- Average Water consumption or Design flow:
It is the amount of water consumed in a community or city for various purposes. It is generally expressed as the ” Quantity of water per person in one day on the average.”
Average Daily Per Capita Demand
= Quantity Required in 12 Months/ (365 x Population)
Its units are lpcd, gpcd or m3pcd.
- Maximum daily water consumption :
It is the maximum amount of water used in one day throughout the year.
Maximum daily water consumption or demand is calculated as follows:
Maximum daily water consumption =
1.8 × Average daily demand
- Peak hourly water consumption :
It is the maximum amount of water consumed in one hour of maximum day during any month of year.
Peak hourly water consumption.
= 1.5 x average hourly demand
= 1.5 x Maximum daily demand/24
= 1.5 x (1.8 x average daily demand)/24
= 2.7 x average daily demand/24
= 2.7 x annual average hourly demand