Which one of the following data is not required for design of a weir or a barrage?
- AHigh flood level for the river at the weir site
- BMaximum flood discharge for the river at the weir site
- CRiver cross-section at the weir site
- DDischarge of the riverCorrect
Solution
Concept
Data needed for the design of a weir
Step-by-step solution
1. The design needs the high flood level, the maximum flood discharge, the river cross-section, the low-water and canal data and the soil data. 2. A vague "discharge of the river" is not one of the standard design data (the specific maximum flood and low-water discharges are).
Explanation
The listed items (a), (b) and (c) are standard design data for a weir or barrage.
Why the other options are wrong
HFL, the maximum flood discharge and the river cross-section are all required.
Shortcut
Weir design needs HFL, Qmax, cross-section, levels and soil data.
Correct answer: D) Discharge of the river