Environmental Engineering Reference
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01-151
02-151
03-151
04-151
05-151
06-151
07-151
08-151
09-151
10-151
11-151
12-151
13-151
14-151
15-151
Figure 6.23 Configurations of the network cluster NGT151 (151 nodes, 217-246 links)
The source has been located in the middle area, and all the pipe diameters have been set at
100 mm; this much smaller diameter is chosen to test the correlations with increased
resistance of the pipes, compared to the previous sets. To avoid low pressures, the demand
multipliers have been adjusted by NDT to satisfy the minimum pressure condition of 20
mwc, used also for PDD simulations and calculations of ADF avg and NBI , like in the previous
simulation runs with fixed diameters. This has resulted in the demand ranges between (a) 5.8
l/s (in network 04-50 ) and 20.2 l/s (in network 09-50 ), for the cluster of networks with 50
nodes, (b) 6.1 l/s (in network 08-151 ) and 20.8 l/s (in network 04-151 ), for the cluster of
networks with 151 nodes, and (c) 7.4 l/s (in network 06-200 ) and 20.0 l/s (in network 13-
200 ), for the cluster of networks with 200 nodes. The baseline nodal demands and elevations
have been randomised by NGT per cluster of networks, the nodal elevations resembling
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