Decision Support Tool for Design and Reliability Assessment of Water Distribution Networks - Pattern Recognition for Reliability Assessment of Water Distribution Networks - page 264

Table 9.17 Annual cost structure of selected networks (in millions)

Net nr. Property Pipes % Storage % O&M % Total

1727 Cheapest 3.04 88.68 0.208 6.07 0.180 5.25 3.46

3307 Most reliable 3.59 89.58 0.208 5.19 0.209 5.22 4.00

691 Cheapest 2.69 87.92 0.208 6.80 0.161 5.27 3.06

757 Most reliable 3.36 89.24 0.208 5.53 0.197 5.24 3.76

353 Cheapest 2.69 87.92 0.208 6.80 0.161 5.27 3.06

962 Most reliable 3.38 89.27 0.208 5.50 0.198 5.23 3.78

9.5.4 Future Demand Growth

The final calculation has been done for the layout nr.3307 and nr.962, by predicting the
demand growth of 2% over 15 years, total 32%. The trends of I n , NBI , ADF avg and ADF min are
shown in Figures 9.12 and 9.13, respectively.

1

0.9

0.8

0.7

0.6

In
NBI
ADFavg
ADFmin

0.5

0.4

0.3

0.2

0.1

0

Figure 9.12 Trend of I n , NBI , ADF avg and ADF min for increased demand of layout nr.3307

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

1

0.9

0.8

0.7

0.6

In
NBI
ADFavg
ADFmin

0.5

0.4

0.3

0.2

0.1

0

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

-0.1

-0.2

Figure 9.13 Trend of I n , NBI , ADF avg and ADF min for increased demand of layout nr.962