Papers
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Deterioration Models and Service Life Prediction of Vertical Assets of Urban Water Systems
This study proposes a methodology for developing deterioration models and predicting the service lives of vertical assets of urban water systems (i.e., water storage tanks and pumping stations) using regression analysis. The main factors contributing to the deterioration of these assets are analyzed. Simple and multiple linear regression models of average and maximum deterioration are calculated for 22 water storage tanks and 17 wastewater pumping stations. Data on a set of four water storage tanks are used to validate the developed deterioration models. Service life prediction is carried out using the developed models and considering two maximum deterioration levels: the maximum recommended and admissible deterioration levels. Two water storage tanks are further studied to illustrate and discuss the effect of maintenance and rehabilitation interventions on asset service life by comparing the asset deterioration before and after the interventions.
Year: 2024
Number Pages:
19p..
Author(s): Cabral , M.; Loureiro, D.; Amado, C; Covas, D.
: Water Resources Research
Editor: AGU
Volume:
Volume 60, Issue 4.
Keywords: Urban water systems; Service life prediction; Deterioration models
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Integrating Uncertainty in Performance Assessment of Water Distribution Networks by Scenario Building
This paper presents and demonstrates a novel scenario-building methodology that integrates contextual and future time uncertainty into the performance assessment of water distribution networks (WDNs). A three-step approach is proposed: (i) System context analysis, identifying the main key factors that impact the WDN performance; (ii) Scenario definition, identifying the implicated WDN variables, describing its possible evolution, and conjugating them to further establish the reference scenario and the two most relevant and opposite ones; and (iii) Scenario modelling, simulating the WDN behaviour for those scenarios. The obtained spatial and temporal hydraulic results are further used to calculate performance metrics. The methodology is applied to a real WDN to assess resilience performance considering infrastructure asset robustness (real water loss performance indicator), service reliability (minimum pressure index), and service flexibility (network resilience index). A new formulation to assess the metric evolution over time is proposed, deducting the further-away performance results by using an uncertainty weight. The results demonstrate that the increase in metric amplitude for the opposite scenarios over time highlights future uncertainty, reflecting context uncertainty, and the comparison of metric spatial distribution (i.e., at the pipe/node levels) highlights critical areas with higher associated uncertainty.
Year: 2024
Number Pages:
18p..
Author(s): Carneiro, J.; Loureiro, D.; Cabral , M.; Covas, D.
: Water
Editor: MDPI
Volume:
Volume 16, Issue 7.
Keywords: Resilience metrics; Scenario modelling; Scenario planning; Aleatory uncertainty; Drinking water networks
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A comprehensive performance assessment system for diagnosis and decision-support to improve water and energy efficiency and its demonstration in Portuguese collective irrigation systems.
In regions with a strong seasonal or interannual asymmetry in the distribution of precipitation and higher frequency of droughts, collective irrigation systems are vital infrastructures for agricultural activity. Although operating for decades, several systems have ageing infrastructures, with relevant water losses and pumping energy inefficiencies. Consequently, the systems are not adequately designed or operated to meet current and future water demand. Therefore, rehabilitation to improve water and energy efficiency while ensuring infrastructure, economic sustainability and service quality is crucial. In this sense, comprehensive approaches using performance assessment to support the planning process or benchmarking between water users associations play an essential role in improving efficiency in collective irrigation systems.
Year: 2023
Number Pages:
15p..
Author(s): Loureiro, D.; Beceiro, P.; Moreira, M.; Arranja, C.; Cordeiro, D.; Alegre, H.
: Agricultural Water Management
Editor: Elsevier
Volume:
Vol- 275.
Keywords: Water Users Association; Water and energy efficiency; Performance assessment system; Decision support; Diagnosis; Collective irrigation systems
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Energy efficiency assessment in collective irrigation systems using water and energy balances: methodology and application
Many collective irrigation systems have been operating for decades, facing high degradation of existing infrastructures and huge water-energy efficiency problems. Predominantly composed of open canals, they have been partially or entirely converted into pressurised pipe systems, implying a considerable increase in energy consumption and operation and maintenance costs. Simple, easy-to-use, and comprehensive approaches for energy efficiency assessment in collective irrigation systems are needed for diagnosis and assisting decision-making on implementing adequate improvement measures. This research proposes and demonstrates an innovative approach based on the water and energy balances and performance indicators to assess the effect of water losses, network layout and operation, energy recovery, and equipment on energy efficiency. A novel methodology for energy balance calculation is proposed for open canal, pressurised and combined systems. The application to a real-life open canal system and network areas allowed the identification of efficiency problems mainly due to water losses in canals, followed by the dissipated energy in friction losses. Less critical are pumping and manoeuvring equipment inefficiencies. Also, a considerable excess of gravity energy is recovered in hydropower plants. In raising pipe systems, in which shaft input energy predominates and costs for pumping play a key role, surplus and dissipated energy in friction losses are the most relevant issues. Significant energy is lost in the water conveyance and distribution in both systems. Consequently, the potential to improve energy efficiency through water loss management, network layout, and operation improvement, besides pumping and manoeuvring equipment replacement, is considerable.
