The bar chart compares the changes in the levels of water in reservoirs across six Australian urban areas between October 2009 and the same month in 2010.
Overall, the water level in Darwin decreased considerably over the period in question, whereas the reverse was true in the cases of other cities, with the exception of Brisbane, where no change was recorded. (MAIN TREND) It is also noteworthy that Sydney and Canberra showed staggeringly higher percentage of water levels in reservoirs throughout as opposed to other cities listed. (KEY FEATURE)
In October 2009, both Sydney and Canberra had more water at their disposal than any city listed, at around 78%. By October 2010, the disparity in water levels between both metropolitans had become more pronounced, with the figure in the former increasing tangibly to 80% and that of the latter hitting a peak of around 100%.
Similar increasing trends in water levels were observed in Melbourne and Perth, with approximately 40% in the latter city, double higher than the figure in the former (about 20%). In the same month in 2010, water levels in Perth increased significantly higher than those in Melbourne, with respective figures of roughly 70% and 40%.
In contrast, Darwin experienced a noticeable fall in water levels in reservoirs, almost halving to the end of the period from nearly 45% at the beginning. Lastly, Brisbane, also, bucked the trend, with no change seen throughout, remaining static at just below 60%.