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Groundwater levels

SouthEast Region


SouthEast region water levels hydrograph

*The long term average (LTA) has been calculated statistically, using the long term data record for this hydrograph. The respective drought zones are used as operational triggers, and have been derived using the LTA.

*Drought zone 1 is the LTA in Southeast region.


Rainfall in our Southeast region was well below average in September, at 44% of the LTA. Groundwater levels have continued to decline, at a similar rate to the LTA curve. A continued decline is forecast until mid-Autumn this year. Groundwater levels are expected to remain above drought trigger 1 for the remainder of the year if we experience at least 80% of the LTA rainfall month on month. Under a very low rainfall scenario (60% of LTA or less), predictions indicate that groundwater levels have the potential to dip below drought trigger 1 in late winter. Groundwater levels are likely to peak at a lower level than last winter during the upcoming recharge period, even under a 120% LTA rainfall scenario.

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