Year: 2023
Number Pages:
24p..
Author(s): Loureiro, D.; Beceiro, P.; Fernandes, E.A.; Alegre, H.; Covas, D.
: Irrigation Science
Editor: Spinger
Keywords: Water and energy balances; Irrigation systems; Energy efficiency
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Exploratory Analysis of Surrogate Metrics to Assess the Resilience of Water Distribution Networks
This study compares and discusses the adequacy of surrogate resilience metrics proposed in the literature for resilience assessment of drinking water systems concerning demand increase and network redundancy. A sensitivity analysis is carried out for increasing flow rates using a conceptual case study with different layouts and demand scenarios, selecting several metrics to assess the resilience of two real network areas. Resilience metrics based on surplus energy are sensitive to network layout and demand scenarios. The network resilience index considers hydraulic reliability and network diameter uniformity. In contrast, the weighted resilience index also considers the network topology and gives importance to pipes with higher flow rates. Entropy-based resilience metrics mainly rely on the network flows' uniformity and are sensitive to pipe redundancy. The entropy metric most adequate to assess the hydraulic capacity is the diameter-sensitive flow entropy, since it is sensitive to the velocity inside the pipes. Topology metrics cannot assess the hydraulic capacity though evaluate the system redundancy (meshed-ness coefficient), robustness (central-point dominance) and water transportation efficiency (average-path length). Surrogate resilience metrics do not assess the system performance during a failure. They indicate systems which are better prepared to overcome failure events and increased demand events, providing vital information to drinking water systems management.
Year: 2023
Number Pages:
16p..
Author(s): Carneiro, J.; Loureiro, D.; Covas, D.
: Water Resources Research
Editor: AGU
Volume:
Volume 59, Issue 8.
Keywords: Water Distribution Networks; Resilience; Surrogate Metrics
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From assessment to a decision: a global framework for the management of energy use in wastewater systems
A global framework to assess the energy use and efficiency in wastewater systems is presented, focusing on the development of a portfolio of energy use improvement measures specifically tailored to these systems. The framework includes a performance assessment system for energy efficiency in wastewater systems and an energy balance scheme. The development and analysis of the portfolio of measures included the following steps: (i) an extensive review and compilation of existing energy improvement measures on the urban water cycle, (ii) a tailored survey addressed to multidisciplinary teams of wastewater utilities, (iii) the consolidation of the portfolio of measures for wastewater systems with the identification of main benefits and drawbacks of each measure and (iv) the discussion of the application of the improvement measures. Results from the survey for the different assessed dimensions (e.g., priority, importance) of each measure are presented together with a specific analysis of wastewater utilities. The final portfolio is instrumental for utilities to select measures, decide on the priority ones and prepare an implementation plan.
Year: 2023
Number Pages:
16p..
Author(s): Jorge, C.; Almeida, M. C.; Covas, D.
: International Journal of Environmental Science and Technology
Editor: Spinger
Keywords: Wastewater systems; Portfolio; Improvement measures; Energy efficiency
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Implementação e calibração de um modelo de decaimento de cloro em sistemas de distribuição de água para reutilização
Com secas cada vez mais frequentes e prolongadas em Portugal, é necessário repensar medidas que permitam enfrentar a falta de água. A água residual tratada constitui uma fonte de água alternativa, a ser utilizada como água para reutilização (ApR) em usos compatíveis, como rega de espaços verdes e lavagem de ruas.A modelação do decaimento de cloro em Sistemas de Distribuição de ApR (SDApR) carece de estudos que proponham metodologias de implementação dos modelos, técnicas de trabalho experimental a nível laboratorial e exemplos de aplicação à escala real. A modelação contribui para promover uma gestão eficaz da desinfeção da ApR, ajudando a determinar dosagens de desinfetante, concentrações residuais nas redes e locais de cloragem.Neste artigo apresenta-se uma metodologia para modelar o decaimento de cloro em ApR usando o software EPANET-MSX. A metodologia envolveu três fases: desenvolvimento do modelo hidráulico, modelação do decaimento de cloro na água e modelação do decaimento de cloro devido às paredes do reservatório e condutas. O modelo foi aplicado num SDApR da área de Lisboa e calibrado com ensaios à escala real, permitindo simular o decaimento de cloro em diferentes pontos do SDApR ao longo do tempo e prever as necessidades de doseamento de cloro
Year: 2023
Number Pages:
12p..
Author(s): Costa, J.; Mesquita, E.; Ferreira, F.; Figueiredo, D.; Rosa, M. J.; Viegas, R.M. C.
