Name: Lizandra Broseghini Föeger
Type: MSc dissertation
Publication date: 30/10/2019
Advisor:
Name |
Role |
|---|---|
| Diogo Costa Buarque | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| Diogo Costa Buarque | Advisor * |
| Fernando Mainardi Fan | External Examiner * |
| José Antônio Tosta dos Reis | Internal Examiner * |
Summary: Soil erosion is a complex environmental problem, responsible for soil modification and
sediment transfer from its origin site. Technological progress has allowed the
developing of computational models to help the understanding of these processes. In
large scales, it is usual to use conceptual and distributed models that integrate a
hydrological module in its structure also connected with a GIS environment. The MGBSED is a hydrossedimentological model coupled with the MGB model, developed to
estimate the generation, transport and redistribution of sediments in large watersheds.
The model has already been applied to the Madeira River basin, at the entire Amazon
basin and at the Doce river basin. However, the use of the hydrodynamic flood routing
model is only available for the Amazon basin. The aim of this study was to perform the
coupling of the MGB-SED model to the latest version of the MGB model, which uses
the inertial flood routing method, and to apply the model to the Madeira River basin for
comparison with the results of the hydrodynamic model. The evaluated sediment
characteristics was the erosion in river stretches, estimated annual suspended
sediment load, suspended sediment transport and seasonal variability of suspended
sediment. The coupling of MGB-SED generated reasonable results, similar with the
simulation that uses the hydrodynamic flood routing, reaffirming the hydrological and
sedimentological behavior in the Madeira River basin previously estimated with the
hydrodynamic MGB version. For most stations, both fluviometrics and
sedimentometrics, the statistical values calculated to evaluate the simulation
performance with the inertial model and the hydrodynamic model were very similar.
The easier preparation of data for the inertial model, as well as its computational
simplicity, when compared to the hydrodynamic model, can be considered advantages
of the new coupled model, which also made the model applicable to any basin, without
losses to the representation of local hydrosedimentological dynamics.
Keywords: Hydrosedimentological modeling. Inertial flood routing. Large basin
modeling
