Uploaded on 2016-11-08 by Jordan Ross Currie

Today I will be looking at three stocks and flows that impact the city of Melbourne, Australia. 1.Water 2.Energy 3.Population Water In a hot arid land that suffers from bush fires and droughts water stock is always a vital consideration for the city. Although improving in recent years to level off between 65% - 80% (see figures 1 & 2) reliably for the last four years (the change in level corresponding to the seasons) You can see that during an extended drought period the water levels got as low as 25% in the summer of 2009. The recovery from this low point has been aided in the implementation of two water treatment plants that recycle grey water. Changing the flow and redirecting it back into circulation, increasing stock. 125 Billion litres anally is used to power Melbourne's coal plants. This accounts or 1/3 of the states annual water consumption. Power As a modern city Melbourne has a high energy consumption. The vast majority of this energy is produced by the coal power plants near Morwell totalling 73% of the states production (See figure 3) Natural gas comes in as the second highest option at 13% with wind, roof top solar, solar plant and bio-energy all bellow 5% Population Melbournes rapidly increasing population is expected to reach 5.20 Million this year. (see figure 4 for earlier growth chart) As a multicultural city it is no surprise to find that as of 2013 38% of its inhabitants were believed to have moved into the city from overseas. With the highest Italian and Greek populations outside their native homelands. This flow of people moving into the city has caused a denser city population (440 per square kilometre) , but also a quite large urban sprawl with the city spilling out into is inner suburbs. This urban sprawl will prove to be one of the cities major problems in the coming years as commute times, agriculture, public transport and infrastructure will all have to be adapted for the increased population.