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Publication
Hydraulic planning in insular urban territories: the case of Madeira Island—Ribeira Brava
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Advisor(s)
Abstract(s)
The main objective of this study was to analyze the flood propensity of the main water course of Ribeira Brava drainage basin and, if necessary, to suggest two methodologies to mitigate
the impacts, i.e., detention basin sizing and riverbed roughness coefficient adjustment. For the
flood propensity assessment, geomorphological data obtained from the watershed characterization
process was used through the SIG ArcGIS software and then used for the calculation of the expected
peak flow rate for a return period of 100 years using the Gumbel Distribution. Finally, the drainage
capacity of the river mouth was verified via the Manning-Strickler equation, with the purpose of
establishing whether the river mouth of the watershed has the capacity to drain the entire volume
of rainwater in an extreme flood event. In summary, the results indicate that the river mouth of the
Ribeira Brava watershed does not have the capacity to drain the rain flow for the pre-established
return period; therefore, the detention basin was sized using the Dutch Method and the Simplified
Triangular Hydrograph Method, and the roughness coefficient was adjusted in order to ensure the
increase in the river mouth’s drainage capacity.
Description
Keywords
Hydraulics Hydrology Insular territories Spatial analysis Territorial management Urban planning Ribeira Brava, Madeira (Portugal) . Faculdade de Ciências Exatas e da Engenharia
Citation
Lousada, S.; Cabezas, J.; Castanho, R.A.; Gómez, J.M.N. Hydraulic planning in insular urban territories: The case of Madeira Island—Ribeira Brava. Water 2021, 13, 2951. https://doi.org/10.3390/w13212951
Publisher
MDPI