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Keywords = FAVAD equation

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15 pages, 5074 KB  
Article
Analysis of MNF and FAVAD Model for Leakage Characterization by Exploiting Smart-Metered Data: The Case of the Gorino Ferrarese (FE-Italy) District
by Irene Marzola, Stefano Alvisi and Marco Franchini
Water 2021, 13(5), 643; https://doi.org/10.3390/w13050643 - 27 Feb 2021
Cited by 23 | Viewed by 5327
Abstract
Leakages in water distribution systems have great economic and environmental impacts and are a major issue for water utilities. In this work, the water balance and the Minimum Night Flow (MNF) method for evaluating the amount of water loss, as well as the [...] Read more.
Leakages in water distribution systems have great economic and environmental impacts and are a major issue for water utilities. In this work, the water balance and the Minimum Night Flow (MNF) method for evaluating the amount of water loss, as well as the power and Fixed and Variable Area Discharge (FAVAD) equations for analyzing the relationship between leakage and pressure, were applied to a fully monitored District Metered Area (DMA) located in Gorino Ferrarese (FE, Italy). Time series of (a) the water consumption of each user, (b) the DMA inflow, and (c) the pressure at the DMA inlet point were monitored with a 5 min time step. The results of an analysis carried out by exploiting the collected time series highlighted that: (a) The application of the MNF method based on literature values can lead to significant inaccuracies in the presence of users with irregular consumption, and (b) the estimation of the parameters of the power and FAVAD equations is highly affected by the amounts and types of observed data used. Full article
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8 pages, 636 KB  
Proceeding Paper
Minimum Night Flow Analysis and Application of the Fixed and Variable Area Discharges Model for Characterizing Leakage in the Gorino Ferrarese (FE-Italy) District
by Irene Marzola, Stefano Alvisi and Marco Franchini
Environ. Sci. Proc. 2020, 2(1), 8; https://doi.org/10.3390/environsciproc2020002008 - 9 Aug 2020
Cited by 3 | Viewed by 2569
Abstract
Leakage in water distribution systems is an important issue and of major interest for water utilities. In this study, the Minimum Night Flow (MNF) method to quantify the amount of water lost and the equations representing the relationship between pressure and leakage in [...] Read more.
Leakage in water distribution systems is an important issue and of major interest for water utilities. In this study, the Minimum Night Flow (MNF) method to quantify the amount of water lost and the equations representing the relationship between pressure and leakage in power and FAVAD (Fixed and Variable Area Discharge) forms were applied to a District Metered Area (DMA) located in Gorino Ferrarese (FE, Italy) equipped with smart meters. The analysis carried out by exploiting the collected time series of user water consumption, DMA inflow, and pressure highlighted that: (a) the MNF method can lead to significant inaccuracy in leakage estimation in the presence of users with irregular consumptions, when based on literature values, and (b) the estimation of the parameters of the power and FAVAD equation is highly affected by the number and types of observed data used. Full article
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9 pages, 660 KB  
Proceeding Paper
Pre-Localization Approach of Leaks on a Water Distribution Network by Optimization of the Hydraulic Model Using an Evolutionary Algorithm
by Karima Sebbagh, Abdelhamid Safri and Moula Zabot
Proceedings 2018, 2(11), 588; https://doi.org/10.3390/proceedings2110588 - 3 Aug 2018
Cited by 5 | Viewed by 2757
Abstract
The sustainable management of water distribution networks is a crucial challenge especially in emerging countries. The distribution networks have very low efficiency with very high levels of leaks. Locating and prioritizing of water leakage areas becomes a main concern for public services, to [...] Read more.
The sustainable management of water distribution networks is a crucial challenge especially in emerging countries. The distribution networks have very low efficiency with very high levels of leaks. Locating and prioritizing of water leakage areas becomes a main concern for public services, to optimize the use of resources and improve constancy of supply. A decision support approach was proposed to locate areas with higher leakage rate. It is based on the resolution of the FAVAD equation (Fixed And Variable Area Discharge). The determination of FAVAD parameters enables to simulate the quantities and the location of the leaks, through the use of genetic algorithms coupled with hydraulic modeling and the geographical information system (GIS). Full article
(This article belongs to the Proceedings of EWaS3 2018)
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9 pages, 279 KB  
Proceeding Paper
The Dependence of Water Consumption on the Pressure Conditions and Sensitivity Analysis of the Input Parameters
by Ladislav Tuhovcak, Tomas Suchacek and Jan Rucka
Proceedings 2018, 2(11), 592; https://doi.org/10.3390/proceedings2110592 - 2 Aug 2018
Cited by 2 | Viewed by 1970
Abstract
The paper presents results and sensitivity analysis of the results of a real detailed study focused on changes in water consumption and its unevenness with changing pressure conditions in a particular observed office building. The dependence of water consumption on pressure is expressed [...] Read more.
The paper presents results and sensitivity analysis of the results of a real detailed study focused on changes in water consumption and its unevenness with changing pressure conditions in a particular observed office building. The dependence of water consumption on pressure is expressed using the FAVAD equation using the N3 coefficient. Parameters for sensitivity analysis are number of workers in the building, pulse value from water meter and length of time step for expressing unevenness of water consumption during the day. Full article
(This article belongs to the Proceedings of EWaS3 2018)
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