Question

General requirements of the permanent structures for gully control are: A. They should be constructed with permanent material, B. They should have adequate capacity to handle the run-off, C. They should help in stabilizing the gully, D. Perennial grasses required, E. Chute spillway are used at the bend to convey the water safely to the gully bed.

• A. A, B and D only
• B. A, B, C and D only
• C. A, B and E only
• D. A, B, C and E only

Hint:

Permanent gully control structures should be durable, safe for runoff disposal and capable of stabilizing the gully.

Answer 1

The Correct Option is D

Concept:
Permanent gully control structures are built to safely dispose runoff and stabilize gullies.

Step 1: Permanent material.
Permanent structures should be made of durable material. \[ A \text{ is correct} \]

Step 2: Runoff capacity.
They must have enough capacity to handle expected runoff. \[ B \text{ is correct} \]

Step 3: Stabilization of gully.
The main purpose is to stabilize the gully and prevent further erosion. \[ C \text{ is correct} \]

Step 4: Perennial grasses.
Perennial grasses are vegetative measures and are not a general requirement of permanent structures. \[ D \text{ is not selected} \]

Step 5: Chute spillway.
Chute spillways may be used to safely convey water to the gully bed. \[ E \text{ is correct} \] Thus: \[ A,B,C,E \] \[ \therefore \text{Correct Answer is (D)} \]