R. Aalto and C. Nittrouer, 210Pb geochronology of flood events in large tropical river systems, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, vol.46, issue.4, pp.2040-2074, 2012.
DOI : 10.1130/0016-7606(1998)110<0450:EOSBTF>2.3.CO;2

P. G. Appleby and F. Oldfield, The calculation of Pb-210 dates assuming a constant rate of 653 supply of unsupported Pb-210 to the sediment, pp.1-8, 1978.

P. Appleby and F. Oldfield, Application of lead-210 tosedimentation studies, Uranium Series Disequilibrium, Applicationto Earth, p.656, 1992.

B. F. Atwater, D. A. Trumm, J. D. Tinsley, . Iii, R. S. Stein et al., Alluvial plains and earthquake recurrence at the Coalinga 659 anticline, The Coalinga, California, Earthquake of 660 96, pp.79-99, 1990.

V. R. Baker and R. C. Kochel, Flood sedimentation in bedrock fluvial systems, Flood Geomorphology, pp.123-665, 1988.

V. R. Baker, R. H. Webb, and P. K. House, The scientific and societal value of paleoflood 667 hydrology Ancient Floods, p.668, 2002.

Y. Enzel, A. Bardossy, D. Coeur, and B. Bobee, Use of systematic, palaeoflood and 677 historical data for the improvement of flood risk estimation. Review of scientific methods, 2004.

G. Benito and V. R. Thorndycraft, Palaeoflood hydrology and its role in applied hydrological sciences, Journal of Hydrology, vol.313, issue.1-2, pp.3-15, 2005.
DOI : 10.1016/j.jhydrol.2005.02.002

G. Saulnier, Hydrologic and hydraulic distributed modelling with radar rainfall 683 input: reconstruction of the 8-9, catastrophic flood event in the Gard region, p.684, 2002.

. Datations-au-137cs, 134Cs et 210Pb de dépôts de crues du XXe siècle. Datation, XXIe 687 rencontres internationales d'archéologie et d'histoire d'Antibes, pp.141-157

A. Cremers, A. Elsen, P. De-preter, and A. Maes, Quantitative analysis of radiocaesium 689 retention in soils, pp.247-249, 1988.

B. E. Davies and J. Lewin, Chronosequences in alluvial soils with special reference to historic lead pollution in Cardiganshire, Wales, Environmental Pollution (1970), vol.6, issue.1, pp.49-57, 1974.
DOI : 10.1016/0013-9327(74)90046-9

K. El-kadi-abderrezzak and A. Paquier, One-dimensional numerical modeling of sediment 694 transport and bed deformation in open channels, Water Resour. Res, vol.45, p.695, 2009.

F. Elbaz-poulichet, O. Bruneel, and C. Casiot, The Carnoules mine. Generation of As-rich 696 acid mine drainage, natural attenuation processes and solutions for passive in-situ 697 remediation, Documentation IRD, pp.1-8, 2006.
URL : https://hal.archives-ouvertes.fr/hal-00184269

L. L. Ely, R. H. Webb, and Y. Enzel, Accuracy of post-bomb 137Cs and 14C in dating fluvial deposits, Quaternary Research, vol.1, issue.2, pp.196-204, 1992.
DOI : 10.1016/0033-5894(92)90056-O

L. Evans, Dating methods of Pleistocene deposits and their problems. VII. Paleosols, p.706, 1985.

D. G. Gavin, Estimation of inbuilt age in radiocarbon ages of soil charcoal for fire history 709 studies. Radiocarbon43, pp.27-44, 2001.

E. Golberg, Geochronology with 210Pb. Radioactive Dating. International Atomic, p.711, 1963.

Q. He and D. E. Walling, Interpreting particle size effects in the adsorption of 137Cs and unsupported 210Pb by mineral soils and sediments, Journal of Environmental Radioactivity, vol.30, issue.2, pp.117-137, 1996.
DOI : 10.1016/0265-931X(96)89275-7

R. Hindel, J. Schalich, W. De-vos, J. Ebbing, R. Swennen et al., Vertical 715 distribution of elements in overbank sediment profiles from Belgium, 1996.

P. K. House, P. A. Pearthree, and J. E. Klawon, Historical Flood and Paleoflood Chronology 718 of the Lower Verde River, Arizona: Stratigraphic Evidence and Related Uncertainties, p.719, 2002.

. Fraçaise, Available at the Internet site: 726 http

J. C. Knox and J. M. Daniels, Watershed Scale and the Stratigraphic Record of Large Floods, p.728, 2002.
DOI : 10.1029/WS005p0237

R. C. Kochel and V. R. Baker, Paleoflood analysis using slack water deposits, p.733, 1988.

J. Lewin, B. E. Davies, and P. J. Wolfenden, Interaction between channel change and historic 736 mining sediments, River channel changes, pp.353-367, 1977.

