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  • An information systems for infrastructure asset management tailored to portuguese water utilities: platform conceptualization and a prototype demonstration
    Publication . Carriço, Nelson; Ferreira, Bruno; Antunes, André; Grueau, Cédric; Barreira, Raquel; Mendes, Ana; Covas, Dídia; Monteiro, Laura; Santos, João; Brito, Isabel S.
    This paper presents a new information technology platform specially tailored for infrastructure asset management of urban water systems operated by water utilities of lower digital maturity level, developed in the scope of DECIdE research project. This platform aims at the integration of different data from the water utilities with several information systems and the assessment of the system performance, in terms of water losses, energy efficiency and quality of service by using developed tools (i.e., water and energy balances and key performance indicators). This platform was tested with data from five small to medium size Portuguese water utilities with different maturity levels in terms of technological and human resources. Obtained results are very promising since the platform allows to assess the systems performance periodically which constitute an important part of the infrastructure asset management for small and medium-sized water utilities
    2022Preprint Open access Show more
  • Análise crítica ao método P-δ simplificado proposto pelo MC90
    Publication . Vinagre, João
    Neste artigo procede-se à análise e discussão do método simplificado de avaliação dos efeitos de 2ª ordem em elementos comprimidos inseridos em estruturas de edifícios correntes, preconizado pelo Model Code 90 CEB-FIP.
    2004-07Journal article Open access Show more
  • Application of fuzzy inference system for determining weathering degree of some monument stones in Iran
    Publication . Heidari, Mojtaba; Chastre, Carlos; Torabi-Kaveh, Mehdi; Ludovico-Marques, Marco; Mohseni, Hassan
    2017Journal article Open access Show more
  • Computational Tools for Supporting the Operation and Management of Water Distribution Systems towards Digital Transformation
    Publication . Carriço, Nelson; Ferreira, Bruno; Antunes, André; Caetano, João; Covas, Dídia
    This paper presents a set of computational tools specially developed for supporting the operation and management of water distribution systems towards digital transformation of water services. These tools were developed in the scope of two R&D projects carried out in Portugal, DECIdE and WISDom, during 2018–2022. The DECIdE project focused on the development of tools for importing cadastral and operational data, as well as on the three operational tools for supporting the performance assessment: the first allows the calculation of different key performance indicators, both at a global and sectorial level, which is an annual requirement of the water regulator, and the other two allow the calculation of the water and the energy balances and a set of complementary indices. The WISDom project aimed at the implementation of applications that directly address specific water utility needs, namely, the flow rate data processing, the optimal location of pressure sensors, the identification of critical areas in the distribution network for pipe burst location, and the prioritization of pipes for rehabilitation. Implemented tools are useful to support water utilities in the daily operation and management of their systems, being a step forward towards digital transformation of the water sector.
    2023Journal article Open access Show more
  • Data and information systems management for the urban water infrastructure condition assessment
    Publication . Carriço, Nelson; Ferreira, Bruno
    Most of urban water infrastructure around the world were built several decades ago and nowadays they are deteriorated. So, the assets that constitute these infrastructures need to be rehabilitated. Since most of the assets are buried, water utilities face the challenge of deciding how, where and when to rehabilitate. Condition assessment is a vital component on plan rehabilitation actions and is mostly based on the data collected from the managed networks. This collected data need to be put together in order to be transformed into useful information. Nonetheless, the large amount of assets and data involved makes data and information management a challenging task for water utilities, especially in those with as lower digital maturity level. This paper highlights the importance of data and information systems’ management for urban water infrastructure condition assessment based on the authors’ experience.