Editor: APDA
Keywords: Epanet-MSX; Sistemas de distribuição de água para reutilização; Modelação do decaimento de cloro; Água para reutilização
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Improving climate resilience of critical assets. The ICARIA project
The number of climate-related disasters has progressively increased in the last two decades and this trend will drastically exacerbate in the medium- and long-term horizons according to climate change projections. In this framework, through a multi-disciplinary team and a strong background acquired in recent projects, ICARIA aims to promote the use of asset-level modeling to achieve a better understanding of climate related tangible direct and indirect impacts on critical assets due to complex, cascading, and compound disasters. Furthermore, it takes into account the related risk reduction provided by suitable, sustainable, and cost-effective adaptation solutions. ICARIA focuses on both (i) critical assets and services that were not designed for potential climate change-related impacts that can increase the unplanned outages and failures, and (ii) on housing, natural areas, and population. Cutting edge methods regarding climate scenario building, asset-level-coupled models, and multirisk assessment approaches will be implemented and replicated in three EU regions to understand how future climate scenarios might affect critical assets and to provide decision-making support tools to private and public risk owners to assess the costs and benefits of various adaptation solutions.
Year: 2023
Number Pages:
14p..
Author(s): Russo, B.; de la Cruz, A.; Leonne, M.; Evans, B.; Brito, R.; Havlik, D; Bügelmayer-Blaschek, M.; Pacheco, D.; Sfetsos, A.
: Sustainability
Editor: MDPI
Volume:
Volume 15, Issue 19.
Keywords: Cascading effects; Compound events; Asset modeling; Climate resilience; Critical assets
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Improving mixing and renewal in drinking water storage tanks: lessons learnt and practical measures
This paper investigates the effect of different types of structural and operational measures on water mixing and renewal time in circular and rectangular cross-section water storage tanks, aiming at a better understanding of the flow dynamics to find practicable solutions to improve their design, rehabilitation and operation. An experimental programme, including traditional tracer and dye tracer tests, was carried out in small-scale tanks for different configurations and operating conditions. Two tanks were tested with and without interior structures, with the inlet/outlet pipes at different locations and for constant and variable water level. The main findings are that: i) the most effective measure is operating with fill-and-draw cycles, however, for tanks operated nearly full structural measures are recommendable; ii) reducing the inlet pipe diameter and installing nozzles near the tank bottom improve the mixing conditions; iii) the use of baffles is recommendable when the inlet and outlet pipes are very close.
Year: 2023
Number Pages:
13p..
Author(s): Pinheiro, A.; Vaz, S.; Monteiro, L.; Almeida, M. C.; Covas, D.
: Urban Water Journal
Editor: Taylor and Francis
Volume:
Volume 20, nº 7.
Keywords: Improvement measures; Short-circuiting; Water renewal; Water mixing; Water storage tanks
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Improving the pharmaceutical compounds control in two activated sludge wastewater treatment plants: key operating conditions and monitoring parameters
The control of pharmaceutical compounds (PhCs) in urban wastewater treatment plants (WWTPs) is an issue of health and environmental relevance, expected to become mandatory in the European Union and beyond, but studies at full scale are still scarce. A long-term (2.5-year) full-scale study addressing practical strategies for controlling PhCs was conducted in two activated sludge WWTPs with nitrification (BEI with A2O process; FNW with oxidation ditch). The results showed similar removal patterns in both plants
Year: 2023
Number Pages:
14p..
Author(s): Silva, C.; Almeida, C.M.M.; Rodrigues, J.A.; Sofia, S.; Coelho, R.; Martins, A.; Lourinho, R,; Cardoso, E.; Cardoso, V.V.; Benoliel, M. J.; Mesquita, E.; Ribeiro, R.; Rosa, M. J.
: Journal of Water Process Engineering
Editor: Elsevier
Volume:
54.
Keywords: Urban wastewater treatment; Treatment conditions; Pharmaceutical compounds; Biodegradation-sorption classes; Activated sludge treatment
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Comunicação
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Performance indicators and their application in management of urban water services
N/A
Year: 2001
Number Pages:
19 pp.
Author(s): Alegre, H.
Editor: ******
Info
Performance Indicators for Wastewaters Services Towards a Manual of Best Practice
N/A
Year: 2001
Author(s): Matos, R. S.; Cardoso, M. A.; Duarte, P.; Ashley, R.; Molinari, A.; Shulz, A.
Editor: ******
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Porous pavement foundations: a new solution with hollow precast concrete products
N/A
Year: 2001
Author(s): Degas, G.; Matos, R. S.
Editor: ******
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Realización de balances / auditorías de pérdidas en sistemas de abastecimiento
N/A
Year: 2001
Number Pages:
20 pp.
Author(s): Alegre, H.; Cabrera, E.
Editor: ******
Info
Relato Nacional do Tema Performance assessment
N/A
Year: 2001
Number Pages:
4 pp.
Author(s): Alegre, H.
Editor: ******
Info
Relato Nacional do Tema Stormwater Management
N/A
Year: 2001
Number Pages:
4 pp.
Author(s): Matos, R. S.
Editor: ******
Info
Saving urban water in Portugal: assessing the potencial of measures and strategies for implementation
N/A
Year: 2001
Author(s): Almeida, M. C.; Melo Baptista, J.; Vieira, P.; Silva, A. M.
Editor: ******
Info
Water and wastewater disinfection in Portugal
N/A
Year: 2001
Author(s): Vieira, P.; Matos, J. S.
Editor: ******
Info
Wet weather water quality modelling of a Portuguese urban catchment: difficulties and benefits
N/A
Year: 2001
Author(s): David, L. M.; Matos, R. S.
