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Table 3

Leakage level in the pilot region according to field data

ComponentsSymbolValueUnit
System pressure before pressure management AZNP91 
System pressure after pressure management AZNP31 
Night–Day Factor (NDF) before pressure management NDF0 22.5 Hours/day 
Night–Day Factor (NDF) after pressure management NDF1 23.8 Hours/day 
Total leakage level before pressure management L0 6.67 l/s 
Total leakage level after pressure management L1 3.01 l/s 
Change in total leakage level ΔL 3.66 l/s 
Rate of change in total leakage level ΔL 54.9 
Recoverable leak level before pressure management Potential L0 4.29 l/s 
Recoverable leak level after pressure management Potential L1 2.45 l/s 
Change in recoverable leakage level ΔL(Potential) 1.84 l/s 
Rate of change in recoverable leakage level ΔL(Potential) 42.9 
Water saved by total leakage level (daily)  78.44 m3 
Water saved by total leakage level (monthly)  2,353 m3 
Water saved by total leakage level (annual)  28,629 m3 
Water saved by recoverable leakage level (daily)  38.2 m3 
Water saved by recoverable leakage level (monthly)  1,146 m3 
Water sved by recoverable leakage level (annual)  13,948 m3 
ComponentsSymbolValueUnit
System pressure before pressure management AZNP91 
System pressure after pressure management AZNP31 
Night–Day Factor (NDF) before pressure management NDF0 22.5 Hours/day 
Night–Day Factor (NDF) after pressure management NDF1 23.8 Hours/day 
Total leakage level before pressure management L0 6.67 l/s 
Total leakage level after pressure management L1 3.01 l/s 
Change in total leakage level ΔL 3.66 l/s 
Rate of change in total leakage level ΔL 54.9 
Recoverable leak level before pressure management Potential L0 4.29 l/s 
Recoverable leak level after pressure management Potential L1 2.45 l/s 
Change in recoverable leakage level ΔL(Potential) 1.84 l/s 
Rate of change in recoverable leakage level ΔL(Potential) 42.9 
Water saved by total leakage level (daily)  78.44 m3 
Water saved by total leakage level (monthly)  2,353 m3 
Water saved by total leakage level (annual)  28,629 m3 
Water saved by recoverable leakage level (daily)  38.2 m3 
Water saved by recoverable leakage level (monthly)  1,146 m3 
Water sved by recoverable leakage level (annual)  13,948 m3 
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