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Type: Journal article
Title: On the choice of the demand and hydraulic modeling approach to WDN real-time simulation
Author: Creaco, E.
Pezzinga, G.
Savic, D.
Citation: Water Resources Research, 2017; 53(7):6159-6177
Publisher: American Geophysical Union; Wiley
Issue Date: 2017
ISSN: 0043-1397
Statement of
Enrico Creaco, Giuseppe Pezzinga and Dragan Savic
Abstract: This paper aims to analyze two demand modeling approaches, i.e., top‐down deterministic (TDA) and bottom‐up stochastic (BUA), with particular reference to their impact on the hydraulic modeling of water distribution networks (WDNs). In the applications, the hydraulic modeling is carried out through the extended period simulation (EPS) and unsteady flow modeling (UFM). Taking as benchmark the modeling conditions that are closest to the WDN's real operation (UFM + BUA), the analysis showed that the traditional use of EPS + TDA produces large pressure head and water discharge errors, which can be attenuated only when large temporal steps (up to 1 h in the case study) are used inside EPS. The use of EPS + BUA always yields better results. Indeed, EPS + BUA already gives a good approximation of the WDN's real operation when intermediate temporal steps (larger than 2 min in the case study) are used for the simulation. The trade‐off between consistency of results and computational burden makes EPS + BUA the most suitable tool for real‐time WDN simulation, while benefitting from data acquired through smart meters for the parameterization of demand generation models.
Keywords: Unsteady flow modelling; extended period simulation; water demand; demand pulses; water distribution networks
Rights: © 2017. American Geophysical Union. All Rights Reserved.
DOI: 10.1002/2016WR020104
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