: 99%

Comparison of estuarine sediment record with modelled rates of sediment supply from a western European catchment since 1500

Poirier

Poitevin

Chaumillon

2015

Comptes Rendus. Géoscience

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International audienceMarine and estuarine sediment records reporting impacts of historical land use changes exist worldwide, but they are rarely supported by direct quantified evidence of changes in denudation rates on the related catchments. Here we implement a spatially-resolved RUSLE soil erosion model on the 10 000 km2 Charente catchment (France), supplied with realistic scenarios of land-cover and climate changes since 1500, and compare the results to a 14C-dated estuarine sediment record. Despite approximations, the model correctly predicts present-day Charente river sediment load. Back-cast modelling suggests that the Charente catchment is an interesting case where the sediment supply did not change despite increase in soil erosion resulting from 18th-century deforestation because it was mitigated by drier climate during the same period. Silt-sand alternations evidenced in the sediment record were correlated with sub-decadal rainfall variability

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Buried sandbodies within present-day estuaries (Atlantic coast of France) revealed by very high resolution seismic surveys

Cited by 34 publications

References 24 publications

Climate control on late Holocene high-energy sedimentation along coasts of the northeastern Atlantic Ocean

Climate control on late Holocene high-energy sedimentation along coasts of the northeastern Atlantic Ocean

Assessment of static flood modeling techniques: application to contrasting marshes flooded during Xynthia (western France)

Comparison of estuarine sediment record with modelled rates of sediment supply from a western European catchment since 1500

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