Question

Suggest any two methods to prevent siltation in waterways.

Answer 1

1. Afforestation and Riparian Vegetation: Planting trees and maintaining vegetation along riverbanks (riparian buffers) helps stabilise the soil with roots. This natural barrier slows down surface runoff, allowing sediment to settle on land rather than being washed into the water.
2. Construction of Check Dams: Building small, temporary or permanent barriers across stream channels reduces the velocity of water flow. This allows heavier sediment particles to settle behind the dam in a controlled area rather than accumulating downstream in major waterways.