Question:
Given below are the two statements.
Statement I: Major functional uses of drop spillways are to control stream bed gradient, to serve as inlet/outlet, to control tail water at outlet, and also to serve as a reservoir.
Statement II: 'Stability' and 'Non-Clogging of Weir' cannot be considered as advantages of drip (drop) spillways.
In light of the above statements, choose the most appropriate answer from the options given below
Given below are the two statements.
Statement I: Major functional uses of drop spillways are to control stream bed gradient, to serve as inlet/outlet, to control tail water at outlet, and also to serve as a reservoir.
Statement II: 'Stability' and 'Non-Clogging of Weir' cannot be considered as advantages of drip (drop) spillways.
In light of the above statements, choose the most appropriate answer from the options given below
Statement I: Major functional uses of drop spillways are to control stream bed gradient, to serve as inlet/outlet, to control tail water at outlet, and also to serve as a reservoir.
Statement II: 'Stability' and 'Non-Clogging of Weir' cannot be considered as advantages of drip (drop) spillways.
In light of the above statements, choose the most appropriate answer from the options given below
Show Hint
Advantages of Drop Spillway: High hydraulic efficiency, structurally stable, simple rectangular crest avoids debris clogging.
Updated On: Sep 4, 2026
- Both Statement I and Statement II are true
- Both Statement I and Statement II are false
- Statement I is correct but Statement II is false
- Statement I is incorrect but Statement II is true
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
Drop spillways are structural weir drop structures installed in gully control, channel grade stabilization, and reservoir outlets.
Step 2: Detailed Explanation:
1. Statement I: Drop spillways stabilize channel gradients, lower water safely across overfalls up to 3 m, act as outlets for tile drainage or detention reservoirs, and control tailwater levels. Hence, Statement I is correct.
2. Statement II: Key inherent engineering advantages of straight drop spillways include high structural stability, low maintenance, and a wide open straight weir crest that is virtually free from floating debris clogging. Asserting they cannot be considered advantages is false.
Step 3: Final Answer:
Thus, Statement I is correct but Statement II is false, matching option (C).
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