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Groundwater levels

SouthEast 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.

*Drought zone 1 is the LTA in Southeast region.


Rainfall in May was 34% of LTA in Southeast region, which followed on from a dry March and April. As a result, groundwater levels declined through the month at a slightly steeper rate than the LTA, although they remain above average for the time of year. Forecasts suggest that groundwater levels will likely continue to decline through the summer. Under an average rainfall scenario (100% of LTA), levels are likely to reach just above and track the LTA curve this year. Under a low rainfall scenario (continued 60% LTA rainfall) they may cross into drought zone 1 in late summer.

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