The bar chart compares the percentage of water levels in reservoirs across six Australian cities in October 2009 and October 2010.
Overall, most cities experienced an increase in water levels over the period shown, with Canberra and Perth recording the most notable rises. In contrast, Darwin was the only city to see a sharp decline. Brisbane was the only city with no significant change.
In detail, Brisbane remained stable between the two years, while Sydney rose slightly before falling to second place. Similarly, Canberra experienced a more marked increase and eventually overtook Sydney to become the city with the highest water level in 2010.
In contrast, Darwin witnessed a dramatic drop, nearly halving in percentage and falling to the lowest rank among the six cities. Meanwhile, Melbourne almost doubled its previous figure, surpassing Darwin in 2010. Perth demonstrated a similar upward trend but with even more substantial data, overtaking both Darwin and Brisbane to rank third.