The Dependence of Water Consumption on the Pressure Conditions and Sensitivity Analysis of the Input Parameters

Tuhovcak, Ladislav; Suchacek, Tomas; Rucka, Jan

doi:10.3390/proceedings2110592

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…Not much literature could be found with measured values for the N1 exponent in relation to water use and pressure. For the water use-pressure relationship, we used Equation (5) with N1 exponent value of 0.15, which has been reported for office buildings in the Czech Republic [26].…”

Section: Pressure Reductionmentioning

confidence: 99%

Cost–Benefit Analysis of Leakage Reduction Methods in Water Supply Networks

Ahopelto

Vahala

2020

Water

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Reducing water loss from water supply systems is often regarded as one of the most important ways to improve the resource efficiency of water supply services. However, the costs and impacts of water loss reduction efforts need to be weighed against the benefits to define the optimal water loss target level. To this end, we conducted a cost–benefit analysis of three investment-based leakage reduction methods: district metering, pressure reduction, and pipe renovations. Furthermore, we conducted uncertainty and sensitivity analysis to determine the most relevant data for leakage analysis and policymaking on a national level. The results indicate that water loss management might not be directly cost-beneficial to utilities operating with moderate leakage levels. Neither leakage percentage nor the Infrastructure Leakage Index (ILI) were suitable for leakage target setting for the Finnish utilities. The costs of investing in district metering or renovations were the most influential factors in the sensitivity analysis, but the results showed that the estimated values were sufficiently accurate for assessing leakage policies.

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Section: Pressure Reductionmentioning

confidence: 99%

Cost–Benefit Analysis of Leakage Reduction Methods in Water Supply Networks

Ahopelto

Vahala

2020

Water

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A Field Experiment Verification of Theoretical Exponent N1 for FAVAD Method in Defining the Relationship of Pressure and Water Losses

Dundović

Tadić

2022

Water

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The current problem of managing water losses in water supply systems relies on engineering predictions of expected outcomes based on pressure manipulations using hydraulic models or other computational methods. The objective of this experiment was to conduct a field test to validate the theoretical N1 exponent of the fixed and variable area discharges (FAVAD) method. By knowing the pipe material and measuring the pressure and minimum night flow (MNF), the N1 exponent can be defined and compared to recommendations in the literature. Field measurements and experiments were performed in a small settlement in Croatia consisting of 278 house connections and 7.4 km of PVC material pipe network. Pressure manipulation was performed on a pressure-reducing valve (PRV). The resulting value of N1 = 1.76 from the experiment agrees with the literature graphs, which indicate a value of N1 between 1.5 and 2.0. Considering the difference between the studied values and the theoretically calculated MNF of 4%, it can be concluded that the implementation of the presented methodology to determine the N1 exponent can be used in practice. This type of field testing is important because such tests are difficult to perform due to the extensive pressure manipulations during the tests, which can affect the consumers and cause disturbances in the water distribution.

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The Dependence of Water Consumption on the Pressure Conditions and Sensitivity Analysis of the Input Parameters

Cited by 2 publications

References 8 publications

Cost–Benefit Analysis of Leakage Reduction Methods in Water Supply Networks

Cost–Benefit Analysis of Leakage Reduction Methods in Water Supply Networks

A Field Experiment Verification of Theoretical Exponent N1 for FAVAD Method in Defining the Relationship of Pressure and Water Losses

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