Editor: ******
Info
As soluções de controlo na origem de águas pluviais aplicação a um caso de estudo
N/A
Year: 2000
Author(s): Galvão, A.; Ferreira, F.; Matos, J. S.; Matos, R. S.
Editor: ******
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Books
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Quality Assessment Guide for Water and Waste Services Provided to Users: 4th Generation Assessment System
The Technical Guide presents the 4th generation of the service quality assessment system, which abandons some 3rd generation indicators and adds new ones to respond to the latest challenges to supply services, urban waste water management and urban waste management. Changes are also made to definitions and benchmarks for some indicators are adjusted.
Year: 2023
Number Pages:
345p..
Author(s): Cardoso, M. A.; Rosa, M. J.; Brito, R.; Silva, C.; Beceiro, P.; Jorge, C.; Alegre, H.; Martinho, G.; Pina, J.; Silveira, A.; Alves, A.V.; Brito Ana, J.; Ramos, M.; Carrega, M.
Editor: ERSAR/NOVA
Keywords: Benchmarking; Performance indicators; Waste services; Water services; Quality assessment
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Avaliação da eficiência energética nos serviçoes urbanos de águas. Guia para diagnóstico, priorização de alternativas, nonitorização e revisão do plano de ação
O projeto Avaler+
Year: 2021
Number Pages:
55 pp..
Author(s): Loureiro, D.; Silva, C.; Cardoso, M. A.; Alegre, H.; Cabral , M.; Covas, D.; Rosa, M. J.
Editor: LNEC
Keywords: Serviços urbanos de águas; Plano de ação; Eficiência energética; Diagnóstico; Avaliação de desempenho
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Technical Guidelines PAC/MF
These technical guidelines provides guidance on the use of the hybrid process of powdered activate carbon adsorption and ceramic microfiltration for sustainable drinking water production. They were developed based on the field demonstration of the technology, in Portugal, with a pilot prototype, within the LIFE Hymenb project LIFE12 ENV/PT/001154 "Tailoring hybrid membrane processes for sustainable drinking water production", conducted by LNEC - the National Civil Engineering Laboratory and Águas do Algarve, S.A.
Year: 2017
Number Pages:
29 p.
Author(s): Campinas, M.; Viegas, R.M. C.; Silva, C.; Rosa, M. J.
Editor: LNEC
Keywords: Technical guidelines; LIFE Hymemb; Emerging contaminants; Drinking water treatment; Ceramic microfiltration; Activated carbon adsorption
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Guia de avaliação da qualidade dos serviços de águas e resíduos prestados aos utilizadores - 2ª Geração do sistema de avaliação
O objetivo do presente Guia é a apresentação e a especificação dosistema correspondente à 2.ª geração de avaliação da qualidade dosserviços de abastecimento de água, de saneamento de águas residuaisurbanas e de gestão de resíduos urbanos prestados pelas entidadesgestoras sujeitas a regulação.Este sistema constitui uma peça fundamental do modelo de regulaçãoem implementação pela ERSAR, sumariamente descrito neste Guia emais detalhadamente descrito em [1], nomeadamente no que respeitaà componente da regulação da qualidade do serviço, de forma a tornarpossível a avaliação quantificada.Note-se que, de acordo com o disposto na alínea e) do n.º 1 do artigo 5.ºdo Decreto-Lei n.º 277/2009, de 2 de outubro, a ERSAR tem atribuiçõesnão apenas para assegurar a regulação da qualidade de serviço prestadoaos utilizadores pelas entidades gestoras, mas também para avaliaro desempenho dessas entidades, promovendo a melhoria dos níveis deserviço. É no quadro destas atribuições que se pretende promover estesistema de avaliação da qualidade dos serviços de águas e resíduos.A 2.ª geração do sistema de avaliação da qualidade do serviço resultouda análise crítica do sistema de indicadores adotado na 1.ª geração e darespetiva aplicação desde 2004 ao universo das entidades concessionáriase teve em conta o estado atual de conhecimentos e a experiênciainternacional entretanto adquirida.Para além da identificação e da especificação de todos os componentesdo sistema de avaliação, e em particular do conjunto de indicadores dequalidade do serviço a utilizar em cada um dos três tipos de serviços,são também definidos os procedimentos de avaliação, através dadefinição da informação a obter, do cálculo de indicadores, da sua interpretaçãoe análise comparativa, numa perspetiva de benchmarking, eda produção do relatório de síntese.
Year: 2012
Number Pages:
256p.
Author(s): entidade LNEC
Editor: ERSAR/LNEC
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Adaptação e Sustentabilidade de Serviços de Abastecimento de Água e de Águas Residuais - RESUMOS
N/A
Year: 2010
Number Pages:
425p.
Author(s): entidade LNEC
Editor: APESB
Info
Gestão patrimonial de infra-estruturas de abastecimento de água - Uma abordagem centrada na reabilitação
O texto está organizado em três partes e um conjunto de anexos (Figura 1.1). A primeira parte é de enquadramento geral, na segunda apresenta
Year: 2010
Number Pages:
510p.
