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The Special Issue on Advances in Modeling and Management of Urban Water Networks (UWNs) explores four important topics of research in the context of UWNs: asset management, modeling of demand and hydraulics, energy recovery, and pipe burst identification and leakage reduction. In the first topic, the multi-objective optimization of interventions on the network is presented to find trade-off solutions between costs and efficiency. In the second topic, methodologies are presented to simulate and predict demand and to simulate network behavior in emergency scenarios. In the third topic, a methodology is presented for the multi-objective optimization of pump-as-turbine (PAT) installation sites in transmission mains. In the fourth topic, methodologies for pipe burst identification and leakage reduction are presented. As for the urban drainage systems (UDSs), the two explored topics are asset management, with a system upgrade to reduce flooding, and modeling of flow and water quality, with analyses on the transition from surface to pressurized flow, impact of water use reduction on the operation of UDSs, and sediment transport in pressurized pipes. The Special Issue also includes one paper dealing with the hydraulic modeling of an urban river with a complex cross-section.

History of engineering & technology --- drainage network --- climate change --- rehabilitation --- optimization --- SWMM --- drainage networks --- flooding --- multi-objective optimization --- water network partition --- genetic algorithm --- hydraulic --- water quality --- actions --- asset management --- ANN --- prediction --- performance --- water utility --- water system --- NSGA-II --- GIS modeling --- leakage management --- urban water network management --- valve closing algorithm --- web 2.0 --- total suspended solids --- in-situ --- erosion --- sedimentation --- pressure pipe --- sewage --- water distribution systems --- pipe bursts --- hydraulic transients --- real-time control --- machine learning --- sediment transport model --- numerical simulation --- advection-dispersion equation --- water distribution networks --- transmission mains --- pump as turbine --- energy recovery --- hydropower --- multi-objective --- water consumption --- chaos theory --- local approximation --- Kelowna --- gene expression programming --- trapezoidal stretch --- transition stretch --- culvert --- open channel --- hydraulic factors --- sewer design --- stochastic sewer modelling --- wastewater quality --- household discharge --- reduced water consumption --- flow regime transition --- finite volume methods --- numerical oscillations --- numerical viscosity --- Preissmann slot model --- hydraulic simulation --- water demand --- emergency scenario --- intermittent water supply --- water management --- WaterGEMS software --- pressure control --- leakage reduction strategies --- water distribution system modeling --- urban drainage system modeling --- emergency scenarios --- leakage --- demand --- energy --- sediment transport

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The Special Issue on Advances in Water Distribution Networks (WDNs) explores four important topics of research in the framework of WDNs, namely simulation and optimization modelling, topology and partitioning, water quality, and service effectiveness. With regard to the first topic, the following aspects are addressed: pressure-driven formulations, algorithms for the optimal location of control valves to minimize leakage, the benefits of water discharge prediction for the remote real time control of valves, and transients generated by pumps operating as turbines. In the context of the second topic, a topological taxonomy of WDNs is presented, and partitioning methods for the creation of district metered areas are compared. In relation to the third topic, the vulnerability to trihalomethane is assessed, and a statistical optimization model to minimize heavy metal releases is presented. Finally, the fourth topic focusses on the estimation of non-revenue water, including leakage and unauthorized consumption, and on the assessment of service under intermittent supply conditions.

water distribution system --- artificial neural network --- 24 --- non-revenue water --- runaway conditions --- water quality (WQ) --- release of heavy metals (HMR) --- water service quality --- district metered areas --- modularity --- water distribution network --- optimization --- multiple source waters blending optimization (MSWBO) --- disinfection by-products --- multiple regression analysis --- snapshot simulation --- blending --- pump --- graph partitioning --- dual response surface optimization (DRSO) --- pressure-driven --- topological analysis --- pressure --- unsteady flow --- vulnerability --- water quality --- water distribution modelling --- real time control --- mathematical model --- water distribution network management --- energy recovery systems --- valve --- water hammer --- intermittent water supply --- leakage --- complex network theory

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The Special Issue on Advances in Water Distribution Networks (WDNs) explores four important topics of research in the framework of WDNs, namely simulation and optimization modelling, topology and partitioning, water quality, and service effectiveness. With regard to the first topic, the following aspects are addressed: pressure-driven formulations, algorithms for the optimal location of control valves to minimize leakage, the benefits of water discharge prediction for the remote real time control of valves, and transients generated by pumps operating as turbines. In the context of the second topic, a topological taxonomy of WDNs is presented, and partitioning methods for the creation of district metered areas are compared. In relation to the third topic, the vulnerability to trihalomethane is assessed, and a statistical optimization model to minimize heavy metal releases is presented. Finally, the fourth topic focusses on the estimation of non-revenue water, including leakage and unauthorized consumption, and on the assessment of service under intermittent supply conditions.