J. R. Mchenry and J. C. Ritchie, Cs in arid watersheds, Water Resources Research, vol.282, issue.6, pp.923-927, 1977.
DOI : 10.1029/WR013i006p00923

O. Nuissier, V. Ducrocq, D. Ricard, C. Lebeaupin, and S. Anquetin, A numerical study of three catastrophic precipitating events over southern France. I: Numerical framework and synoptic ingredients, Quarterly Journal of the Royal Meteorological Society, vol.72, issue.630, pp.111-130, 2008.
DOI : 10.1002/qj.200
URL : https://hal.archives-ouvertes.fr/meteo-00260840

R. Nydal and K. Lovseth, Tracing bomb 14C in the atmosphere 1%2-1980, p.743, 1983.

W. W. Oswald, P. M. Anderson, T. A. Brown, L. B. Brubaker, F. S. Hu et al., Effects of sample mass and macrofossil type on radiocarbon dating of arctic and boreal lake sediments, The Holocene, vol.15, issue.5, pp.758-767, 2005.
DOI : 10.1191/0959683605hl849rr

C. J. Popp, J. W. Hawley, D. W. Love, and M. Dehn, Use of radiometric (Cs-137, Pb-210), 748 geomorphic, and stratigraphic techniques to date recent oxbow sediments in the, 1988.

. Drainage, Grants Uranium Region, EnvironmentalGeology and Water Science, vol.750, issue.3, pp.253-269

J. C. Ritchie, J. R. Mchenry, and A. C. Gil, Fallout 137CS in the Soils and Sediments of Three Small Watersheds, Ecology, vol.55, issue.4, pp.887-890, 1974.
DOI : 10.2307/1934426

M. Saarnisto, Time-scales and dating, p.754, 1988.
DOI : 10.1007/978-94-009-3081-0_4

. History, Handbook of vegetation science, pp.77-112

N. A. Sheffer, M. Rico, Y. Enzel, G. Benito, and T. Grodek, The palaeoflood, p.759, 2008.

G. River and F. , A comparison with the extreme 2002 flood event, Geomorphology, vol.98, issue.760, pp.71-83

G. S. Springer, Caves and their Potential Use in Paleoflood Studies, Ancient Floods, Modern Hazards: Principles and 763, 2002.
DOI : 10.1029/WS005p0329

P. Applications and . Hydrology, Water Science and Applications, AGU, pp.329-344

S. Stokes and D. E. Walling, Radiogenic and isotopic methods for the direct dating of fluvial 765 sediments, Tools in Fluvial Geomorphology, p.766, 2003.

M. Stuiver and P. J. Reimer, Extended 14C Data Base and Revised CALIB 3.0 14C Age Calibration Program, Radiocarbon, vol.27, issue.01, pp.215-245, 1993.
DOI : 10.1007/BF02162161

R. A. Sutherland, Quantification of accelerated soil erosion using the environmental tracer 770, 1989.

V. R. Thorndycraft, G. Benito, M. Rico, A. Sopeña, Y. Sánchez-moya et al., A Late Holocene Paleoflood record from slackwater flood, p.773, 2004.

V. Thorndycraft, A. G. Brown, and D. Pirrie, Alluvial records of medieval and prehistoric tin mining on Dartmoor, southwest England, Geoarchaeology, vol.100, issue.3, pp.219-236, 2004.
DOI : 10.1002/gea.10114

N. Tisnérat-laborde, J. J. Poupeau, J. F. Tannau, and M. Paterne, Development of a Semi-Automated System for Routine Preparation of Carbonate Samples, Radiocarbon, vol.31, issue.2A, pp.299-784, 2001.
DOI : 10.1017/S0033822200038145

S. E. Trumbore, Radiocarbon geochronology, Quaternary Geochronology: Methods and Applications. AGU, pp.790-831, 2000.
DOI : 10.1029/RF004p0041

D. E. Walling and Q. He, Use of fallout 137Cs in investigations of overbank sediment deposition on river floodplains, CATENA, vol.29, issue.3-4, pp.263-282, 1997.
DOI : 10.1016/S0341-8162(96)00072-0

R. H. Webb and R. D. Jarrett, One-dimensional estimation techniques for discharges of 794 paleofloods and historical floods, Ancient Floods, Modern Hazards: Principles and Applications of Paleoflood 796, 2002.

. Fig, 1: Topography, hydography, and geological maps of the Gardon river watershed

. Fig, 2: Annual maximum gage height available at Remoulins between 1890 and, 2010.

. Fig, 3: (A) A map showing the study sites in the Gardon Gorges. (B) Terrace (GE) and cave 809 (GG), sites of slackwater flood sediment archives