Mapas de peligro por inundación del río Chibunga en el tramo de influencia al Parque Lineal ubicado en la ciudad de Riobamba: modelación hidrodinámica bidimensional del río Chibunga, en el tramo de influencia al parque lineal ubicado en la ciudad de Riobamba.

Abstract

The analysis section is centered on the Chibunga River, which crosses the city of Riobamba from northwest to southeast. Along the stretch there are special occupancy structures such as educational centers, animal rescue centers, agricultural and livestock areas, as well as family dwellings. Therefore, a two-dimensional hydrodynamic modeling of the Chibunga River was performed to identify areas susceptible to river flooding. IBER is selected as the computational tool for the modeling, followed by the collection and validation of the base information, such as hydrological data and digital terrain model. The modeling is realized in three phases: Preprocessing, where the non-permanent flow hydrographs are introduced and Manning's n coefficients, estimated from a previous analysis, are assigned. In addition, the assignment of the model mesh, for which a respective analysis is performed to select the appropriate mesh size. Solver, where the temporal parameters are incorporated and the simulation is running. Finally, post-processing, where the results, depth and velocity maps related to return periods between 5 and 100 years are observed. Finally, an analysis of the draft and velocity maps is performed, and control points and sections are placed in the areas where the exposed structures are located, in order to study the maximum values of velocity and depth. Additionally, the areas covered by the flooding area are identified.