Artigos de Revista

A  gua residual tratada ‚ uma fonte de  gua alternativa e a sua utiliza‡Æo contribui para a mitiga‡Æo da escassez de  gua, atrav‚s da aplica‡Æo da  gua para reutiliza‡Æo (ApR) em usos compat¡veis, como rega de espa‡os verdes e lavagem de ruas. A modela‡Æo do decaimento de cloro em Sistemas de Distribui‡Æo de ApR (SDApR), englobando o decaimento de cloro no seio da  gua e o decaimento de parede, carece de estudos que proponham metodologias de implementa‡Æo, bem como de trabalho experimental (laboratorial (e.g. testes de decaimento de cloro em ApR) e … escala real). Este artigo apresenta uma metodologia para modela‡Æo do decaimento de cloro em SDApR, tendo em conta a modela‡Æo hidr ulica, o decaimento no seio da  gua e o decaimento devido … parede, que pretende servir de ferramenta de apoio … identifica‡Æo das gamas de desinfetante a aplicar e a manter nas redes, contribuindo para promover uma adequada gestÆo e manuten‡Æo da desinfe‡Æo. As condi‡äes de opera‡Æo do sistema, as caracter¡sticas de qualidade da ApR e os requisitos de residual de cloro a manter na rede sÆo condicionantes a considerar na modela‡Æo de um SDApR. Dados os n¡veis de am¢nia dos efluentes tratados em Portugal, deve ser dada especial aten‡Æo … sele‡Æo do desinfetante, propondo-se um residual de monocloramina.

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Extending for more 900 km with diverse geomorphologies and land-use occupation, the Portuguese coastal zone is highly vulnerable to overtopping and flooding.

Water losses from water distribution means have a high environmental impact in terms of natural resource depletion (water, energy, ecosystems). This work aims to develop an optical airborne surveillance service for the detection of water leaks (WADI—Water-tightness Airborne Detection Implementation) to provide water utilities with adequate and timely information on leaks in water transportation mains outside urban areas. Firstly, a series of measurement campaigns were performed with two hyperspectral cameras and a thermal infrared camera in order to select the most appropriate wavelengths and combinations thereof for best revealing high moisture areas, which are taken as a proxy for water leakage. The Temperature-Vegetation-Index method (T-VI, also known as Triangle/Trapezoid method) was found to provide the highest contrast- to-noise ratio. This preliminary work helped select the most appropriate onboard instrumentation for two types of aerial platforms, manned (MAV) and unmanned (UAV). Afterwards, a series of measurement campaigns were performed from 2017 to 2019 in an operational environment over two water distribution networks in France and Portugal. Artificial leaks were introduced and both remote sensing platforms successfully detected them when excluding the unfavorable situations of a recent rain event or high vegetation presence. With the most recent equipment configuration, known and unknown real leaks in the overflown part of a water transportation network in Portugal have been detected. A significant number of false alarms were also observed which were due either to natural water flows (groundwater exfiltration, irrigation runoff and ponds) or to vegetation-cover variability nearby water-distribution nodes. Close interaction with the water utilities, and ancillary information like topographic factors (e.g., slope orientation), are expected to reduce the false alarm rates and improve WADI’s methodology performance.

Assessing the Nature-Based Solutions (NBS) contribution to urban resilience, along with developing tools capable of demonstrating their long-term value, comprises a most needed step forward. Nevertheless, the NBS contribution to urban resilience has been yet slightly explored. Given the urban resilience complexity and multiple NBS capabilities, specific needs for a robust assessment should be investigated. This paper identifies the requirements for a comprehensive assessment of the NBS contribution to urban resilience and analyses the main assessment frameworks focused on resilience and NBS for urban drainage. First, the evolution of the resilience concept and relevant resilience assessment frameworks (RAF) are presented. Secondly, NBS challenges to enhance resilience and NBS assessment proposals are analysed. Thirdly, the attributes for assessing urban resilience and aspects to assess the NBS contribution are analysed. To conclude, a critical analysis of the assessment approaches is presented. Important challenges across the RAF have been identified, especially regarding their feasibility of application. Based on the performed analysis, most RAFs are not feasible for city benchmarking and assessing the resilience evolution over time, neither for assessing comprehensively the NBS contribution. Regarding specifically the NBS assessment proposals, just one focused on urban resilience was developed to date, which allows evaluating their contribution over time, between cities, or between different NBS.

Within the BlueSafePort project an Early Warning System (EWS) is being developed for forecasting and alerting emergency situations related to ship navigation in ports, as well as operational constraints. Port terminals downtime leads to large economic losses and largely affects the port

Early Warning Systems are crucial disaster-risk-reduction strategies as they allow local authorities to prepare and implement in advance the necessary measures to avoid major destruction and risk for individuals and properties caused by storm events. HIDRALERTA is a forecast, early warning and risk assessment system for port and coastal areas that usesforecasts of sea-waves and water levels to evaluate overtopping/flooding events and risks associated with mooring of ships.

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