The distribution system of water supplies is designed in the basis of

Explanation:

• To ensure reliability, pipelines and pumping systems are designed for the greater of Peak Hourly Demand or Coincident Draft — so the system will not fail even under the highest expected load.

• The distribution system of water supply is the network of pipelines that delivers water to consumers.

• It must be designed to handle fluctuating water demands — during different times of day, seasons, or emergencies.

 Additional Information

Peak Hourly Demand (A):

• The maximum water demand occurring during the most critical hour of the day.

• This often happens during mornings or evenings when residential and commercial use is at its highest.

• The system must handle this peak to avoid pressure drops or shortages.

Coincident Draft (B):

• It represents the simultaneous maximum water demands of various parts of the system (or zones).

• Different areas may have peak demands at the same time — the system must also handle this scenario.

Average Daily Demand:

• The average amount of water used per day.

• Used for estimating overall supply but not sufficient for designing pipelines and pumps, which must handle peaks.