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Secondary lahar hazard assessment for Villa la Angostura, Argentina, using Two-Phase-Titan modelling code during 2011 Cordón Caulle eruption

Córdoba, Gustavo Y Villarosa, G Y Sheridan, Michael Y Viramonte, J. G Y Beigt, D Y Salmuni, G (2014) Secondary lahar hazard assessment for Villa la Angostura, Argentina, using Two-Phase-Titan modelling code during 2011 Cordón Caulle eruption. Natural Hazards and Earth System Sciences (NHESS), 2. ISSN 1561-8633

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Resumen

This paper shows the results of secondary lahar modelling in Villa La Angostura town (Neuquén-Argentina) based on the Two-Phase-Titan modelling computer code, which aimed to provide decision makers a useful tool to assess lahar hazard during the 2011 Puyehue-Cordón Caulle Volcanic Complex eruption. Possible occurrence of secondary lahars that could reach the city was analized. The performance of the Two-Phase-Titan model using 15 m resolution DEMs developed from optical satellite images and from radar satellite images was evaluated. The output of these modellings showed inconsis- tencies that, based on field observations, were attributed to bad adjustment of DEMs to real topography. Further testing of results using more accurate radar based 10 m DEM, proved more realistic predictions. The procedure allowed to simulate the path of flows from Florencia, Las Piedritas and Colorado creeks, which are the most influenc- ing streams in Villa La Angostura. The output of the modelling is a valuable tool for city planning and risk management especially considering the glacial geomorphology features of the region, the strong urban development growth and the land occupation tendencies observed in last decade in Villa La Angostura and its surroundings.

Tipo de Elemento: Artículo
Asunto: Q Ciencias > QE Geology
T Tecnología > TA Engineering (General). Civil engineering (General)
Division: Facultad de Ingeniería > Programa de Ingeniería Civil > Productividad
Depósito de Usuario: Dr Gustavo Cordoba
Fecha Deposito: 22 Jul 2019 13:52
Ultima Modificación: 22 Jul 2019 13:52
URI: http://sired.udenar.edu.co/id/eprint/6079

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