Numerical modelling of the flow rate in artificial water channels: application to Ribeira Brava´s stream

• Autor(a) principal: Lousada, Sérgio António Neves
• Data de Publicação: 2020
• Outros Autores: Moura, André Diogo Sousa, Gonçalves, Leonardo Bazilio
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.13/3751
• topic: Artificial water channel; Urban floods; Experimental model; Empirical methods; Geographic Information Systems; Canal de água artificial; Cheias urbanas; Modelo experimental; Modelos matemáticos; Sistemas de Informação Geográfica; Ribeira Brava, Madeira (Portugal); .; Faculdade de Ciências Exatas e da Engenharia

Water flows that run through urban areas are mostly heterogeneous, thus their characterization must include a formulation that explicitly incorporates spatial variability. The University of Madeira´s Hydraulics Laboratory, Geographic Information Systems and software such as HEC-RAS complemented by spreadsheets constitute viable alternatives for studying the occurrence of floods in river basins. The purposes of this study are the characterization and development of numerical tools accessing streamflow in artificial water channels, in case of a sudden variation of the tributary flows; application of a hydrodynamic scale model, considering the variable run-off in urban floods, with changes between the variable inflow conditions and the channel´s hydro-morphological conditions; or even the feasibility of the hydrodynamic scale model and its utility to develop flood mitigation measures. The combined use of all three models (i.e. empirical method, experimental model and HEC RAS) towards runoff simulation and modelling, reveals itself to be the most appropriate way to prevent urban floods and to develop flood mitigation measures, removing gaps in each of the models used.