For the community described in Problem, assume that the treatment plant capacity in 2000 was 35 mgd. If the water use rate in 2015 is 140 gpcd, will expanded treatment facilities be needed by 2015? In about what year would they be needed if so? What reduction in water use rate would be needed to delay the need for new facilities until 2015? Is a reduction of this magnitude attainable?
Problem:
A community had a population of 200,000 in 2000 and it is expected that this will increase to 260,000 by 2015. The water treatment capacity in 2000 was 43 mgd. A survey showed that the average per capita water use rate was 180 gpcd. Estimate the community’s water requirements in 2015, and state whether expanded treatment facilities will be needed by that date, assuming
(a) no change in use rate and
(b) a reduced rate of 160 gpcd.
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