Which practice helps manage groundwater to reduce erosion risk?

Seepage management is a critical practice for managing groundwater and consequently reducing erosion risk. By controlling the movement of water through the soil, seepage management helps ensure that excess groundwater does not cause soil saturation. When soil becomes saturated, its cohesion decreases, making it more susceptible to erosion due to surface runoff or other forces.

By implementing effective seepage management techniques, such as proper drainage systems, the risk of water accumulating in areas where it can erode soil is minimized. This allows for better control of water flow, preventing sudden increases in water levels that can destabilize soil structures.

In contrast, practices like implementing impermeable barriers or decreasing surface runoff address water flow at the surface and may not specifically target groundwater dynamics. While reducing vegetation density can affect erosion, it can also exacerbate the problem by removing root systems that stabilize soil. Therefore, seepage management stands out as the most effective practice for specifically managing groundwater's role in erosion control.