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Drinking Water Engineering and Science An interactive open-access journal

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© Author(s) 2017. This work is distributed under
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Research article
24 Apr 2017
Review status
A revision of this discussion paper was accepted for the journal Drinking Water Engineering and Science (DWES) and is expected to appear here in due course.
Limitations of Demand- and Pressure-Driven Modeling for Large Deficient Networks
Mathias Braun1, Olivier Piller1, Jochen Deuerlein2, and Iraj Mortazavi3 1IRSTEA, 50 Avenue de Verdun, 33612 Cestas, France
23S Consult GmbH, Albtalstrasse, 76137 Karlsruhe, Germany
3CNAM, EA-7340-M2N-Modelisation Mathematique et Numerique, 75003 Paris, France
Abstract. The calculation of hydraulic state variables for a network is an important task in managing the distribution of potable water. Over the years the mathematical modeling process has been improved by numerous researchers for the utilization in new computer applications and the more realistic modeling of water distribution networks. But, in spite of these continuous advances, there are still a number of physical phenomena that cannot be tackled correctly by current models. This paper will take a closer look on the two modeling paradigms given by demand and pressure driven modeling. The basic equations are introduced and parallels are drawn to the optimization formulations from electrical engineering. These formulations guarantee existence and uniqueness of the solution. One of the central questions in the French and German research project ResiWater is the investigation of the network resilience in case of extreme events or disasters. Under such extraordinary conditions where models are pushed beyond their limits we talk of deficient network models. Examples of deficient networks are given by highly regulated flow, leakage or pipe bursts and cases where pressure falls below the vapor-pressure of water. These examples will be presented and analyzed on the solvability and physical correctness of the solution with respect to demand and pressure driven models.

Citation: Braun, M., Piller, O., Deuerlein, J., and Mortazavi, I.: Limitations of Demand- and Pressure-Driven Modeling for Large Deficient Networks, Drink. Water Eng. Sci. Discuss.,, in review, 2017.
Mathias Braun et al.
Mathias Braun et al.


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