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A popular South-West coastal town in Victoria has a resident population of 6000 people during the winter months (April - November). During the summer months (December - March), the town population increases to 9,000 people due to holiday makers. The population growth rate was expected to be 1.5% per year for winter population and 2.5% per year for summer population during the 25 years design period.
(i) Calculate the winter and summer population expected at the end of design period.
(ii) Assuming an average daily water demand of 400 L/(person. day) during winter months and 700 L/(person. day) during summer months, calculate the annual water demand on the water supply at the end of the design period.
The settling velocity of alum floc in a sedimentation basin is approximately 0.0014 fps. Calculate the equivalent overflow rate in gpd/ft2. What is the minimum detention time in hours to settle out the alum floc in an ideal basin with a depth of 1..
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