A residential subdivision encompasses 1100 acres with a housing density of four houses per acre. Assume that a high-value residence uses 800 g/day/house and has a fire flow requirement of 1000 gpm. If the water system has a daily peaking factor = 1.64 and an hourly peaking factor = 2.5, determine (a) the average daily demand of this subdivision and (b) the design-demand used to design the distribution system.

(a). The average daily demand of this subdivision is 2444.44 gallon/min.

(b). The design-demand used to design the distribution system is 2444.44 gallon/min.

Explanation:

Given that,

Area = 1100 acres

Number of house in 1 acres = 4

Per house water demand = 800 g/day/house

(a). We need to calculate the average daily demand of this subdivision

Using formula for average daily demand

The average daily demand of this subdivision is 2444.44 gallon/min.

(b). We need to calculate the design-demand used to design the distribution system

Using formula for the design-demand

Hence, (a). The average daily demand of this subdivision is 2444.44 gallon/min.

(b). The design-demand used to design the distribution system is 2444.44 gallon/min.

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