Analysis of MNF and FAVAD Model for Leakage Characterization by Exploiting Smart-Metered Data: The Case of the Gorino Ferrarese (FE-Italy) District

Marzola, Irene; Alvisi, Stefano; Franchini, Marco

doi:10.3390/w13050643

Cited by 17 publications

(6 citation statements)

References 20 publications

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“…These investigations show that leak areas are not stable but instead change with system pressure, which is the main reason for this discrepancy. Since the geometry, size, or area of the opening may change over time, further research studies [8,[28][29][30][31][32] have discovered that the leak flow via a pipe opening will also depend on these factors. For instance, in Table 1, the N1 exponent for different pipe materials and leak geometry is illustrated.…”

Section: Favad Modelmentioning

confidence: 99%

Model-Based Approach for Leak Detection and Localization in Water Distribution Networks: A Literature Survey

Shabangu,

Hamam,

Jordaan

et al. 2023

JERA

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Water loss poses a significant problem for water utilities and has received a lot of attention. To fulfill the increasing global demand for water, water supply system operations must be streamlined, making leak detection and location crucial. Water utilities have developed a number of techniques over time for finding leaks in water distribution networks (WDNs). These methodologies range from simple visual inspection to the use of hardware systems and now software using models and algorithms. Data from flow or pressure measurements, which are required for the analysis of water networks, is becoming more readily available with the introduction of intelligent sensor devices. Along with the introduction of geographic information systems (GIS) and supervisory control and data acquisition (SCADA) in the water sector, the deployment of model-driven methodologies for leak detection and localization has found extensive use. This paper aims to provide a concise introductory reference for early researchers in the development of a model-based approach for leak detection in WDNs. Thus, a survey of model-based approaches is presented, along with current research trends and applications of model-driven methodologies for leak detection in water supply networks. Several model-driven approaches and research studies for each case are discussed. Some challenges and research gaps are also discussed.

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Section: Favad Modelmentioning

confidence: 99%

Model-Based Approach for Leak Detection and Localization in Water Distribution Networks: A Literature Survey

Shabangu,

Hamam,

Jordaan

et al. 2023

JERA

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“…An important issue in MNF estimation from flow timeseries, is that there are no rigorous methodological specifications for its implementation. For example, depending on the application and the networks' monitoring characteristics, extraction of night flow minima may start (end) at different night (morning) hours, usually ignoring the resolution of the data and the seasonality of the consumption [5,31,[45][46][47][48][49][50][51][52][53]. To bridge this gap, in a recent study, Serafeim et al [42] developed two conceptually different probabilistic approaches for MNF estimation, which are based on statistical metrics, and are suited to minimize noise effects, allowing for more accurate representation of the low flows during night hours, as well as confidence interval estimation of the observed MNFs, making them more suitable for practical applications.…”

Section: Introductionmentioning

confidence: 99%

Probabilistic Minimum Night Flow Estimation in Water Distribution Networks and Comparison with the Water Balance Approach: Large-Scale Application to the City Center of Patras in Western Greece

Serafeim

Kokosalakis

Deidda

et al. 2022

Water

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Quantification of water losses (WL) in water distribution networks (WDNs) is a crucial task towards the development of proper strategies to reduce them. Currently, WL estimation methods rely on semi-empirical assumptions and different implementation strategies that increase the uncertainty of the obtained estimates. In this work, we compare the effectiveness and robustness of two widely applied WL estimation approaches found in the international literature: (a) the water balance, or top-down, approach introduced by the International Water Association (IWA), and (b) the bottom-up or minimum night flow (MNF) approach, based on a recently proposed probabilistic MNF estimation method. In doing so, we use users’ consumption and flow-pressure data from the 4 largest pressure management areas (PMAs) of the WDN of the city of Patras (the third largest city in Greece), which consist of more than 200 km of pipeline, cover the entire city center of Patras, and serve approximately 58,000 consumers. The obtained results show that: (a) when MNF estimation is done in a rigorous statistical setting from high resolution flow-pressure timeseries, and (b) there is sufficient understanding of the consumption types and patterns during day and night hours, the two approaches effectively converge, allowing for more reliable estimation of the individual WL components. In addition, when high resolution flow-pressure timeseries are available at the inlets of PMAs, the suggested version of the bottom-up approach with probabilistic estimation of MNF should be preferred as less sensitive, while allowing for confidence interval estimation of the individual components of water losses and development of proper strategies to reduce them.

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“…(EU-CWC Project, 2017). Moreover, the presence of the leaks involves significant costs for water operators (Marzola I. et al, 2021). Therefore, high financial investment is allocated to reduce the water losses (Al-Bulushi M.M.…”

Section: Introductionmentioning

confidence: 99%

Overview and Recommendations for Analysis of Water Distribution Systems Based on Performance Indicators

Vitan

Hoțupan

Hadarean

et al. 2022

Journal of Applied Engineering Sciences

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The protection of the water sources represents a topic that concerns humanity worldwide. Hence, the decrease of the water losses that occurs in water distribution networks during its overall operational lifetime, is an important issue for water operators and for researchers at theoretical and experimental level. Over the last years progresses have been made on the evaluation and analysis methods in order to eliminate the water losses. Among these methods, the evaluation of the water distribution systems, made on performance indicators by the use of the water balance, is the most current. Thus, the calculated value of each performance indicator and the analysis of these values will lead to the identification of the real problems within the water distribution system. As a result, this analysis has to be the first step in the planning phase of a new project and in the same time, it can serve as a pattern for any water distribution systems in order to decrease the water losses at lower costs.

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Analysis of MNF and FAVAD Model for Leakage Characterization by Exploiting Smart-Metered Data: The Case of the Gorino Ferrarese (FE-Italy) District

Cited by 17 publications

References 20 publications

Model-Based Approach for Leak Detection and Localization in Water Distribution Networks: A Literature Survey

Model-Based Approach for Leak Detection and Localization in Water Distribution Networks: A Literature Survey

Probabilistic Minimum Night Flow Estimation in Water Distribution Networks and Comparison with the Water Balance Approach: Large-Scale Application to the City Center of Patras in Western Greece

Overview and Recommendations for Analysis of Water Distribution Systems Based on Performance Indicators

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