Question
Download Solution PDFSewers must be checked for minimum velocities at their minimum hourly flows which is equal to:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
The peak flow can be considered as 1.5 times the annual average daily flow.
For a design of the treatment facility, the peak factor is considered as 1.5 times the annual average daily flow.
The minimum flow passing through sewers is also important to develop self-cleansing velocity to avoid silting in sewers. This flow will generate in the sewers during late night hours. The effect of this flow is more pronounced on lateral sewers than the main sewers.
Sewers must be checked for minimum velocity as follows:
Minimum daily flow = 2/3 Annual average daily flow
Minimum hourly flow = 1/2 Minimum daily flow
Minimum hourly flow = 1/3 Annual average daily flow
Last updated on May 28, 2025
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