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Table 1

Overflow spill volume reduction achieved by the RTC system for the series of 24 historical rainfall events, based on the number of CSOs regulated and the FCD placement strategy tested

Number of CSOsNumber of FCDsFCD positioning methodStorm events return period (years)
Storm events return period (years)
1/101/71–31/101/71–3Total spill volume reduction compared with baseline network over all rainfall events (%)
Spill volume baseline network (m3)Spill volume reduction compared with baseline network (%)
Static Storage 1,658 5,607 26,370 −3 25 15 16 
GA Method A 100 80 19 33 
GA Method B 100 73 17 30 
16 Static Storage 3,365 11,846 78,946 41 45 20 24 
GA Method B 80 68 21 29 
Number of CSOsNumber of FCDsFCD positioning methodStorm events return period (years)
Storm events return period (years)
1/101/71–31/101/71–3Total spill volume reduction compared with baseline network over all rainfall events (%)
Spill volume baseline network (m3)Spill volume reduction compared with baseline network (%)
Static Storage 1,658 5,607 26,370 −3 25 15 16 
GA Method A 100 80 19 33 
GA Method B 100 73 17 30 
16 Static Storage 3,365 11,846 78,946 41 45 20 24 
GA Method B 80 68 21 29 
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