Modelagem matemática de erosão e assoreamento de barragem em bacia hidrográfica semiárida: o caso do Açude Benguê - CE

• Autor(a) principal: Aragão, Jéssica
• Data de Publicação: 2020
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/56784
• topic: Sedimento; USLE (Universal Soil Lost Equation); Açudagem

In the semi-arid region the reservoirs play a key role in mitigating water scarcity, it is of great importance to investigate the processes responsible for their quantitative and qualitative commitment over time. Among many uncertainties and processes that affect the characteristics of a reservoir we can call attention to silting up, which is the object of study of this paper. This essay proposes a method to estimate silting in reservoirs in the semi-arid region, in particular the Benguê reservoir, using topographic, pluviometric, pedological and vegetation cover parameters of the present watershed, components of the Universal Soil Loss Equation, with that generating a model called HIDROSED. This model allows us to estimate the diffuse sediment transport using the methods of Maner, Roehl and Williams & Berndt. Existing data in the literature were used to validate the model. After application of the HIDROSED model, a comparison was made with the values obtained by the model and the actual values already existing for the watershed. The comparison of simulated and measured values showed that the model presented an error of 124%, when using the Maner method. The low applicability of the Roehl and Williams & Berndt equations for the studied basin was implicit, as they had an error of 331% and 353% respectively