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Improved Loop-Flow Method for Hydraulic Analysis of Water Distribution Systems

Authorized Users Only
2018
Authors
Vasilić, Željko
Stanić, Miloš
Kapelan, Zoran
Ivetić, Damjan
Prodanović, Dušan
Article (Published version)
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Abstract
Different methods have been developed in the past to formulate and solve steady-state hydraulics of a water distribution system (WDS). The most widely used method nowadays is probably the global gradient algorithm (GGA). The loop-flow method (also known as the Q method) represents a viable alternative to GGA, especially when combined with suitably preprocessed network data. The main advantage of the Q method over the GGA is in the smaller number of unknowns to solve for, which is coming from the fact that real WDSs typically have far less loops than nodes. A new loop-flow-type method, relying on the novel triangulation based loops identification algorithm (TRIBAL) that was implemented in the corresponding new hydraulic solver (Q), is presented in this paper (TRIBAL-Q). The new method aims to exploit this advantage, while overcoming key drawbacks of existing Q methods. The performance of the TRIBAL-Q-based solver is compared with the GGA-based solver on four large real networks of diffe...rent complexity and topology. The results obtained demonstrate that, despite requiring an increased number of iterations to converge, the TRIBAL-Q method-based solver is substantially computationally faster, has slightly better numerical stability, and is equally accurate in making predictions when compared with the GGA-based hydraulic solver.

Keywords:
Q method / Loop flow / WDS analysis / Minimal loops / Global gradient algorithm (GGA)
Source:
Journal of Water Resources Planning and Management, 2018, 144, 4
Publisher:
  • American Society of Civil Engineers (ASCE)

DOI: 10.1061/(ASCE)WR.1943-5452.0000922

ISSN: 0733-9496

WoS: 000425621200018

Scopus: 2-s2.0-85042070938
[ Google Scholar ]
1
1
URI
https://grafar.grf.bg.ac.rs/handle/123456789/953
Collections
  • Катедра за геодезију и геоинформатику
  • Катедра за хидротехнику и водно-еколошко инжењерство
Institution/Community
GraFar
TY  - JOUR
AU  - Vasilić, Željko
AU  - Stanić, Miloš
AU  - Kapelan, Zoran
AU  - Ivetić, Damjan
AU  - Prodanović, Dušan
PY  - 2018
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/953
AB  - Different methods have been developed in the past to formulate and solve steady-state hydraulics of a water distribution system (WDS). The most widely used method nowadays is probably the global gradient algorithm (GGA). The loop-flow method (also known as the Q method) represents a viable alternative to GGA, especially when combined with suitably preprocessed network data. The main advantage of the Q method over the GGA is in the smaller number of unknowns to solve for, which is coming from the fact that real WDSs typically have far less loops than nodes. A new loop-flow-type method, relying on the novel triangulation based loops identification algorithm (TRIBAL) that was implemented in the corresponding new hydraulic solver (Q), is presented in this paper (TRIBAL-Q). The new method aims to exploit this advantage, while overcoming key drawbacks of existing Q methods. The performance of the TRIBAL-Q-based solver is compared with the GGA-based solver on four large real networks of different complexity and topology. The results obtained demonstrate that, despite requiring an increased number of iterations to converge, the TRIBAL-Q method-based solver is substantially computationally faster, has slightly better numerical stability, and is equally accurate in making predictions when compared with the GGA-based hydraulic solver.
PB  - American Society of Civil Engineers (ASCE)
T2  - Journal of Water Resources Planning and Management
T1  - Improved Loop-Flow Method for Hydraulic Analysis of Water Distribution Systems
IS  - 4
VL  - 144
DO  - 10.1061/(ASCE)WR.1943-5452.0000922
ER  - 
@article{
author = "Vasilić, Željko and Stanić, Miloš and Kapelan, Zoran and Ivetić, Damjan and Prodanović, Dušan",
year = "2018",
abstract = "Different methods have been developed in the past to formulate and solve steady-state hydraulics of a water distribution system (WDS). The most widely used method nowadays is probably the global gradient algorithm (GGA). The loop-flow method (also known as the Q method) represents a viable alternative to GGA, especially when combined with suitably preprocessed network data. The main advantage of the Q method over the GGA is in the smaller number of unknowns to solve for, which is coming from the fact that real WDSs typically have far less loops than nodes. A new loop-flow-type method, relying on the novel triangulation based loops identification algorithm (TRIBAL) that was implemented in the corresponding new hydraulic solver (Q), is presented in this paper (TRIBAL-Q). The new method aims to exploit this advantage, while overcoming key drawbacks of existing Q methods. The performance of the TRIBAL-Q-based solver is compared with the GGA-based solver on four large real networks of different complexity and topology. The results obtained demonstrate that, despite requiring an increased number of iterations to converge, the TRIBAL-Q method-based solver is substantially computationally faster, has slightly better numerical stability, and is equally accurate in making predictions when compared with the GGA-based hydraulic solver.",
publisher = "American Society of Civil Engineers (ASCE)",
journal = "Journal of Water Resources Planning and Management",
title = "Improved Loop-Flow Method for Hydraulic Analysis of Water Distribution Systems",
number = "4",
volume = "144",
doi = "10.1061/(ASCE)WR.1943-5452.0000922"
}
Vasilić, Ž., Stanić, M., Kapelan, Z., Ivetić, D.,& Prodanović, D.. (2018). Improved Loop-Flow Method for Hydraulic Analysis of Water Distribution Systems. in Journal of Water Resources Planning and Management
American Society of Civil Engineers (ASCE)., 144(4).
https://doi.org/10.1061/(ASCE)WR.1943-5452.0000922
Vasilić Ž, Stanić M, Kapelan Z, Ivetić D, Prodanović D. Improved Loop-Flow Method for Hydraulic Analysis of Water Distribution Systems. in Journal of Water Resources Planning and Management. 2018;144(4).
doi:10.1061/(ASCE)WR.1943-5452.0000922 .
Vasilić, Željko, Stanić, Miloš, Kapelan, Zoran, Ivetić, Damjan, Prodanović, Dušan, "Improved Loop-Flow Method for Hydraulic Analysis of Water Distribution Systems" in Journal of Water Resources Planning and Management, 144, no. 4 (2018),
https://doi.org/10.1061/(ASCE)WR.1943-5452.0000922 . .

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