Question

Floods can be prevented by :
A)Afforestation
B)Cutting the forest
C)Filing the land
D)Removing top layer of soil

Answer 1

Hint: Floods are the most common form of natural disaster and occur when land that is normally dry is flooded by an overflow of water. Heavy rainfall, rapid snowmelt or a storm surge from a tropical cyclone or tsunami in coastal areas are also the cause of floods.

Flooding most often happens due to heavy rainfall when natural watercourses are unable to bear excess water.

Complete answer:
Floods can be prevented by afforestation.
Afforestation means planting trees to improve interception and storage in a drainage basin while reducing surface runoff. This lowers the discharge of a river and therefore makes it less likely to flood. Afforestation also avoids mass waste, which decreases the amount of soil entering the river and holds the potential of the rivers high. Afforestation can be very effective at minimising the risk of flooding when combined with floodplain zoning. Planting trees helps to stop erosion since the soil is bound by the roots.

Lets see options :
Afforestation : Afforestation can be very effective at minimising the risk of flooding when combined with floodplain zoning thus this option is correct.
Cutting the trees : In the flooding equation, deforestation plays many roles because trees avoid drainage of sediments and forests store and use more water than farms or grasslands thus this option is wrong.
Filing the land : filing the land can’t prevent floods thus this option is wrong too.
Removing the top layer of soil : soil erosion is one of the causes of flooding thus this option is wrong too.

Hence, the correct answer is option (A)

Note: Go to the highest possible ground floor to remain secure during a storm.If your skin is in touch with flood water, make sure to wash it with disinfected water and soap because the contents are uncertain.
2018 Kerala floods are a major tragedy, more than 36,000 people have been displaced across the state and 445 people have died, for the first time in history, in addition to all the 5 gates of the Idukki Dam have been opened.