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.
In Self cleansing velocity
According to CPHEEO, to avoid erosion due to sand and other gritty material carried in the sewer, the maximum velocity should not exceed ________.
Anti siphonage pipe is fitted:
To dispose waste water produced by public, the underground pipe line is laid down, which is known as
