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Groundwater levels

East Region

 

Central 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.

 

In our East region, rainfall in June was above average at 123% of LTA. This followed a very dry start to the spring, and SMD remains above average for the time of year. Groundwater levels have continued to decline and are in drought zone 1, although the rate of decline has lessened since May. Under a 60 % rainfall scenario, there is potential for groundwater levels to dip down towards drought zone 2 in late summer. Wetter conditions would produce a gentler recession. Under all rainfall scenarios, it is likely that groundwater levels will remain in drought zone 1 for the next 7 months.

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