I Congresso Internacional em Planeamento Sustentável e Ordenamento Territorial: resumos do Congresso

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A Influência do Coeficiente de Rugosidade nos Fenómenos de Cheias – Bacia Hidrográfica da Ribeira de Machico, Ilha da Madeira, Portugal

Acentuados pelas alterações climáticas regionais e globais, os fenómenos das cheias são eventos cada vez mais recorrentes e devastadores. Casos extremos como os que ocorreram em 2010 e 2013 na Ilha da Madeira corroboram com este indicativo, sendo as regiões mais afetadas as que possuíam maior índice urbanístico e maior impermeabilização do solo, como o concelho de Machico. Portanto, com base no histórico recente de cheias no concelho de Machico e o auxílio de ferramentas de georreferenciação como o ArcGIS, procedeu-se à análise geomorfológica e hidrológica da bacia hidrográfica da ribeira de Machico, de forma a verificar o caudal expectável para um período de recorrência de 100 anos, de acordo com a distribuição probabilística de Gumbel. Posteriormente analisou-se a capacidade de escoamento da foz por meio da equação de Manning Strickler, onde será avaliado o coeficiente de rugosidade mínimo necessário para permitir o escoamento do caudal de ponta de cheia expectável. Por fim, os resultados sugerem que a foz não possui a capacidade de escoar o caudal precipitado, necessitando de alterações no coeficiente de rugosidade do leito.Flood phenomena, intensified by regional and global climate change, are increasingly recurrent and devastating events. Extreme cases such as those in 2010 and 2013 on the island of Madeira corroborate this indicator. The regions most affected are those with the highest urban index and the most significant soil waterproofing, such as Machico. Therefore, based on the recent history of floods in the city of Machico and the aid of georeferencing tools such as ArcGIS, the geomorphological and hydrological analysis of the hydrographic basin of the Machico stream was carried out in order to verify the expected flow rate for a recurrence period of 100 years, through the Gumbel Probabilistic Distribution. Subsequently, the river mouth's flow capacity was analyzed using the Manning-Strickler equation, where the minimum roughness coefficient necessary to allow the flow of the expected high peak flow will be evaluated. Finally, the results suggest that the river’s mouth does not have the capacity to drain the precipitated flow, requiring changes in the bed roughness coefficient.info:eu-repo/semantics/publishedVersio

Hidrologia, recursos hídricos e ambiente: aulas teóricas

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Hidráulica: aulas teóricas

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Hidrologia, recursos hídricos e ambiente: aulas práticas

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The Influence of Water Quality on the Structural Development of Vessels: Smart Dimensioning Process

In fact, it is pivotal the development, use, and management of the best and most suitable coatings to be supplied to vessels—especially those designed for long journeys; not only to increase their stability and safety but also to minimize their maintenance cost. In this regard, it should be also considering the function, the vessel typology and its routes, as well as the quality of the waters by which it will navigate. Topics that are critical to promote a better dimensioning process of vessels. Thus, the present chapter, via an extensive literature review articulated with practical approaches, aims to define relevant directions for vessels structural development processes regarding the water quality (sea or river waters), where they will outline their routes. Therefore, the study looks for a relationship between the vessels structural coating design process and the quality of the water where they navigate. Moreover, such a process not only will optimize/minimize the costs with the periodic maintenance of the vessels linings, but also to relate it with its routes—contributing to the revitalization of their structural dimensioning

Hydraulics: practice

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Hydrology, water resources and environment: practice

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Hydrology, water resources and environment: theorical classes

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Hydraulics: theory

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