Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"Water distribution networks"”.
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Data based predictive control: Application to water distribution networks
… with complex industrial infrastructures such as water distribution networks. This sort of systems have several inputs and out- puts, complicate nonlinear dynamics, binary actuators and they are usually perturbed by disturbances and noise and require real-time control implemen- tation. The …
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Iron and manganese accumulation potential in water distribution networks
The occurrence of discoloured drinking water at customers’ taps, which is mainly caused by the deposition and release of iron (Fe) and manganese (Mn) in water distribution networks (WDNs), is a major concern for both customers and water companies. Increased concentrations of Fe and Mn in WDNs can …
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Optimal design of water distribution networks with reliability considerations
… that may be used to assess the reliability of water distribution systems. Such a tool can be used by design engineers to create systems which are both economical in total cost commensurate with meeting targets for a specified level of reliability.The introduction describes how water supply and …
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Redundancy-constrained minimum-cost design of water distribution networks
Redundancy of looped water distribution networks is quantified with expected shortage, a reliability surrogate which can represent frequency, duration and severity of damages caused by failures of components. Based on this surrogate and its variations (total expected shortage and allowable shortage …
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Pressure difference-based sensing of leaks in water distribution networks
… rely on the constant availability of fresh water. In regions where a local source of potable water is not available, a transportation and distribution pipe system is employed. When these pipes feature cracks, holes, or leaks, the result is a substantial waste of energy and natural resources. …
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Advanced computational techniques for pipe burst detection and localisation in water distribution networks
Pipe bursts cause a considerable loss of treated water, increase the risks of environmental contamination and are a health hazard for the end-user as they can create a passage for contaminants to enter water distribution networks (WDN). Identifying pipe burst locations will help water service …
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A life cycle assessment of energy harvesters in pre-existing European water distribution networks
… are designed to be installed in piping networks, open streams like wastewater and irrigation canals, and open channels like river or lagoon flow. The objective of this research is to characterize the energy potential of energy harvesting in existing fluid flow by performing an …
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Enhanced Pump Schedule Optimization For Large Water Distribution Networks To Maximize Environmental And Economic Benefits
… electricity consumption of pump stations of water distribution systems. Based on this ongoing research trend, about a decade ago, some commercial pump operation optimization software introduced to the market. Using metaheuristic and evolutionary techniques (e.g. Genetic Algorithm) make some …
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Understanding the microbiota in drinking water distribution networks – from municipal to indoor water supply systems
"A drinking water distribution system can be viewed as an ecosystem that is comprised of diverse microorganisms interacting with each other and the environment. These microorganisms are central to water quality integrity during distribution. This study investigated the diversity, structure, and …
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An evaluation of the pressure-leakage response of selected water distribution networks in South Africa
… one of the major factors influencing leakage in water distribution systems. For this reason, pressure management has become standard practice in reducing leakage in water distribution networks around the world. A range of N1 values have been published following studies of the impact of pressure …
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Evaluation of water quality in urban drinking water distribution networks: a case study in Johannesburg, South Africa
… of South Africa (RSA) access to drinking water is a constitutionally guaranteed human right. The supply of safe drinking water to consumers is a legal requirement and the numerical limits for drinking water quality are described in SANS 241:2015. However, in 2023 over 30% of RSAs Water …
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Métodos iterativos de análise hidráulica e dimensionamento ótimo por programação linear de redes de distribuição de água
… iteratives techniques of hydraulic analysis of water distribution networks according to Hardy Cross, Newton-Raphson and Linear Analysis methods, is introduced firstly. The best computational performance method, in case, the Newton-Raphson with a nodal formulation is used into an economical …
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Optimal Operation of Water and Power Distribution Networks
… the coordinated operation of our infrastructure networks. In this context, this thesis puts forth a comprehensive toolbox for the optimization of electric power and water distribution networks. On the analytical front, the toolbox consists of novel mixed-integer (non)-linear program (MINLP) …
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Quantitative dependability and interdependency models for large-scale cyber-physical systems
… infrastructures such as smart grids, intelligent water distribution networks, and intelligent transportation systems are prominent examples of cyber-physical systems. Developed countries are entirely reliant on these critical infrastructures, hence the need for rigorous assessment of the …
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Otimização de redes de distribuição de água: estudo de dois modelos
Two cost optimization models of water distribution networks are studied and a evaluation of the obtained solutions and computational performance are done. The first model analyzed transforms the optimization problem into a zero-one integer linear programming problem, which is solved by implicit …
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Assessment of local water distribution infrastructure management and maintenance challenges
… on addressing backlogs in the provision of water services through new infrastructure investment; however it failed to make sufficient investment in the maintenance and renewal of this infrastructure (SAICE, 2006). Older infrastructure is not being renewed or refurbished as required and …
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ADVANCED MODELING AND EFFICIENT OPTIMIZATION METHODS FOR REAL-TIME RESPONSE IN WATER NETWORKS
In response to a contamination incident in water distribution networks, effective mitigation procedures must be planned. Disinfectant booster stations can be used to neutralize a variety of contaminant and protect the public. In this thesis, two methods are proposed for the optimal placement of …
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Development of a Resilience Assessment Methodology for Networked Infrastructure Systems using Stochastic Simulation, with application to Water Distribution Systems
Water distribution systems are critical infrastructure systems enabling the social and economic welfare of a community. While normal failures are expected and repaired quickly, low-probability and high consequence disruptive events have potential to cause severe damage to the infrastructure and …
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Smart water network management with in-pipe leak detection robots
… designs to implement smarter, more autonomous water distribution networks (WDNs) and also improved the robots which will travel within the WDN's pipes to better differentiate pipe leaks from bumps in the pipes. Starting from the unit of the in-pipe leak detection robot, I investigated ways to …
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An Evaluation and Pressure-Driven Design of Potable Water Plumbing Systems
Potable water distribution systems are broken into major and minor distribution networks. Major water distribution networks refer to large-scale municipal pipe systems extending from the treatment plant to the upstream node of the water service line for buildings. Minor water distribution systems, …
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