Author(s): Covas, D.; Alegre, H.
Editor: ERSAR / LNEC / IST
Keywords: Sistema de abastecimento de água; Rede de distribuição; Legislação; Guia; Eta; Captação de água; Água; Adutora
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Gestão patrimonial de infra-estruturas de águas residuais e pluviais - Uma abordagem centrada na reabilitação
A gestão patrimonial de infra
Year: 2010
Number Pages:
362p.
Author(s): Almeida, M. C.; Cardoso, M. A.
Editor: ERSAR / LNEC
Keywords: Sistema de drenagem de águas residuais; Saneamento; Guia; Etar; Emissário
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Guia de avaliação da qualidade dos serviços de águas e resíduos prestados aos utilizadores. 2ª Geração do sistema de avaliação
O objectivo do presente Guia é a apresentação e a especificação do sistema correspondente à 2.ª geração de avaliação da qualidade dos serviços de abastecimento de água, de saneamento de águas residuais urbanas e de gestão de resíduos urbanos prestados pelas entidades gestoras sujeitas a regulação. Este sistema constitui uma peça fundamental do modelo de regulação em implementação pela ERSAR, sumariamente descrito neste Guia e mais detalhadamente descrito em [1], nomeadamente no que respeita à componente da regulação da qualidade do serviço, de forma a tornar possível a avaliação quantificada. Note-se que, de acordo com o disposto nas alíneas e) do artigo 5.º do Decreto-Lei n.º 277/2009, de 2 de Outubro, a ERSAR tem atribuições não apenas para assegurar a regulação da qualidade de serviço prestado aos utilizadores pelas entidades gestoras bem como para avaliar o desempenho dessas entidades, promovendo a melhoria dos níveis de serviço. É no quadro destas atribuições que se pretende promover este sistema de avaliação da qualidade dos serviços de águas e resíduos. A 2.ª geração do sistema de avaliação da qualidade do serviço resultou da análise crítica do sistema de indicadores adoptado na 1.ª geração e da respectiva aplicação desde 2004 ao universo das entidades concessionárias e teve em conta o estado actual de conhecimentos e a experiência internacional entretanto adquirida. Para além da identificação e da especificação de todos os componentes do sistema de avaliação, e em particular do conjunto de indicadores de qualidade do serviço a utilizar em cada um dos três tipos de serviços, são também definidos os procedimentos de avaliação, através da definição da informação a obter, do cálculo de indicadores, da sua interpretação e análise comparativa, numa perspectiva de benchmarking, e da produção do relatório de síntese.
Year: 2010
Author(s): entidade LNEC
: ERSAR / LNEC
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Strategic Asset Management of Water and Wastewater Infrastructures
Invited papers from the IWA Leading Edge Conference on Strategic Asset Management (LESAM), Lisbon, October 2007
Year: 2009
Number Pages:
536p.
Author(s): Alegre, H.; Almeida, M. C.
Editor: IWA Publishing
Keywords: Infrastructures; Wastewater; Water supply; Asset management
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Modelação e análise de sistemas de abastecimento de água
A simulação matemática dos sistemas de abastecimento de água é hoje em dia uma ferramenta indispensável aos serviços de água, para apoio a uma gestão técnica racional. O campo de aplicação é variado, sendo um auxiliar das actividades de planeamento, de projecto, de operação e demanutenção. Destacam-se o apoio ao dimensionamento de novas redes, aos programas de reabilitação, ao licenciamento de novas ligações, ao controlo de perdas de água, ao controlo da qualidade da água nas redes ou à gestão optimizada de energia.Em Portugal, o desenvolvimento e a aplicação de modelos matemáticos de sistemas de distribuição de água iniciou-se na década de 80, com o modelo da rede de Almada, elaborado em 1981 pelo LNEC. Depois dealguns anos em que a actividade realizada se centrou essencialmente no ambiente científico e académico, as empresas de consultoria começaram a ganhar espaço de mercado na prestação deste tipo de serviços para as entidades gestoras. Numa fase inicial os requisitos computacionais eramconsideráveis
Year: 2006
Number Pages:
335.
Author(s): Coelho, S. T.; Loureiro, D.; Alegre, H.
Editor: IRAR / LNEC
Volume:
Série Guias Técnicos nº 4.
Keywords: Água
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Capítulo de Livro
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Sanitation Approaches & Solutions
Water scarcity and asymmetric space-time distribution is driving many countries to seek nonconventional water sources. Treated wastewater is an emerging alternative water source but, depending on its use(s), it may require an increased level of water treatment. At the same time, the list of emerging contaminants (ECs), including pharmaceutical compounds (PhCs), of great relevance to the environment and to public health continues to grow. Further, many of these contaminants are partly or strongly resistant to conventional treatment in water and wastewater treatment plants (WTPs and WWTPs). Therefore, advanced treatment processes are being developed or optimised for improved PhC control. Amongst them, hybrid processes of adsorption
Year: 2018
Number Pages:
pp 97-108.
Author(s): Viegas, R.M. C.; Mesquita, E.; Campinas, M.; Almeida, C.M.M.; Rosa, M. J.
