slope steepness-the speed of runoff increases on steep slopes, which increases the power of water to break off and carry soil particles.slope length-if a slope is long, water running down the slope becomes deeper and moves faster, taking more soil with it.nature of the soil (erodibility)-clay soils vary in their ability to withstand raindrop impact.
rainfall intensity (erosivity)-high intensity rainfall creates serious risk as heavy drops on bare soil causes the soil surface to seal.The vulnerability of soils to water erosion depends on: Well-structured soils are less prone to break up, and the impact of raindrops is minimised if the soil surface is protected by plant or litter cover. Water then accumulates on the surface and increases runoff which takes soil with it. These fragments wash into soil pores and prevent water from infiltrating the soil. Raindrops hit bare soil with enough force to break the soil aggregates. Queensland’s high intensity summer rainfalls represent a significant risk of erosion by water. If we want to save our soils, we need to understand the different types of erosion that can occur. Soil erosion is a widespread problem in rural and urban Queensland.
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