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https://hdl.handle.net/2440/111934
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Type: | Journal article |
Title: | Evaluating water demand shortfalls in segment analysis |
Author: | Creaco, E. Franchini, M. Alvisi, S. |
Citation: | Water Resources Management, 2012; 26(8):2301-2321 |
Publisher: | Springer |
Issue Date: | 2012 |
ISSN: | 0920-4741 1573-1650 |
Statement of Responsibility: | E. Creaco, M. Franchini, S. Alvisi |
Abstract: | In this paper, two procedures for assessing water demand shortfalls following segment isolation are compared. The first (topological) procedure is based on a simple topological network analysis, and identifies the water demand shortfall as the water demand (under normal operational conditions) relative to the directly and/or indirectly isolated segment(s). The second (hydraulic) procedure is based on a pressure-driven hydraulic simulation of the network after segment isolation. Each of the two procedures was applied to two case studies, and the reliability (expressed in terms of maximum D max and weighted average D¯¯¯¯ water demand shortfall) and economic burden (expressed in terms of number N val or cost C val of installed valves) of the resulting isolation valve system solution were compared. As a whole, the results show that network analysis and redesign are affected by the choice of the global variables (D max or D¯¯¯¯) used to characterize the demand shortfalls in network segments. Analysis of the case studies is followed by a discussion of the rationale behind the choice between the two procedures, which needs to balance accurate demand shortfall characterization with limited computation times, particularly in the multi-objective design stage. |
Keywords: | Valves; water distribution systems; multi-objective algorithm; system reliability; pressure-driven |
Rights: | © Springer Science+Business Media B.V. 2012 |
DOI: | 10.1007/s11269-012-0018-0 |
Published version: | http://dx.doi.org/10.1007/s11269-012-0018-0 |
Appears in Collections: | Aurora harvest 8 Civil and Environmental Engineering publications |
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