The bar chart illustrates the water levels in reservoirs across six Australian cities in October 2009 and October 2010, expressed as a percentage of their maximum capacity. While some reservoirs experienced an increase in water levels, others saw a decline, with notable variations between cities.
Overall, Sydney, Brisbane, and Canberra witnessed a rise in water levels, whereas Darwin and Melbourne saw a decrease. Perth’s water level remained unchanged over the period. The most significant increase occurred in Canberra, while the sharpest decline was observed in Darwin.
In terms of declining water levels, Darwin’s reservoir dropped from approximately 45% in 2009 to 28% in 2010, making it the most notable decrease among the six reservoirs. Similarly, Melbourne’s reservoir saw a reduction, but in contrast, its water level increased from around 22% to 38%.
On the other hand, Sydney’s reservoir showed an improvement, rising from about 72% to 82%, while Brisbane’s reservoir also experienced an increase, going from nearly 40% to 61%. The most dramatic growth was seen in Canberra, where the water level surged from 72% to 98%, nearing full capacity. Meanwhile, Perth’s reservoir remained stable at approximately 53% over both years.