Measures to control erosion

Key soil conservation strategies

Soil conservation aims to reduce soil loss by protecting the soil surface, increasing infiltration, and slowing runoff. The most important strategies include:

1. Maintain protective vegetation cover

• Use cover crops, intercropping, and mulching with crop residues.
• Keep the soil covered as much as possible to reduce raindrop impact and slow surface runoff.
• Establish vegetation strips, hedges, and grassed waterways to trap sediment and interrupt water flow.

2. Improve soil health and structure

• Increase soil organic matter through residue retention, compost, and suitable crop rotations.
• Reduce soil disturbance through conservation tillage or no-till practices.
• Apply amendments such as lime where appropriate to improve aggregate stability and soil cohesion.
• Avoid excessive soil compaction from heavy machinery.

3. Manage slopes and runoff

• Practice contour farming and contour tillage to reduce runoff velocity.
• Reduce effective slope length using vegetation barriers.
• Construct terraces on steep slopes to slow water movement and promote infiltration.
• Maintain drainage pathways that safely convey excess water.

4. Apply sustainable forestry practices

• Avoid large-scale clear-cutting where possible.
• Use strip logging or continuous-cover forestry to retain vegetation cover.
• Conduct logging operations when soils are frozen if conditions allow.
• Carefully design and maintain forest roads to minimize soil disturbance and erosion.

5. Manage urban stormwater

• Reduce runoff from impermeable surfaces using green roofs and rain gardens.
• Install retention ponds, buffers, and infiltration systems to store and slowly release water.
• Design drainage systems to safely manage excess stormwater and prevent downstream erosion.

Core Principle

Regardless of land use, effective soil conservation focuses on three goals:

• Protect the soil surface from rainfall impact.
• Increase infiltration and water storage in the soil.
• Reduce runoff velocity to minimize soil detachment and transport.

Together, these measures help maintain soil fertility, improve water quality, reduce flooding, and support sustainable land use.