are reduced agricultural productivity, ecological collapse, soil degradation, and the possibility of desertification. The Human Impact on the Natural Environment. 9 A spoil tip covered in rills and gullies due to erosion processes caused by rainfall: Rummu, Estonia Rill erosion refers to the development of small, ephemeral concentrated flow paths which function as both sediment source and sediment delivery systems for erosion on hillslopes.
It is likely that most of the cultivated areas around the globe are vulnerable to soil erosion. The more tillage that a field is subjected to, the greater the potential for soil erosion. Put simply, it is when topsoil, which is the upper-most layer of the ground, is moved from one spot to another. It shelters the soil from winds, which results in decreased wind erosion, as well as advantageous changes in microclimate. The biodiversity of aquatic plant and algal life is reduced, and invertebrates are also unable to survive and reproduce. This means outreach to farmers in susceptible areas for ways that they can help protect crops from inclement weather, or ways that they can help make sure their soil remains compact without restricting their plant growing activities. 2 3, intensive agriculture, deforestation, roads, anthropogenic climate change and urban sprawl are amongst the most significant human activities in regard to their effect on stimulating erosion. "Wind-erosion and wind-erosion research". It is severe during the times of drought in the asal regions. Scalenghe,.; Edwards,.C. Africa may be able to feed only 25 of its population by 2025 Archived at the Wayback Machine. Northern Journal of Applied Forestry.
When rainfall does not soak into the soil, it can gather on the surface and run downhill, forming small channels of water called rills. Arid Zone Geomorphology: Process, Form and Change in Drylands. Like other types of erosion, bank erosion needs to be managed. Valley or stream erosion occurs with continued water flow along a linear feature. 32 33 Soil compaction also affects the permeability of the soil to water, and hence the amount of water that flows away as runoff. A b Toy, Terrence.;. Also, the silt up can support plant life that can, in turn, cause cracks and weaken the structures. See also: Erosion prediction This section needs expansion.