Diagnostics of Regular Performance of Water Distribution Networks and its Relation to the Network Reliability - Pattern Recognition for Reliability Assessment of Water Distribution Networks - page 183

uniformly for all the pipes and the change of the reliability measures was monitored against
the increase of the total network volume. The selection of results is shown in Figures 7.7 to
7.9.

1 1

0.9 0.9

0.8 0.8

0.7 0.7

0.6 0.6

NPI
PBI
NRT(hrs)
ADFavg
NBI
In

NPI
PBI
NRT(hrs)
ADFavg
NBI
In

0.5 0.5

0.4 0.4

0.3 0.3

0.2 0.2

0.1 0.1

0 0

2000 2200 2400 2600 2800 3000 3200 3400 3600 800 850 900 950 1000 1050 1100 1150 1200 1250 1300

Vtot (m3) Vtot (m3)

Figure 7.7 Reliability measures for networks sn73 (left) and O20sn73 (right) for D increase of 32%

1 1

0.9 0.9

0.8 0.8

0.7 0.7

0.6 0.6

NPI
PBI
NRT(hrs)
ADFavg
NBI
In

NPI
PBI
NRT(hrs)
ADFavg
NBI
In

0.5 0.5

0.4 0.4

0.3 0.3

0.2 0.2

0.1 0.1

0 0

2200 2400 2600 2800 3000 3200 3400 3600 3800 2600 2800 3000 3200 3400 3600 3800 4000 4200 4400 4600

Vtot (m3) Vtot (m3)

Figure 7.8 Reliability measures for networks sn0179 (left) and sn0199 (right) for D increase of 32%

1 1

0.9 0.9

0.8 0.8

0.7 0.7

0.6 0.6

NPI
PBI
NRT(w)
ADFavg
NBI
In

NPI
PBI
NRT(w)
ADFavg
NBI
In

0.5 0.5

0.4 0.4

0.3 0.3

0.2 0.2

0.1 0.1

0 0

600 650 700 750 800 850 900 950 1000 1050 1100 1900 2100 2300 2500 2700 2900 3100 3300 3500

Vtot (m3) Vtot (m3)

Figure 7.9 Reliability measures for networks ngt01-50 (left) and ngt01-151 (right) for D increase of 32%

The figures show the values of the reliability measures for enlarged network capacity that is
described by the total pipe volume. Good correlations are visible in almost all the cases and
they look specifically good between the values of NPI and I n .