Análisis comparativo de la simulación numérica tridimensional y unidimensional, del tránsito de lahares primarios en el sector de La Caldera del drenaje norte del volcán Cotopaxi

Abstract

The present titling project aims to analyze the CFD FLOW-3D numerical model and the HEC-RAS software for the simulation of primary lahars flow in “La Caldera” zone. For that, the theoretical basis of the CFD FLOW 3-D and HEC-RAS software will be reviewed. A collection of information such as topography, areas and volumes of the glacier cap, flows and hydrographs, draft of vestiges of the eruptive event of 1877 and values obtained at RunUp stations. Then, the simulation domain will be established, one-dimensional modeling sections and the boundary conditions will be established for the three-dimensional simulation and for each section of the one-dimensional modeling. Subsequently it will proceed to elaborate a plan of runs to carry out the two simulations, whose results will be analyzed according to the draft data estimated in field, originated by the eruptive event of 1877 in the sections of the simulation domain. A comparison of the results obtained from one-dimensional simulation with three-dimensional simulation will be made, and finally, based on the vestiges of the 1877 event, it will be concluded which of the two models is more efficient.