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Groundwater levels

East Region

 

East 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.

 

Rainfall in our East region was below average in September, at 59% of the LTA. Groundwater levels have continued to decline through the month at a similar rate to the LTA. Despite this, levels remain above average for the time of year. Predictions indicate a range of potential scenarios through October that vary with the rainfall pattern. The rate of decline is predicted to lessen during October if rainfall is 60 or 80 % of the LTA, with potential for groundwater level recovery under wetter scenarios. If we experience more than 80% of LTA rainfall, groundwater levels are likely to remain above drought trigger 1 for the remainder of the year and through the upcoming recharge period. A low rainfall scenario (60% of LTA or less) could see levels drop below the LTA curve, and track between that and drought trigger 1 through the upcoming recharge period.

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