When the total diversion for Irrigator 1 is combined with that for Irrigators 2 and 3 in the 3 objective
scenario, it can be seen from Figure 3(a) that a similar outcome is obtained compared with that of the 2
objective scenario. However, there are some differences for higher environmental scores, suggesting that
maximising diversions for Irrigator 1 separately can result in lower total diversions for all irrigators at the
same environmental score. It is also possible that these differences are a result of insufficient solution
convergence. The trade-off between all 3 objectives can be seen in Figure 3(b), where high environmental
scores combined with high Irrigator 1 diversions are associated with lower diversions for Irrigators 2 and 3.