Development and Application of Advanced-Pressure Driven Analysis Model Considering Limited Reservoir

In the analysis of drinking Water Distribution Networks (WDNs), performance indices are widely used tools for obtaining synthetic information about the WDN operating regime (pressures and flows). This paper presents applications of a series of local surplus indices that act in a new mathematical framework. This framework allows reworking many well-known performance and energetic indices and simultaneously allowing analysis of specific aspects of the WDN. The analyses are carried out using different resolutive hydraulic approaches: the Demand-Driven Analysis (DDA) and the Pressure-Driven Analysis (PDA), typical of software such as EPANET and WaterNetGen. The authors analyse the hypotheses necessary for the application of these models, and how these influence the results of both the hydraulic modeling and the resilience indices assessment. In particular, two resilience indices are reformulated through the new local surplus indices and all of them are then simulated in different conditions for a water network known in literature as the Kang and Lansey WDN. The solving model assumption effects are deepen, reporting graphical and numerical results for different consumption scenarios and the different hydraulic approaches used.

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Performance Management of Demand and Pressure Driven Analysis in a Monitored Water Distribution Network

Lecture Notes in Computer Science - Numerical Computations: Theory and Algorithms ◽

10.1007/978-3-030-39081-5_43 ◽

2020 ◽

pp. 506-516

Author(s):

Marco Amos Bonora ◽

Manuela Carini ◽

Gilda Capano ◽

Rocco Cotrona ◽

Daniela Pantusa ◽

...

Keyword(s):

Performance Management ◽

Water Distribution ◽

Distribution Network ◽

Water Distribution Network ◽

Pressure Driven Analysis ◽

Pressure Driven

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Uncertainty quantification of pressure-driven analysis for water distribution network modeling

Water Science & Technology Water Supply ◽

10.2166/ws.2015.168 ◽

2015 ◽

Vol 16 (3) ◽

pp. 599-610 ◽

Cited By ~ 8

Author(s):

Ho Min Lee ◽

Do Guen Yoo ◽

Doosun Kang ◽

Hwandon Jun ◽

Joong Hoon Kim

Keyword(s):

Negative Pressure ◽

Water Distribution ◽

Real Life ◽

Water Distribution Network ◽

Distribution Networks ◽

Operating Conditions ◽

Service Reliability ◽

High Degree ◽

Pressure Driven Analysis ◽

Pressure Driven

The hydraulic analysis of water distribution networks (WDNs) is divided into two approaches: namely, a demand-driven analysis (DDA) and a pressure-driven analysis (PDA). In the DDA, the basic assumption is that the nodal demand is fully supplied irrespective of the nodal pressure, which is mainly suitable for normal operating conditions. However, in abnormal conditions, such as pipe failures or unexpected increase in demand, the DDA approach may cause unrealistic results, such as negative pressure. To address the shortcomings of DDA, PDA has been considered in a number of studies. For PDA, however, the head-outflow relation (HOR) should be given, which is known to contain a high degree of uncertainty. Here, the DDA-based simulator, EPANET2 was modified to develop a PDA model simulating pressure deficient conditions and a Monte Carlo simulation (MCS) was performed to consider the quantitative uncertainty in HOR. The developed PDA model was applied to two networks (a well-known benchmark system and a real-life WDN) and the results showed that the proposed model is superior to other reported models when dealing with negative pressure under abnormal conditions. In addition, the MCS-based sensitivity analysis presents the ranges of pressure and available discharge, quantifying service reliability of water networks.

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