Hydraulic Planning in Insular Urban Territories: The Case of Madeira Island—Ribeira Brava

Water

José Manuel Naranjo Gómez¹  Sérgio Lousada²  Rui Alexandre Castanho³  José Cabezas⁴ 

[1] CITUR-Madeira-Research Centre for Tourism Development and Innovation, 9000-082 Funchal, Portugal;Department of Civil Engineering and Geology (DECG), Faculty of Exact Sciences and Engineering (FCEE), University of Madeira (UMa), 9000-082 Funchal, Portugal;Faculty of Applied Sciences, WSB University, 41-300 Dąbrowa Górnicza, Poland;VALORIZA-Research Centre for Endogenous Resource Valorization, Polytechnic Institute of Portalegre (IPP), 7300 Portalegre, Portugal;

关键词: hydraulics;    hydrology;    insular territories;    spatial analysis;    territorial management;    urban planning;   

DOI  :  10.3390/w13212951

来源: DOAJ

【 摘 要 】

The main objective of this study was to analyze the flood propensity of the main watercourse 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.

【 授权许可】

Unknown