What effect does repeated raindrop impact have on soil?

Repeated raindrop impact on soil leads to the formation of a slurry that can seal the pore spaces within the soil. When raindrops hit the soil surface, they can displace soil particles. If this impact is frequent, it can cause the soil particles to become compacted and create a layer of fine particles on the surface. This fine particle layer can fill larger pore spaces, reducing the overall porosity of the soil. As a result, the sealed pore spaces limit water infiltration and air movement, which can negatively affect plant growth and soil health.

This process is significant, particularly in the context of erosion and sediment control, as it illustrates how physical forces can alter the physical structure of soil and impact its ability to absorb water properly. Other effects, such as enhanced soil fertility, deep root growth, or increased soil permeability, do not directly result from the repeated impact of raindrops and do not align with the primary consequence of soil compaction and sealing.