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Publication
Hydraulic Planning in Insular Urban Territories: The Case of Madeira Island—São João Stream, Funchal, Portugal
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Advisor(s)
Abstract(s)
his study’s primary goal was to conduct an analysis regarding the flood susceptibility
of the main watercourse of the São João (Funchal) drainage basin. In addition, if proven necessary,
we also aimed to suggest mitigation measures, such as sizing a detention basin and promoting
adjustments of the riverbed’s roughness coefficient. This study also resorted to geomorphological
data—obtained during the watershed characterization process—that were then utilized in the SIG
ArcGIS software, in order to estimate the expected peak flow rate, considering a return period of
100 years using the Gumbel distribution. Finally, the Manning–Strickler equation was utilized to
determine the river discharge point’s drainage capacity; the reason for that was to verify whether its
drainage capacity was sufficient to drain the entire volume of rainwater associated with an extreme
flood event. In summary, the results obtained by this study indicate that the drainage capacity of
the river discharge point of the São João watershed (Funchal) is insufficient when considering an
extreme flood event, for a return period of 100 years. Hence, it became necessary to explore the two
aforementioned mitigation measures: first, regarding the detention basin, its sizing was calculated
through both the Dutch method and the simplified triangular hydrograph method; second, aiming
to increase the drainage capacity of the river discharge point, it is suggested that the roughness
coefficient should also be modified.
Description
Keywords
Hydraulics Hydrology Insular territories Spatial analysis Territorial management Urban planning Funchal, Madeira (Portugal) . Faculdade de Ciências Exatas e da Engenharia
Citation
Lousada, S.; Alves, R.; Fernandes, M.; Gonçalves, L. Hydraulic Planning in Insular Urban Territories: The Case of Madeira Island—São João Stream, Funchal, Portugal. Water 2023, 15, 2075. https://doi.org/10.3390/w15112075
Publisher
MDPI