water distribution system --- artificial neural network --- 24 --- non-revenue water --- runaway conditions --- water quality (WQ) --- release of heavy metals (HMR) --- water service quality --- district metered areas --- modularity --- water distribution network --- optimization --- multiple source waters blending optimization (MSWBO) --- disinfection by-products --- multiple regression analysis --- snapshot simulation --- blending --- pump --- graph partitioning --- dual response surface optimization (DRSO) --- pressure-driven --- topological analysis --- pressure --- unsteady flow --- vulnerability --- water quality --- water distribution modelling --- real time control --- mathematical model --- water distribution network management --- energy recovery systems --- valve --- water hammer --- intermittent water supply --- leakage --- complex network theory --- water distribution system --- artificial neural network --- 24 --- non-revenue water --- runaway conditions --- water quality (WQ) --- release of heavy metals (HMR) --- water service quality --- district metered areas --- modularity --- water distribution network --- optimization --- multiple source waters blending optimization (MSWBO) --- disinfection by-products --- multiple regression analysis --- snapshot simulation --- blending --- pump --- graph partitioning --- dual response surface optimization (DRSO) --- pressure-driven --- topological analysis --- pressure --- unsteady flow --- vulnerability --- water quality --- water distribution modelling --- real time control --- mathematical model --- water distribution network management --- energy recovery systems --- valve --- water hammer --- intermittent water supply --- leakage --- complex network theory

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This book presents the paper form of the Special Issue (SI) on Smart Urban Water Networks. The number and topics of the papers in the SI confirm the growing interest of operators and researchers for the new paradigm of smart networks, as part of the more general smart city. The SI showed that digital information and communication technology (ICT), with the implementation of smart meters and other digital devices, can significantly improve the modelling and the management of urban water networks, contributing to a radical transformation of the traditional paradigm of water utilities. The paper collection in this SI includes different crucial topics such as the reliability, resilience, and performance of water networks, innovative demand management, and the novel challenge of real-time control and operation, along with their implications for cyber-security. The SI collected fourteen papers that provide a wide perspective of solutions, trends, and challenges in the contest of smart urban water networks. Some solutions have already been implemented in pilot sites (i.e., for water network partitioning, cyber-security, and water demand disaggregation and forecasting), while further investigations are required for other methods, e.g., the data-driven approaches for real time control. In all cases, a new deal between academia, industry, and governments must be embraced to start the new era of smart urban water systems.

Technology: general issues --- hydraulic modelling --- pressure control valve --- pressure management --- remote real-time control --- stochastic consumption --- water distribution system --- fault identification --- hydraulic transient --- inverse transient analysis (ITA) --- water distribution network --- optimization approach --- water distribution monitoring --- optimal sensor placement --- water network partitioning --- topological centrality --- smart water system --- framework --- smartness --- cyber wellness --- leakage --- sensitivity --- uncertainty --- entropy --- multi-criteria decision-making --- DEMATEL --- clustering --- district metered area --- network sectorization --- smart city --- water quality monitoring --- Internet of Things --- wireless sensor networks --- water treatment plant --- data analytics --- nitrate --- nitrite --- water demand forecasting --- hybrid model --- error correction --- chaotic time series --- least square support vector machine --- cross-correlation --- data spatial aggregation --- finite population effect --- metering --- sample mean --- sampling design --- standard error --- stochastic analysis --- water demand peak factor --- water distribution networks --- comparative analysis --- hydraulic measure --- multi-criteria decision analysis (MCDA) --- reliability index --- water distribution network (WDN) --- smart stormwater --- machine learning --- cluster analysis --- data science --- flooding detection --- rainwater harvesting --- water trading --- dual reticulation --- decentralized water supply --- agent-based modeling --- urban water management --- urban water consumption --- water demand data --- water data accessibility --- data resolution --- smart meter --- smart water systems --- cyber–physical security --- cyber-security --- cyber–physical attacks --- n/a --- water distribution systems --- cyber-attack detection --- blind sources separation --- FastICA --- cyber-physical security --- cyber-physical attacks