Reducing erosion
Explanation
Terrace farming is a soil conservation practice specifically designed for hilly or mountainous regions where the slope of the land is steep.
The construction of broad flat terraces on steep slopes serves the following purposes:
- Reducing Surface Runoff: On a steep slope, gravity causes water to flow downwards rapidly. By cutting the slope into a series of flat steps (terraces), the speed of the water flow is significantly reduced.
- Preventing Soil Erosion: Rapidly flowing water carries away the fertile topsoil. By slowing down the water, terraces prevent the soil from being washed away. This is the primary objective of the method.
- Enhancing Water Infiltration: The flat surfaces allow water to stand for longer periods, facilitating better infiltration into the ground, which improves soil moisture for crops.
Therefore, the primary aim is to check the flow of water to reduce soil erosion.
Key Takeaway: Terrace farming modifies the topography of steep slopes into flat steps to decrease the velocity of surface runoff, thereby minimizing soil erosion and conserving water.