Efficient Hydraulic State Estimation Technique Using Reduced Models of Urban Water Networks
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Whittle_Efficient Hydraulic.pdf
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Author(s)
Preis, Ami
Whittle, Andrew
Ostfeld, Avi
Perelman, Lina
Date Issued
July 2011
Journal
Journal of Water Resources Planning and Management
Publisher
American Society of Civil Engineers
Citation
Preis, Ami et al. “Efficient Hydraulic State Estimation Technique Using Reduced Models of Urban Water Networks.” Journal of Water Resources Planning and Management 137.4 (2011): 343.
Version
Author's final manuscript
Abstract
This paper describes and demonstrates an efficient method for online hydraulic state estimation in urban water networks. The proposed method employs an online predictor-corrector (PC) procedure for forecasting future water demands. A statistical data-driven algorithm (M5 Model-Trees algorithm) is applied to estimate future water demands, and an evolutionary optimization technique (genetic algorithms) is used to correct these predictions with online monitoring data. The calibration problem is solved using a modified least-squares (LS) fit method (Huber function) in which the objective function is the minimization of the residuals between predicted and measured pressure at several system locations, with the decision variables being the hourly variations in water demands. To meet the computational efficiency requirements of real-time hydraulic state estimation for prototype urban networks that typically comprise tens of thousands of links and nodes, a reduced model is introduced using a water system–aggregation technique. The reduced model achieves a high-fidelity representation for the hydraulic performance of the complete network, but greatly simplifies the computation of the PC loop and facilitates the implementation of the online model. The proposed methodology is demonstrated on a prototypical municipal water-distribution system.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
Singapore-MIT Alliance in Research and Technology (SMART)
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Creative Commons Attribution-Noncommercial-Share Alike 3.0
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DOI of Published Version
https://doi.org/10.1061/(ASCE)WR.1943-5452.0000113
