What is the side slope ratio of a trapezoidal Cipolletti weir? (MCAER 2020)

✅Explanation: The Cipolletti weir is designed with a specific side slope ratio of 1:4 (horizontal:vertical) to compensate for end contractions and ensure accurate flow measurement.

• Detailed Solution:
-Submerged weir or Drowned weir: Weir with water level on downstream side above crest.
-Cipolletti weir: Trapezoidal weir with side slopes 1 horizontal to 4 vertical.
-Purpose of slope: To obtain increased discharge through triangular portions of weir, otherwise decreased due to end contractions in rectangular weirs.

🔑Key Points:
-Cipolletti weir: Trapezoidal weir with side slopes 1:4 (H:V).
Purpose: To compensate for end contractions and ensure accurate flow measurement.