How do contour bunding and contour farming capture rainfall?

Contour farming and contour bunding are essential soil conservation techniques used to combat desertification by managing water movement on sloped land.

How They Capture Rainfall

• Contour Farming: This practice involves tilling and planting crops along lines of consistent elevation across a slope. The resulting furrows, crop rows, and wheel tracks act as small reservoirs that catch and retain rainwater. By preventing water from flowing rapidly down the slope, these features allow for increased infiltration into the soil and ensure a more uniform distribution of moisture.12
• Contour Bunding: This technique involves placing lines of stones or other barriers along the natural rises of a landscape. These structures serve as physical obstacles that capture and hold rainfall before it can become surface runoff. By slowing the water, contour bunding allows it to soak into the ground, which keeps the soil moist and heavy, thereby inhibiting both water and wind erosion.2

Both methods are highly effective at mitigating the impacts of heavy rains and reducing the loss of topsoil, which is critical for maintaining land productivity in dryland regions.12