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Does Darwin’s varying rainfall impact on our water supply?

The Darwin region enjoys significant amounts of rain in the wet season, however we are also subject to climatic and rainfall variability just like anywhere else in Australia. The rainfall variability strongly affects water security in the Darwin region. As an example, in 2010-11 and 2011-12, we experienced two years with above average rainfall in the Darwin region, but in the 2012-13 wet season brought below average rainfall. For 12 years, between 1984 and 1996 the Darwin region experienced a significant series of poor wet seasons, equivalent to drought conditions.
All we need is a few years with lower than average rainfall again and we could run out of water from our current sources, especially as annual water use in the Darwin region continues to be high.