Author
Jacques Locat
Bio: Jacques Locat is an academic researcher from Laval University. The author has contributed to research in topics: Submarine landslide & Slope stability. The author has an hindex of 7, co-authored 8 publications receiving 752 citations.
Papers
More filters
TL;DR: Due to the recent development of well-integrated surveying techniques of the sea floor, significant improvements were achieved in mapping and describing the morphology and architecture of submarine seafloor as discussed by the authors.
Abstract: Due to the recent development of well-integrated surveying techniques of the sea floor, significant improvements were achieved in mapping and describing the morphology and architecture of submarine...
664 citations
TL;DR: In this paper, backscatter strength measurements made with a Simrad EM1000 multibeam echosounder in 1993, 1997 and 1999 have shown spatial and temporal variations, which are interpreted in relation to the occurrence of the Saguenay Fjord flood.
52 citations
TL;DR: In this article, the permanent ground deformations induced by different earthquake scenarios from which shallow sediment landslides could be triggered are characterized, based on slope gradients obtained from EM1000 multibeam bathymetry data as well as water content and undrained shear strength measurements made in box and gravity cores.
38 citations
TL;DR: Following the flood of July 1996, a significant quantity of sediment, coming from the catchment areas contiguous to the Saguenay fjord, was discharged in the Baie des Ha! Ha! and the North Arm as mentioned in this paper.
Abstract: Following the flood of July 1996, a significant quantity of sediment, coming from the catchment areas contiguous to the Saguenay fjord, was discharged in the Baie des Ha! Ha! and the North Arm. To ...
35 citations
01 Jan 2000
TL;DR: Since the early 1990's, the development of multibeam surveys has provided a very new and precise way of describing the morphology and nature of the underwater world as discussed by the authors, and these surveys are now an integral part of any underwater study either in marine, estuarine, fluvial or lacustrine environments.
Abstract: Since the early 1990's, the development of multibeam surveys has provided a very new and precise way of describing the morphology and nature of the underwater world ! We must consider that these surveys are now an integral part of any underwater study either in marine, estuarine, fluvial or lacustrine environments This presentation will elude not only on establishing the major role which can be played by multibeam surveys in geosciences studies but will also elaborate on the necessity to acquire a systematic multibeam-quality map of the underwater of Canada in a manner similar to what is provided by aerial photography Resume: Depuis le debut des annees 1990, les leves multi-faisceaux nous ont permis d'obtenir des images precises des fonds marins ce qui nous a permis d'ameliorer grandement notre capacite a bien definir la geomorphologie sous- marine Ces leves nous fournissent aujourd'hui, tant dans les environnements marins, lacustres que fluviaux, une qualite d'imagerie equivalente a celle que l'on peut obtenir sur terre a partir de photographies aeriennes Une illustration faite a partir de plusieurs exemples pris un peu partout dans le monde vient illustrer le potentiel enorme de cet outil pour les geosciences De plus, on espere, par cette demonstration, initier une concertation pan- canadienne qui nous permettra d'acquerir une connaissance inegalee du patrimoine sub-aquatique canadien
14 citations
Cited by
More filters
TL;DR: The modified Varnes classification of landslides has 32 landslide types, each of which is backed by a formal definition as mentioned in this paper, and complex landslides are not included as a separate category type, but composite types can be constructed by the user of the classification by combining two or more type names.
Abstract: The goal of this article is to revise several aspects of the well-known classification of landslides, developed by Varnes (1978). The primary recommendation is to modify the definition of landslide-forming materials, to provide compatibility with accepted geotechnical and geological terminology of rocks and soils. Other, less important modifications of the classification system are suggested, resulting from recent developments of the landslide science. The modified Varnes classification of landslides has 32 landslide types, each of which is backed by a formal definition. The definitions should facilitate backward compatibility of the system as well as possible translation to other languages. Complex landslides are not included as a separate category type, but composite types can be constructed by the user of the classification by combining two or more type names, if advantageous.
1,973 citations
TL;DR: In this article, the authors outline the principles for landslide mapping, and review the conventional methods for the preparation of landslide maps, including geomorphological, event, seasonal, and multi-temporal inventories.
1,290 citations
TL;DR: In this paper, a critical review of statistical methods for landslide susceptibility modelling and associated terrain zonations is presented, revealing a significant heterogeneity of thematic data types and scales, modelling approaches, and model evaluation criteria.
957 citations
TL;DR: Due to the recent development of well-integrated surveying techniques of the sea floor, significant improvements were achieved in mapping and describing the morphology and architecture of submarine seafloor as discussed by the authors.
Abstract: Due to the recent development of well-integrated surveying techniques of the sea floor, significant improvements were achieved in mapping and describing the morphology and architecture of submarine...
664 citations
Journal Article•
TL;DR: More than 100 offshore mass-movement deposits have been studied in Holocene and Pleistocene sediments, and the processes can be divided into three main types: slides/slumps, plastic flows, and turbidity currents, of which 13 main varieties have been recognized as mentioned in this paper.
Abstract: More than 100 offshore mass-movement deposits have been studied in Holocene and Pleistocene sediments. The processes can be divided into three main types: slides/slumps, plastic flows, and turbidity currents, of which 13 main varieties have been recognized. The three types are differentiated mainly by motion, architecture, and shape of failure surface. For slides, the morphology of deposits can usually be linked to a process, but for plastic flows and turbidity currents, information about the motion is mainly provided by the sedimentary record. A static classification based on these features is given, and is related to a dynamic classification system to try to underline the morphological transformation of an offshore event from initiation to deposition.
440 citations