Figure 1: Flow duration curves for the Yaldara gauging station data (left) and the Penrice gauging station (right) showing the low flow thresholds identified for the two gauging stations (red lines).

The flow rate for Lyndoch Creek was set at 0.22 ML per day as it has similar area and rainfall as Jacob Creek. The flow rate for Duck Ponds was set at 0.1 ML per day in line with Upper Flaxman Valley which is of comparable size. The flow rate for Stone Chimney Creek was set at 0.05 ML per day as the flow rate established by portioning was below the zero flow threshold established.

In general there was a good distribution of the number of days per low flow season that the flow exceeded the threshold with a clear distinction between the modelled no-dams scenario and the modelled current scenario (Figure 3).