Modelo de flujos secundarios de lodo en las quebradas Seca y Las Flores, volcán Imbabura-ciudad de Ibarra

Abstract

The mud flows that cross the streams of the Imbabura volcano and reach the city of Ibarra are generated mainly by the occurrence of heavy rainstorms and leave in their path, damages to the infrastructure and the quality of life of the inhabitants. As a preventive tool, models of secondary mudflows have been generated, with the LaharZ program, that descend through the Seca and Las Flores streams, with the objective of knowing their area of influence. The volume of fall deposits was calculated through fieldwork and using orthophotos that were taken with drone and processed with the PIX4D program. Hydrological analysis was carried out to calculate the volume of water with the HEC-HMS program, which allows modeling the behavior of watersheds based on parameters chosen by the user. The generated models were compared with the flood event that occurred in April 2011, to propose a return period of a rainfall that could generate a mudflow with similar characteristics. It was concluded that LaharZ is not the appropriate program for the modeling of mudflows when certain parameters are used and it will be necessary to use another program in future projects.