| Assessment on reliability of water quality in water distribution systems |
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| 作者姓名： | 伍悦滨 田海 王龙岩 |
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| 作者单位： | [1]SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150001,China [2]HarbinSaurWaterSupplyCo.Ltd.,Harbin150080,China |
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| 基金项目： | SponsoredbytheScientificResearchFoundationofHarbinInstituteofTechnology(GrantNo .HIT .2 0 0 1 .54) . |
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| 摘 要： | Water leaving the treatment works is usually of a high quality but its properties change during the transportation stage, Increasing awareness of the quality of the service provided within the water industry today and assessing the reliability of the water quality in a distribution system has become a major significance for decision on system operation based on water quality in distribution networks. Using together a water age model, a chlorine decay model and a model of acceptable maximum water age can assess the reliability of the water quality in a distribution system. First, the nodal water age values in a certain complex distribution system can be calculated by the water age model. Then, the acceptable maximum water age value in the distribution system is obtained based on the chlorine decay model. The nodes at which the water age values are below the maximum value are regarded as reliable nodes, Finally, the reliability index on the percentile weighted by the nodal demands reflects the reliability of the water quality in the distribution system. The approach has been applied in a real water distribution network. The contour plot based on the water age values determines a surface of the reliability of the water quality, At any time, this surface is used to locate high water age but poor reliability areas, which identify parts of the network that may be of poor water quality. As a result, the contour water age provides a valuable aid for a straight insight into the water quality in the distribution system.
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| 关 键 词： | 供水系统 水质 水位 水处理 水分配网络 |
Assessment on reliability of water quality in water distribution systems |
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| WU Yue-bin,TIAN Hai,WANG Long-yan.Assessment on reliability of water quality in water distribution systems[J].Journal of Harbin Institute of Technology,2004,11(5):481-484. |
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| Authors: | WU Yue-bin TIAN Hai WANG Long-yan |
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| Affiliation: | 1. School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150001, China
2. Harbin Saur Water Supply Co. Ltd. , Harbin 150080, China |
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| Abstract: | Water leaving the treatment works is usually of a high quality but its properties change during the transportation stage. Increasing awareness of the quality of the service provided within the water industry today and assessing the reliability of the water quality in a distribution system has become a major significance for decision on system operation based on water quality in distribution networks. Using together a water age model, a chlorine decay model and a model of acceptable maximum water age can assess the reliability of the water quality in a distribution system. First, the nodal water age values in a certain complex distribution system can be calculated by the water age model. Then, the acceptable maximum water age value in the distribution system is obtained based on the chlorine decay model. The nodes at which the water age values are below the maximum value are regarded as reliable nodes. Finally, the reliability index on the percentile weighted by the nodal demands reflects the reliability of the water quality in the distribution system. The approach has been applied in a real water distribution network. The contour plot based on the water age values determines a surface of the reliability of the water quality. At any time, this surface is used to locate high water age but poor reliability areas, which identify parts of the network that may be of poor water quality. As a result, the contour water age provides a valuable aid for a straight insight into the water quality in the distribution system. |
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| Keywords: | reliability of water quality reliability index maximum water age contour water age water distribution systems |
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