: Sanitation Approaches & Solutions and the Sustainable Development Goals
Editor: ERSAR, EWA, APESB, CERIS
Keywords: Water reuse; Water reclamation; Pharmaceutical compounds; PAC/NF; Hybrid membrane processes
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Development of soft sensors based on analytical and spectral data on a real small size wastewater treatment plant
Advances in measurement and automation technologies enabled the deployment of monitoring systems with data acquisition at high frequency in Wastewater Treatment Plants (WWTP). The aim of this work is the design of soft sensors to predict hard-to-measure quality variables of wastewater required for mechanistic modeling of the biological treatment system in a real municipal WWTP. The input data collected in the WWTP using a flowmeter and spectro-photometric and electrochemical online probes, sampling campaigns and on-line analysis, was used for the development of soft sensors by multivariate analysis, like Principal Component Analysis (PCA) and Partial Least Squares (PLS) regression. Exploratory data analysis was performed in order to detect outliers, patterns and correlations. PLS models for soft sensors were developed using leave-one-out cross validation and the predictive capacity of independent data was evaluated by root mean square error (RMSE). The normalized RMSE obtained for organic nitrogen prediction were 19.5% and 18.1%, using sensors with analytical and spectral data, respectively. The possibility of using spectro-photometric probes providing measurements of a single wavelength was evaluated in order to reduce the online monitoring investment costs.
Year: 2017
Number Pages:
323-333pp.
Author(s): Leitão, C.; Fernandes, L.; Ribeiro, R.; Almeida, M. C.; Pinheiro, C. C.; Pinheiro, H. M.
: CONTROLO 2016. Lecture Notes in Electrical Engineering
Editor: Springer
Volume:
vol 402.
Keywords: Partial least squares; Online monitoring; Soft sensors; Wastewater treatment; Prediction; Municipal WWTP
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Resiliência e gestão do risco no turismo
Capítulo de livro sobre planeamento e desenvolvimento turístico em que é desenvolvida a temática de resiliência e gestão do risco no turismo. São focados aspetos que incluem conceitos de base em resiliência e risco, as categorias de risco relevantes em turismo, a abordagem estruturada para a gestão do risco da norma ISO 31000:2009 e eixos de atuação para aumentar a segurança e a resiliência no turismo.
Year: 2017
Number Pages:
105-120pp.
Author(s): Almeida, M. C.
: Planeamento e desenvolvimento turístico
Editor: Lidel
Keywords: Turismo; Gestão do risco; Resiliência
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Chapter 12: Economic and operational aspects
Municipalities and/or sewer operators have to decide investment strategies to rehabilitate and upgradeboth the efficiency and quality of their sewer systems. Frequently, such decisions are based on limitedinformation and do not consider simultaneously the sewer pipes, the wastewater treatment plant andthe receiving environment, especially groundwater. In order to provide some basic working elements tohelp operators in making such decisions, Work Area 4 (WA4) within the APUSS project, described in thepresent chapter included three topics:i) the definition of a set of infiltration/exfiltration specific performance indicators, PIs;ii) the proposition of a generic multi-criteria methodology to compare investment strategieswhich is elaborated separately in Chapter 10 and;iii) the analysis of cost structures of sewer systems and costings for the new tracer methods proposed in the APUSS methodology (as outlined in Chapter 2).
Year: 2010
Number Pages:
159-167.
Author(s): Cardoso, M. A.; Frehmann, T.
Editor: IWA
Info
Performance indicators as a management support tool, capítulo 9 do livro Urban Water Supply Infrastructure Management Handbook
N/A
Year: 2002
Number Pages:
9.1-9.74.
Author(s): Alegre, H.
Editor: ******
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Tese de Doutoramento
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Gestão patrimonial de infra-estruturas de abastecimento de água e de drenagem e tratamento de águas residuais
Esta publicação corresponde ao Programa de Investigação e ao Programa de Pós-Graduaçãoelaborados pela autora nos termos estabelecidos no artigo 30.º do Decreto-lei n.º 124/99, de20 de Abril, com vista à prestação de provas de habilitação para o exercício de funções decoordenação de investigação científica, realizadas em 31 de Janeiro e 1 de Fevereiro de 2008.Com o Programa de Investigação pretende-se contribuir para o estabelecimento de umaestratégia de desenvolvimento técnico e científico no âmbito da gestão patrimonial deinfra-estruturas de abastecimento de água e de drenagem de águas residuais. Trata-se de umprograma dirigido de forma privilegiada para as necessidades nacionais, mas que atende aocontexto internacional, tendo em vista o papel que o País pode desempenhar nodesenvolvimento do conhecimento nesta matéria, em sentido lato. Propõe-se uma estratégiaassente no estabelecimento de parcerias interdepartamentais e interinstitucionais, ancorada noNúcleo de Engenharia Sanitária do Departamento de Hidráulica e Ambiente do LNEC.Neste documento começa-se por fazer uma apresentação geral do programa, especificando osobjectivos e expondo as razões para a escolha do tema. Propõe-se a seguir uma visita guiadasobre o tema, que permite a um leitor menos familiarizado obter uma panorâmica geral.A sequência de capítulos seguinte é dedicada à apresentação e discussão do estado actual deconhecimentos. Inicia-se pelas abordagens integradas para apoio à GPI, seguindo-se depoispara as principais vertentes de análise na GPI: desempenho, custo e risco.Faz-se seguidamente uma análise de lacunas e prioridades de investigação. Termina-se com aapresentação de um programa de estudos, estruturados em quatro linhas de investigação:Linha 1: GPI
Year: 2009
Author(s): Alegre, H.
