Page 166 - Water Loss Control

144 Cha pte r T e n

Number
of Assessed Average %
Pressure Initial Reduction Average % Mains
Water Managed Maximum in Reduction (M) or
Utility or Sectors Pressure Maximum in New Services
Country System in Study (m) Pressure Breaks (S)
Brisbane 1 100 35% 28% M,S
60% M
Australia Gold Coast 10 60–90 50%
70% S
Yarra Valley 4 100 30% 28% M
Bahamas New 7 39 34% 40% M,S
Providence

Bosnia 59% M
Gracanica 3 50 20%
Herzegovin 72% S
58% M
Caesb 2 70 33%
24% S
Sabesp ROP 1 40 30% 38% M
80% M
Sabesp MO 1 58 65%
29% S
Brazil 64% M
Sabesp MS 1 23 30%
64% S
50% M
SANASA 1 50 70%
50% S
30% M
Sanepar 7 45 30%
70% S
23% M
Canada Halifax 1 56 18%
23% S
50% M
Armenia 25 100 33%
50% S
Colombia
Palmira 5 80 75% 94% M,S
Bogotá 2 55 30% 31% S
45% M
Cyprus Lemesos 7 52.5 32%
40% S

TABLE 10.10 The Influence of Pressure Management on New Break Frequency from 112 Systems in
10 Countries