water network analysis Articles

  • Life Cycle Analysis of Water Networks

    Abstract Water authorities around the world are faced with the problem of ageing distribution networks and often only limited historical data on which to base a sound long term, cost efficient replacement policy. The LICAN approach to whole of life costing is introduced and a hypothetical case study is used to demonstrate the importance of such an approach. A selection of pipe networks ...


    By TRIC Tools Inc.

  • Spatial network generation tool for water distribution network design and performance analysis

    The research presented in this paper aims at the support tool for generation of multiple networks with preset or randomised properties. To explore particular phenomena, water distribution analysis may require a coherent set of cases. Readily available in the literature are simple synthetic networks used for benchmarking, either real-life cases that are too diverse in size and configuration. The ...


    By IWA Publishing

  • Analysis of flushing-path effects in water-distribution networks

    The unidirectional and conventional flushing methods are compared in this study and the water amount and flow velocity at junctions within an EPANET water distribution network are compared. In the unidirectional method, the necessary flow and water pressure for the minimum flow velocity for flushing become greater when pipe diameter exceeds a certain value. Therefore, the maximum length of ...


    By IWA Publishing

  • Uncertainty quantification of pressure-driven analysis for water distribution network modeling

    The hydraulic analysis of water distribution networks (WDNs) is divided into two approaches: namely, a demand-driven analysis (DDA) and a pressure-driven analysis (PDA). In the DDA, the basic assumption is that the nodal demand is fully supplied irrespective of the nodal pressure, which is mainly suitable for normal operating conditions. However, in abnormal conditions, such as pipe failures ...


    By IWA Publishing

  • Water distribution network calibration using enhanced GGA and topological analysis

    The calibration of hydraulic models of water distribution networks (WDN) is of preeminent importance for their analysis and management. It is usually achieved by solving a constrained optimization problem based on some priors on decision variables and the demand-driven simulation of the entire network, given the observations of some hydraulic status variables (i.e. typically nodal heads and ...


    By IWA Publishing

  • A network analysis of transboundary water cooperation in La Plata Basin

    When do countries cooperate in transboundary waters? One of the largest in the world, the La Plata Basin covers part of Argentina, Bolivia, Brazil, Paraguay, and Uruguay. These five countries co-manage the basin through a network of legal agreements, domestic and international organizations, and cooperative projects. In this paper, we examine the network structure of cross-national water ...


    By IWA Publishing

  • The influence of the existing network layout on water distribution system redesign analysis

    The methodologies usually adopted in water distribution system redesign problems consider the topology of the network as an input fixed datum; optimisation solely allowing for the duplication/substitution of existing components. In order to contribute to the identification of optimal solutions that may lead to a lower risk of failure to supply the required water, together with a lower redesign ...


    By IWA Publishing

  • The Need for a Total View of Water Networks

    The water industry is not short of software offerings, and so the arguments in favour of yet another software program had better be very good indeed. In this article we examine how one very significant community of users – operations managers, engineers and planners - have largely had their specific needs overlooked; we identify the type of system needed to fulfil their requirements and the ...


    By Innovyze

  • Evaluation of drinking water quality in a water supply distribution network based on Grey correlation analysis

    The lack of access to clean drinking water adversely affects public health and life expectancy in many developing countries. However, not all cities' drinking water can currently meet drinking water standards. Therefore, determining reasonable water quality changes and the influence of various factors on water quality is important for improving drinking water quality. The objective of this study ...


    By IWA Publishing

  • Water quality comprehensive evaluation method for large water distribution network based on clustering analysis

    In order to evaluate water quality for a large water distribution network comprehensively, a two-stage classification method was used and the clustering methods, self-organizing map (SOM), K-means method and fuzzy c-mean (FCM), were represented. With these clustering methods, the pipes of a large real water distribution network were divided into some groups considering one or more water quality ...


    By IWA Publishing

  • Leakage estimation in developing country water networks based on water balance, minimum night flow and component analysis methods

    Estimating leakage in developing countries’ water networks is challenging as accurate records are needed. Three leakage estimation methods were compared to ascertain which was most suitable for such networks. The factors accounting for the differences in application of these methods to water networks were also ascertained. The water balance and component analysis methods were compared with the ...


    By IWA Publishing

  • A new systematic technique for retrofit of water network

    This paper presents a new systematic technique for the retrofit of existing water network based on pinch analysis. This technique, which was applied on a paper mill, consists of three main steps: Network Diagnosis, Network Retrofit and Network Evolution. Network diagnosis step provides a good understanding of the existing water network through the use of a new tool called the Concentration Block ...


    By Inderscience Publishers

  • Analysis of the impact of intermittent distribution by modelling the network-filling process

    In many countries, users acquire private tanks to reduce their vulnerability to water scarcity. In such conditions, water managers often apply intermittent distribution in order to reduce the water volumes supplied to the users. This practice modifies the hydraulic behaviour of the network and determines competition among users that need to collect enough water resource for their uses. ...


    By IWA Publishing

  • Spatial analysis of Marine Protected Area networks in Europe`s seas

    1.1 Aims and scope of the report This European Environment Agency (EEA) technical report presents an overview of the 2012 spatial distribution of the networks of marine protected areas (MPAs) established in the waters of EU), excluding overseas territories. The report contains a detailed explanation of the methodology and data sets used and the reasoning behind the spatial ...

  • New indices for reliability assessment of water distribution networks

    This paper presents new indices to evaluate the reliability of water distribution networks (WDNs) usable in the design, planning and management of these networks. Since the pressure-driven analysis (PDA) of WDNs produces more accurate results than the demand-driven analysis, the new indices are proposed based on the PDA. In the proposed measures, nodal pressures, nodal available discharges and ...


    By IWA Publishing

  • Component-holistic condition assessment of water distribution networks

    The work presented herein presents an expanded methodology for imprinting the condition of an urban water distribution network (WDN). Even though the majority of past research efforts related to WDNs deal with water mains (WMs), only a small part of the research studies have considered house connections (HCs) in the analysis and very few researchers have examined how the failure of pipe ...


    By IWA Publishing

  • Water distribution network simulation by optimization approaches

    When a fire-flow condition occurs and a nodal demand is excessive or when a pipe breaks, a water distribution system (WDS) may temporarily become deficient and unable to satisfy all nodal demands. Thus, estimation of the influences of failure conditions on the network is needed. A method for analyzing the hydraulic condition of the network in such a situation is proposed. The method, which is ...


    By IWA Publishing

  • Flow modeling and analysis of compound channel in river network with complex floodplains and groynes

    Presented here are flow simulations of a network of natural rivers flanked by one or two large and complex floodplains with impermeable groynes and bridge embankments using one- and quasi-two-dimensional dynamic flow models. The effects of the large floodplain storage capacity, momentum transfer interaction and apparent shear stress at the vertical interface between the main channel and ...


    By IWA Publishing

  • Risk analysis of rich–poor rainfall encounter in inter-basin water transfer projects based on Bayesian networks

    An inter-basin water transfer project is one of the effective ways to resolve the problem of an uneven distribution of water resources. Temporal and spatial variations in rainfall in different basins greatly affect water supply and demand in inter-basin water transfer projects, leading to risks to the operation of the water transfer projects. This paper applies a Bayesian network model to analyze ...


    By IWA Publishing

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