Q. Which of the following measures can help in preventing flooding?
1.Strengthening embankments
2.Dredging of rivers
3.Zoning of flood plains
Select the correct answer from the codes given below:

[A] .1 and 2 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1, 2 and 3

Answer: D
Notes:
  • Strengthen embankments along the rivers: Most flood protection structures in Assam are over 50-60 years old.These were constructed on the main stem of the Brahmaputra and its tributaries way back in the 1960s and 1970s and have become weak now.
  • Dredging of Rivers: Dredging is the removal of sediments and debris from the bottom of lakes, rivers, harbors, and other water bodies.It is a routine necessity in waterways around the world because sedimentation—the natural process of sand and silt washing downstream—gradually fills channels and harbors.
  • Enact Flood Zoning Bill: Major flood-prone states such as Uttar Pradesh, Bihar, West Bengal, Assam, Odisha etc had not taken initiatives to enact the flood plain zoning bill.The bill envisages the zoning of the flood plain of a river according to flood frequencies and defines the type of use of flood plains.

Source: Article