What is the importance of the narrower bottom in oval-shaped sewers during low-flow conditions?
Maintained higher flow velocity
Oval-shaped sewers have a narrower bottom section compared to circular sewers. During low-flow conditions, the reduced cross-sectional area at the bottom concentrates the flow, maintaining a higher velocity. This self-cleansing velocity (typically ≥0.6 m/s) prevents sediment deposition inside the sewer. This makes oval sewers suitable for sewers experiencing widely varying flow rates.
Important Questions from Design of Sewer
Select the correct statement with respect to oval or egg shaped sewers.
Which of the following statements is NOT correct?
In Self cleansing velocity
Which gas is the basic cause of Crown Corrosion
Consider the following statements with respect to the circular sewer.
A. It offers less opportunities for deposits.
B. It is the most economical section since it utilizes a minimum quantity of material.
