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a) A community had a population of 200,000 in 1995 and it is expected that this

ID: 1821402 • Letter: A

Question

a)      A community had a population of 200,000 in 1995 and it is expected that this will increase to 260,000 by 2010. The water treatment capacity in 1995 was 165 ML/day. A survey showed that the average per capita water use rate was 700 L/(person.day). Estimate the community’s water requirements in 2010 assuming

i)        No change in use rate, and

ii)       A reduced rate of 600 L/(person.day).

iii)      Will expanded treatment facility be needed by 2010 for condition (i)? For condition (ii)?

Explanation / Answer

i) The community will need to treat 182,000,000 liters of water per day, which is 182 mL. ii) WIth a reduced rate of 600 l per person, it will need to produce 156,000,000 liters or 156 mL per day. iii) An expanded treatment facility will be needed for condition i, but not for condition ii.