Question

The earthen embankments constructed parallel to the river at some suitable distance for protection from flooding, are called
1. Groynes
2. Guide banks
3. Levees
4. Terraces

Answer 1

Correct Answer - Option 3 : Levees

Concept:

Levees construction is a method of river training. They are constructed to protect the riverbanks from flooding. It is basically an embankment constructed along the river so that water remains contained in between the levees during flooding.

Effects of levees construction:

• It reduces the width of the river stream, so flow velocity is increased.
• It contains the flood water in between the levees only, which increases the discharge.
• It increases the water surface elevation during flooding.
• It decreases the flood storage as maximum flood water becomes the part of discharge.