Figure : example years of cumulative flow from April
1st and the identified 500ML threshold identified for
the Yaldara Gauging station (Barossa Valley Gorge).
As for the low flow threshold assessment, the value of Lyndoch Creek was
based on Jacob Creek and set to 95 ML. Duckponds Creek was initially set
to 95 ML in line with upper Flaxman Valley, however, this value was
deemed to be too high with the majority of years not ‘breaking’. A lower
value of 70 ML produced more sensible results. Based on the thresholds
reported in Table 3, the date of the break of season was identified for
each year and the number of days between the break of season and the
first of April calculated for each of the zones (Figure 3). While the
data showed great variability in the delay in the break of season, there
is a clear trend of increasing delay, especially since the end of the
Millennium Drought.