Which one of the following is one of the objectives of the river training?
- ATo make the river change its course
- BTo protect the river banks by deflecting the river away from the attacked banksCorrect
- CTo avoid disposal of sediment load
- DTo avoid providing minimum water depth required for navigation
Solution
Concept
Objectives of river training
Step-by-step solution
1. River training aims to prevent the river from changing its course, to protect banks, to ensure efficient disposal of sediment and floods, and to provide the depth needed for navigation. 2. Deflecting the river away from attacked banks protects them.
Explanation
Groynes and spurs deflect the current away from eroding banks, so they serve the objective of protecting the banks.
Why the other options are wrong
Training prevents (not causes) course changes, ensures (not avoids) sediment disposal, and provides (not avoids) the navigation depth.
Shortcut
Training = protect banks, fix course, pass sediment and floods.
Common mistake
Choosing the opposite of an objective.
Correct answer: B) To protect the river banks by deflecting the river away from the attacked banks