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    Hydraulic Simulation Techniques for Water Distribution Networks to Treat Pressure Deficient Conditions

    Source: Journal of Water Resources Planning and Management:;2016:;Volume ( 142 ):;issue: 004
    Author:
    Ho Min Lee
    ,
    Do Guen Yoo
    ,
    Joong Hoon Kim
    ,
    Doosun Kang
    DOI: 10.1061/(ASCE)WR.1943-5452.0000624
    Publisher: American Society of Civil Engineers
    Abstract: Hydraulic analysis schemes for water distribution networks can be divided into demand-driven analysis (DDA) and pressure-driven analysis (PDA) according to the ways of calculating available outflow at nodes based on the assumption of nodal withdrawal estimation. Gradient algorithm-based numerical analysis schemes are generally used for these two types of hydraulic analysis. However, in abnormal conditions where hydraulic conditions rapidly change due to pipe damages or sudden increases in demands, the numerical solutions often derive unrealistic results that could lead to decision-making errors. In this study, the problems that may occur in hydraulic analysis of abnormal conditions were identified through sample cases using DDA and PDA models; then, the modification techniques resolving the simulation problems, the negative pressure in DDA and the total head reverse in PDA, were suggested. The proposed methods were verified by applying them to sample case study simulations. The application results reveal that the proposed approaches derive more realistic results under abnormal conditions, while the existing DDA and PDA tools produce unacceptable results, such as negative pressure and total head reverse occurrence. The scheme is further investigated for water network reliability evaluations and realistic ranges of demand supply under abnormal conditions were obtained.
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      Hydraulic Simulation Techniques for Water Distribution Networks to Treat Pressure Deficient Conditions

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4244858
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    • Journal of Water Resources Planning and Management

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    contributor authorHo Min Lee
    contributor authorDo Guen Yoo
    contributor authorJoong Hoon Kim
    contributor authorDoosun Kang
    date accessioned2017-12-30T13:02:20Z
    date available2017-12-30T13:02:20Z
    date issued2016
    identifier other%28ASCE%29WR.1943-5452.0000624.pdf
    identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4244858
    description abstractHydraulic analysis schemes for water distribution networks can be divided into demand-driven analysis (DDA) and pressure-driven analysis (PDA) according to the ways of calculating available outflow at nodes based on the assumption of nodal withdrawal estimation. Gradient algorithm-based numerical analysis schemes are generally used for these two types of hydraulic analysis. However, in abnormal conditions where hydraulic conditions rapidly change due to pipe damages or sudden increases in demands, the numerical solutions often derive unrealistic results that could lead to decision-making errors. In this study, the problems that may occur in hydraulic analysis of abnormal conditions were identified through sample cases using DDA and PDA models; then, the modification techniques resolving the simulation problems, the negative pressure in DDA and the total head reverse in PDA, were suggested. The proposed methods were verified by applying them to sample case study simulations. The application results reveal that the proposed approaches derive more realistic results under abnormal conditions, while the existing DDA and PDA tools produce unacceptable results, such as negative pressure and total head reverse occurrence. The scheme is further investigated for water network reliability evaluations and realistic ranges of demand supply under abnormal conditions were obtained.
    publisherAmerican Society of Civil Engineers
    titleHydraulic Simulation Techniques for Water Distribution Networks to Treat Pressure Deficient Conditions
    typeJournal Paper
    journal volume142
    journal issue4
    journal titleJournal of Water Resources Planning and Management
    identifier doi10.1061/(ASCE)WR.1943-5452.0000624
    page06015003
    treeJournal of Water Resources Planning and Management:;2016:;Volume ( 142 ):;issue: 004
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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