Question

How are deforestation and erosion associated with each other? Explain.

Answer 1

• Deforestation refers to the large-scale removal of trees and forests from an area. Trees play an important role in protecting the soil from erosion.
• The roots of trees hold the soil firmly together. They bind soil particles and prevent them from being easily carried away by water or wind.
• When trees are cut down, the soil becomes loose and exposed. During heavy rainfall, rainwater flows over the bare land and washes away the fertile topsoil. This is known as water erosion.
• Forests also reduce the speed of surface runoff. Leaves, branches and roots allow rainwater to enter the soil slowly. When forests are removed, more water flows rapidly over the surface, increasing soil erosion.
• In dry regions, the absence of trees leaves the soil exposed to strong winds. Loose and dry soil particles can be blown away, causing wind erosion.
• Deforestation can also reduce the fertility and moisture-holding capacity of the soil because the nutrient-rich topsoil is lost.
• Continuous erosion may form gullies and deep channels, making the land unsuitable for cultivation. It can also increase the chances of floods and landslides in some areas.

Therefore, deforestation and erosion are closely related. The removal of forests makes soil more vulnerable to erosion, while severe erosion reduces the quality and productivity of the land.