    2021Journal article Open access Show more
  • Desenvolvimento e validação de aplicação computacional para avaliar sistemas de rega sob pressão
    Publication . Luz, Paulo Brito da; Felicíssimo, D; Carriço, Nelson; Antunes, André
    O setor do regadio requer práticas com sustentabilidade ambiental e competitividade socioeconómica, que envolvem o incremento do uso eficiente da água, em diferentes escalas e redes de distribuição. Muitas abordagens inovadoras para apoiar essas práticas, nomeadamente as que se relacionam com as tecnologias de informação e comunicação (TIC), são presentemente inseridas e divulgadas na designada “Agricultura 4.0”. Neste sentido, ao nível da rede terciária, as TIC têm melhorado a capacidade de se transferir e utilizar informação, facilitando ao regante a abordagem de diferentes processos relativos às instalações de rega, desde a fase de compra até avaliações de desempenho, entre outros. Na generalidade dos projetos hidroagrícolas em Portugal, a opção dos regantes por métodos sob pressão (i.e. rega por aspersão e localizada) tem crescido face a vantagens de automatização, economia de mão-de-obra e de maior eficiência no uso da água. Contudo, continuam a observar- se situações de risco na gestão dos recursos naturais e energéticos, pela falta de adequação do sistema de rega às condições pedo-climáticas específicas das parcelas. Consequentemente, um sistema de rega sob pressão pode atingir níveis de classificação de desempenho muito baixos, considerando as perdas de água excessivas, relacionadas com os escoamentos (superficiais e/ou subterrâneos), a evaporação e os desvios causados pelo vento. Estas perdas podem ser calculadas pela Eficiência de Aplicação, que é definida pela razão entre o volume médio de água disponível para as plantas e o volume médio aplicado na rega. Este indicador depende de determinadas variáveis com impacto mais significativo que se relacionam com: 1) tipo e características da rega: dotação, taxa de aplicação; 2) características do terreno: textura do solo, declive e coberto vegetal; e 3) fatores climáticos: velocidade do vento e temperatura. O presente artigo tem como objetivo a apresentação de uma aplicação computacional desenvolvida e validada para o cálculo da eficiência de aplicação de água de sistemas de rega sob pressão, ao nível da rede terciária (parcela). Esta ferramenta de AgriTech processa classificações e padrões devidamente enquadrados em informação e recomendações de normalização atualizada, capacitando o utilizador para fazer as opções mais válidas com base em critérios objetivos de boas práticas.
    2021Journal article Open access Show more
  • Determination of weathering degree of the Persepolis stone under laboratory and natural conditions using fuzzy inference system
    Publication . Heidari, Mojtaba; Torabi-Kaveh, Mehdi; Chastre, Carlos; Ludovico-Marques, Marco; Mohseni, Hassan; Akefi, Hossein
    2017Journal article Open access Show more
  • Effect of consolidation treatments on mechanical behaviour of sandstone
    Publication . Ludovico-Marques, Marco; Chastre, Carlos
    2014Journal article Open access Show more
  • 2012Journal article Open access Show more
  • Flowrate time series processing in engineering tools for water distribution networks
    Publication . Ferreira, Bruno; Carriço, Nelson; Barreira, Raquel; Dias, Tiago; Covas, Dídia
    The current paper presents a comprehensive methodology for processing unevenly (and evenly) spaced flowrate time series for subsequent use in engineering tools, such as the calibration of hydraulic models or the detection and location of leaks and bursts. The methodology is a four-step procedure: (a) anomaly identification and removal, (b) short-duration gap reconstruction, (c) time step normalization, and (d) long- duration gap reconstruction. The time step normalization is carried out by a numerical procedure prior to the reconstruction process. This reconstruction process uses a pattern model coupled with regression techniques (i.e., autoregressive integrated moving average and exponential smoothing). The methodology is calibrated using Monte Carlo simulations applied to a water utility flowrate time series and validated with two additional time series from different water utilities. Obtained results demonstrate that the proposed methodology can process flowrate time series from water supply systems with different characteristics (e.g., consumption pattern, data acquisition system, transmission settings) both for normal operating conditions and during the occurrence of abnormal events (e.g., pipe bursts). This methodology is a very useful tool for the daily management of water utilities, preparing the time series to be used in different engineering tools, namely, hydraulic simulation, model calibration or online burst detectio
    2022Journal article Open access Show more