Avaliação do período de aquecimento, calibração e validação do modelo SWAT na bacia hidrográfica do Arroio Taboão (RS)

• Autor(a) principal: Guidolin, Thawara Giovanna Souza da Fonseca
• Data de Publicação: 2019
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/236289
• topic: Modelos hidrológicos; Hidrossedimentologia; Taboão, Arroio (RS); Hydrosedimentological modeling; Warm-up; SWAT model

Over the years, the human action on the environment has been modifying many natural processes, especially that involve soil deterioration by erosion. Hydrosedimentological modeling presents as a tool to evaluate not only soil loss as also sediment yield in watersheds. However, the historical flow series and mainly sediments are extremely reduced, which indicates the importance to use all periods with available data in the essential stages of simulation – calibration of model parameters and verification of simulated results in relation to observed data. Thus, the purpose of this work was to evaluate the warm-up influence over calibration and validation steps of the SWAT model on the Taboao basin. Satisfactory results were obtained in both stages, for the hydrological and sedimentological simulation, considering Nash-Sutcliffe and percent bias performance coefficient. In the warm-up period analysis, there was an increase in performance metrics for the validation step of the hydrological model, for both simulated scenarios (with 1-year warm-up and without warm-up model) in relation to the comparative scenario, with 2 years warm-up. The best hydrological simulation performance was observed on the validation step for 1-year warm-up scenario, result in NSE of 0.70 and PBIAS of 0.68%, considering a monthly time step.