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Pollutant Transformation Processes in Sewers under Aerobic Dry Weather Flow Conditions
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Year: 2000
Author(s): Almeida, M. C.
Editor: ******
Quebramares não-convencionais
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Relatório Científico
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2.4 Lisbon. In Second intermediate synthesized report of technology progress and state of play across all the LLs.
This internal report of Work Package 2
Year: 2023
Author(s): Rosa, M. J.; Figueiredo, D.; Lourinho, R,; Mendes, R.; Ribeiro, R.; Oliveira, M. M.; Viegas, R.M. C.; Cardoso, P.; Teixeira, P.
Keywords: Water management; Water reuse; KW - technological solutions
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Dedicated project page on the beneficiaries
This document presents the links to and the contents of the
Year: 2023
Author(s): Silva, C.; Jorge, C.; Rosa, M. J.
Keywords: Contact; Results; Pages; Structure
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Drivers and barriers: proposal a new governance model
This report offers an overview of key present challenges for water governance across the 6 Living Labs of B-WaterSmart: Alicante (Spain), Bodø (Norway), East Frisia (Germany), Flanders (Belgium), Lisbon (Portugal) and Venice (Italy), according to the 12 OECD Principles for Water Governance (2015). It includes a set of recommendations for the LLs of the project and beyond, with a view to a more adaptive, fair and resilient water governance, along the lines of the circular economy and a fuller integration into the nexus of water, energy and waste
Year: 2023
Author(s): Schmidt, L.; Gomes, C.; Martin, J.; Quina, A.; Santos, E.; Casals, I.; Damman, S.; Lund, H.; Glotzbach, R.; van Dam, A.; Paepe, S.; Boeckaert, C.; Ribeiro, R.; Rosa, M. J.; Schwesig, D.; Hein, A.; Obe
Keywords: Circular economy; KW - water governance
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Engineered and reusable nanoporous carbons for advanced water treatment.
This document reports the activity developed in the second year of the EMPOWER+ project including the progress and results of the Task 1 & 2 - PACs, GACs and magnetic PAC synthesis and characterization, Task 3 - Batch adsorption studies with the produced PACs and GACs, Task 4 - Rapid small colunm tests and Task 7 - GAC regeneration assays.
Year: 2023
Author(s): Mestre, A.S.; Mesquita, E.; Duque, L.P.; Rosa, M. J.; Viegas, R.M. C.; Betz, W.; Carvalho, A. P.
Keywords: Pharmaceutical compounds; Column and hybrid adsorption processes; Drinking water treatment; Novel activated carbons; Activated carbon adsorption
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Final version of the water-smartness assessment framework
The B-WaterSmart project, and specifically through WP6, aims at providing an assessment framework to support multi-stakeholder and strategic decision-making towards the transition to a water-smart society that recognizes multiple values and facilitates the active participation of a varied set of actors.
Year: 2023
Author(s): Silva, C.; Cardoso, M. A.; Rosa, M. J.; Alegre, H.; Ugarelli, R.; Bosco, C.; Raspati, G.; Azrague, K.; Bruaset, S.; Damman, S.; Koop , S.; Munaretto, S.; Melo, M.; Gomes, C.; Rosell, L. F.; Schmuck, A
Keywords: International Water Association; European Commission; Biological Oxygen Demand; Assessment Criteria; B_watersmart
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Management Plan with green management principles
This document is the Management Plan for the LIFE Fitting project. Its purpose is to establish the project management composition, responsibilities, and processes to be followed throughout the project duration regarding project management. This project management plan is a deliverable of task 1.1 and is expected to be updated whenever a change in project requirements occurs or a risk or unexpected deviation from the planned course of action is encountered.
Year: 2023
Author(s): Campinas, M.; Silva, C.; Rosa, M. J.
Keywords: Reporting; Monitoring; Work plan; Roles; Management
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MS22: Final version of strategic agendas agreed by CoPs
Milestone (MS) 22 contains the Living Lab (LL) strategic agendas (SA) as agreed with stakeholders in the Communities of Practice (CoPs). MS22 builds upon MS6 and MS12 and illustrates the changes to the SAs that occurred as result of the discussion with stakeholders. An overview of discussions held during the CoP meetings concerning the SAs is provided. The next steps with the SAs are also discussed.
Year: 2023
Author(s): Glotzbach, R.; Munaretto, S.; Mateo, M.R.; Casals, I.; Collette, R.A.; Lyngstad, S.U.; Elveos, M.; Muthanna, T.M.; Oberdörffer, J.; Krömer, K.; Tieman, Y.; Hesse, K; Wencki, K.; Paepe, S.; Freitas, C.
