Common landslide types in Canada: Submarine landslides

Jacques Locat

In the proceedings of: GeoMontréal 2013: 66th Canadian Geotechnical Conference; 11th joint with IAH-CNC

Session: Posters - Geotechnical

RÉSUMÉ: Un effort cqui suit prédes glisselacune sur 1 INTR Canada isand Pacificto reveal tto the worDepartmenvarious semarine geSansfaçonof submarMulder anbetween mcomprehenthe readerLee (2002Exploitcommunicprotection,infrastructuan improvparticular consequenSubmaaquatic enfjords (Prioal. 2005), 2008, Loca2003). ThNewfoundet al. 1999had an vohistorical (Mosher aThe inincreasingMcCall 20simple circRiver (FigMON LANARINE LALocat ire d™études sé Laval, Québlocat@ggl.ulaCT f a Canadian ee landslides in e mass movemechnical investicanadien a été ésente une génements sous-mrtout en ce qui RODUCTION s surrounded c. Still, the marthe various mark of the Geolont of fisherieseafloor mappieoscience invesn, 2000). The mrine mass movnd Cochonat (mass slides ansive reviews r is referred to, 2009), Massotation of offshcation and tra, and the proteures, have conved understanseafloor mnces (Nadim anarine mass mnvironment incluor et al. 1982, estuaries (Syvat et al. 2012) he well knownland (Heezen 9) which generolume of abouknown submand Piper 2009)nventory of s as more of th03). They are cular failure, likure 3) to the GDSLIDE TANDSLIDsur les risquesbec, Québec,aval.ca effort into prodCanada illustents has largeigations and hamis en place anérale de la divmarins s™est acca trait à la caraby three ocearine environmeass movement ogical survey o and Ocean ng program sstigations (Priomost commonlyvements is the1996) which mnd gravity flowon submarine o the following on et al. (2006)hore resourcesansport corridoection of coastantributed to a ding of offshomass movemnd Locat 2005)movements areuding lakes (DSyvitski et al. vitski et al. 199and the oceann 1927 (Granand Ewing 19rated a tsunamt 150 km3, maarine mass m). submarine mahe seafloor is mfound at varioke along parts oGrand banks sTYPES INDES s naturels (LE Canada ducing guidelintrating its dively increase oveazard assessmafin de prépareversité et de lacrue sensiblemactérisation géoans: Atlantic, Aent is just beginsignatures, thof Canada andwho have initstrongly suppoor 1993; Locaty used classifice one proposemakes a distinws (Figure 1).mass movempapers: Locat), Lee et al. (20s, developmenors, fishing haal communitiesgrowing intereore geohazardments and ). e found in vaoughty et al. 201999, Levesqu92, Campbell e (Piper and Md Banks slide56, Figure 2, Pmi killing 29 peaking it the laovement on Eass movementmap (e.g. Piperous size, from of the St. Lawrslide shown beN CANADERN), Départees for the studrsity and also er the last 20 yment. er un guide poa complexité dement au cours otechnique ainArctic nning hanks d the tiated orting t and cation ed by nction . For ents, t and 007). nt of abitat s and est in ds, in their arious 010), ue et et al. cCall e off Piper eople, rgest Earth ts is r and more rence efore (Figushorecomptriggeagainslide DeltaVancsubm(Mos . Figurtypes AslidessubmactiondissoDA: ement de géody of landslidecomplexity. Oyears but there ur l™étude des es glissements des vingt dernsi qu™à l™évaluare 2). The Bete of the St. Lplex slide Cauered by a largen in 1663. Anois shown in Fia in the Beaufocouver Island marine slides aher et al. 2004re 1 Summarys (modified afteAll causes or trigs, are also appmarine slides inn and tidal variociation of gaz ologie et de ges, this paper pOur actual knoare still some glissements. Dsous-marins. nières annéesation du dangertsiamites slide Lawrence estuauchon-Voyer e earthquake abother example gure 5 for a sitort Sea (MosheEearthquake long the coast, Figure 6). y classification er Mulder and Cggering mechaplicable to submn addition to siations (Atigh ahydrates (Grozgénie géologiqpresents an ovwledge of thelimitation with Dans ce contexBien que la ca, il y a encorer. (Figure 4), onary is also deet al. 2011) wbout 7250 yearof a major retrte just off the Mer et al. 2011). has also triggt of the Strait oof submarineCochonat 1996anisms valid formarine mass mspecific cause and Byrne 2005zic 2010). It is ique, verview of extent of regards to xte l™article rtographie e plusieurs n the north epicted as was likely rs ago and rogressive Mackenzie The 1946 gered few of Georgia e landslide 6). r subaerial movements like wave 5) and the interesting

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