Simulación numérica del flujo de lahares en el tramo inferior del río Santa Clara (drenaje norte del Volcán Cotopaxi)

Abstract

The current research corresponds to a 3D numeric simulation in large domains of the flow of lahars in the inferior length of the Santa Clara River, which is a part of the population of Sangolquí and is located in the north side of the Cotopaxi Volcano. It has been established an approximate methodology for the simulation, in the software FLOW-3D, of the proposed zone through three probable scenaries of calibration for the volcanic event of 1877, which have been named as A, B, C, respectively. It is considered the implementation of the characteristics of the dilatant fluid for the input of data and approach in the numeric model of the simulation for the mixture water – particles, establishing that the mentioned simulation is done with the intrinsic characteristics of the lahar that are introduced in the Manning coefficient (n) through the absolute roughness (K). This research pretends to identify and validate the scenary of calibration of the event of 1877 with the three-dimensional numeric model in large domains of the inferior length of the Santa Clara River, so that the implementation with conditions of boundaries in the frontier becomes achievable. It is briefly refered, in a general way, the results of the two-dimensional numeric model IBER performed for the same zone.