Keywords: Communities of practice; Performance assessment; Strategic objectives; Strategic agendas
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Quarterly specification exchange T2.4 to T3.5 completed
In this document, the Lisbon Living Lab presents the sequence of quarterly exchanges of specification between Task (T) 2.4 and T3.5 that occurred from March 2021 (M7) until February 2023 (M30). The output of subtasks 2.4.2, 2.4.3 and 2.4.4 fed the development of the software tools in T3.5 and its outputs. A short and concrete description of the exchange of specification is provided.
Year: 2023
Author(s): Ribeiro, R.; Mendes, R.; Cardoso, P.; Rosa, M. J.
Keywords: Living Lab; Water-smart solutions; B_watersmart
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The monitoring, negotiation and decision support solutions toolkit
This report documents the final release of the water cycle modelling and assessment solutions toolkit, which is comprised of the following ten tools: the water reuse strategic platform (#16), the environment for decision support and alternative course selection (#17), Re-Actor (#18), the sludge management platform (#19), the UWC observatory (#20), the stormwater reuse management system (#21), the Nessie System (#29), the Environmental Dashboard (#30), the Digital Enabler (#32) and the climate-readiness certification tool (#33) . It includes the following aspects: tool description, attributes and information around pre-existing background, developments and advancements within the project, navigation and primary functionalities, interoperability, indicative applications and synergistic benefits and how to access each tool and test data. It presents the use of the tools in the LLs by explaining the tools' integrative use, conceptual links, data flows and pilot interactions.
Year: 2023
Author(s): Santos, E.; Sarrias, M.; Casals, I.; Kossieris, P.; Pantazis, C.; Spartalis, I.; Kristiansen, V.; Lyngstad, S.U.; Collette, R.A.; Gratl, F.; Muthanna, T. M.; Bosco, C.; Ugarelli, R.; Vennesland, A; Ma
Keywords: Urban water cycle; KW - digital solutions
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The water cycle modelling and assessment solutions toolkit
This report documents the final release of the water cycle modelling and assessment solutions toolkit, which is comprised of the following eight tools: UWOT #22, regional demand-supply matching GIS tool #23, reclaimed water distribution network water quality model #24, water-energy-phosphorous balance planning module #25, QMRA+ #26, risk assessment for urban water reuse module #27, short-term demand forecasting tool #28 and SuTRa #31 and complements the other toolkit. It includes the following aspects: tool description, attributes and information around pre-existing background, developments and advancements within the project, navigation and primary functionalities, interoperability, indicative applications and synergistic benefits and how to access each tool and test data. It presents the use of the tools in the LLs by explaining the tools' integrative use, conceptual links, data flows and pilot interactions.
Year: 2023
Author(s): Lykou, A.; Storelli, D.; Makropoulos, C; Manouri, S.; Pronk, G.; Bousiotas, D.; Stofberg, S.; Van Huijgevoort, M.H.J.; Smeets, P.; van der Schans, M.; Kroll, S.; Raes, S.; Joris, I.; Van Bauwel, F.; G
Keywords: Urban water cycle; KW - digital solutions
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Outro
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AWARE-P vence prémio alemão e conquista novo reconhecimento internacional
EXCLUSIVO: AWARE-P vence prémio alemão e conquista novo reconhecimento internacional: É a primeira vez que é distinguido um projecto de um país que não fala alemão, entrevista de Ana Santiago (Jornalista do Jornal Água & Ambiente - Portal Ambiente Online) a Helena Alegre, 19 de Agosto de 2014
Year: 2014
Number Pages:
1.
Author(s): Alegre, H.
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Processos de pré oxidação e de desinfeção
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Year: 2014
Number Pages:
36 slides.
Author(s): Rosa, M. J.
Editor: APDA
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Vamos premiar quem aproveitou melhor a tecnologia
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Year: 2014
Number Pages:
1p.
Author(s): Alegre, H.
Editor: Ambiente on-line
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Ciência e inovação
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Year: 2012
Number Pages:
1p.
Author(s): Alegre, H.
Editor: About Media
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A engenharia sanitária no DHA em 2023
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Year: 2009
Author(s): Alegre, H.
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Aplicações do modelo SWMM a casos de Estudo.
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Year: 2009
Author(s): Brito, R. S.; David, L. M.
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Modelação dinâmica de sistemas de drenagem: Casos de estudo nacionais
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Year: 2009
Author(s): Ferreira, F.; David, L. M.; Brito, R. S.
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Modelação dinâmica de sistemas de drenagem: Princípios de modelação e principais modelos existentes
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Year: 2009
Author(s): Ferreira, F.; David, L. M.; Matos, J. S.
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Modelação estatística do consumo nocturno doméstico de água
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Year: 2009
Author(s): Borba, R.; Amado, C.; Pacheco, A.; Loureiro, D.; Rebelo, M.; Alegre, H.; Coelho, S. T.; Covas, D.; Pina, A.
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O tratamento de água para consumo humano face à qualidade da água de origem
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Year: 2009
Author(s): Rosa, M. J.; Vieira, P.; Menaia, J.
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