Centre de documentation
scientifique

GIS-based calibration of MassMov2D / Monia Elisa Molinari in Transactions in GIS, vol 16 n° 2 (April 2012)  

Public [article]  inTransactions in GIS > vol 16 n° 2 (April 2012) . - pp 215 - 231 Titre : GIS-based calibration of MassMov2D Type de document : Article/Communication Auteurs : Monia Elisa Molinari, Auteur ; M. Cannata, Auteur ; S. Begueria, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 215 - 231 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] analyse de sensibilité [Termes IGN] effondrement de terrain [Termes IGN] étalonnage [Termes IGN] modèle numérique [Termes IGN] risque naturel [Termes IGN] simulation numérique [Termes IGN] Suisse Résumé : (Auteur) MassMov2D is a numerical model for simulating runout and deposition of landslide phenomena over a complex topography that is implemented in the free GIS PCRaster. This research aims at improving the mechanism of MassMov2D calibration and verifying its capability of representing complex landslides. In this article the authors present the enhancement of the MassMov2D code due to the introduction of the Nash-Sutcliffe coefficient for model efficiency calculation; this enables the replacement of the inefficient ‘trial and error’ approach used for sensitivity analysis and calibration with a semi-automatic procedure. During this research the improved code was tested in a case study located on the Canaria Valley (Switzerland) where a complex landslide occurred. An optimal set of parameters were calculated for evaluating the effects of a possible further slope failure. The availability of a unique dataset of high resolution digital elevation models just before and after the collapse allowed precise evaluation of the sensitivity and calibration of the model with the new procedure. The results demonstrate that this model is capable of reproducing the observed deposits even though some model limitations were identified in steep slope areas. Finally the study presents the expected scenario due to a future landslide. Numéro de notice : A2012-161 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2012.01316.x Date de publication en ligne : 13/04/2012 En ligne : https://doi.org/10.1111/j.1467-9671.2012.01316.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31608 [article]

Modeling of landslide-generated tsunamis with GRASS / M. Cannata in Transactions in GIS, vol 16 n° 2 (April 2012)  

Public [article]  inTransactions in GIS > vol 16 n° 2 (April 2012) . - pp 191 - 214 Titre : Modeling of landslide-generated tsunamis with GRASS Type de document : Article/Communication Auteurs : M. Cannata, Auteur ; R. Marzocchi, Auteur ; Monia Elisa Molinari, Auteur Année de publication : 2012 Article en page(s) : pp 191 - 214 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] effondrement de terrain [Termes IGN] GRASS [Termes IGN] Italie [Termes IGN] lac [Termes IGN] risque naturel [Termes IGN] simulation [Termes IGN] tsunami Résumé : (Auteur) The following research aims to enhance and spread the capacity of assessing risk due to landslide-generated tsunamis by fostering the use of a GIS (Geographic Information System), and in this particular instance, an Open Source GIS (where “Open Source” can be loosely defined as freely available source code). For this purpose, we tested a procedure to be spatially implemented in the Open Source GRASS GIS through developing a module named r.impact.tsunami that simulates landslide-generated tsunami. In this article we present its application in a case study performed on Como Lake (Lago di Como) in northern Italy. The review of the results identified sources of uncertainties while the model sensitivity outlined the influence of the parameters governing the model. Moreover, in order to verify the model validity, we implemented a new module (r.swe), that simulates the tsunami propagation and run-up with the shallow water equations, and compared the results. Notwithstanding non-negligible differences, the two models produced results of the same magnitude; this confirmed the validity of both models, although a rigorous validation of the models could not be performed due to the lack of observed data. Numéro de notice : A2012-160 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2012.01315.x Date de publication en ligne : 13/04/2012 En ligne : https://doi.org/10.1111/j.1467-9671.2012.01315.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31607 [article]