EROSI

Types of Erosion 1.Water Erosion 2.Wind Erosion 3.Gravitical erosion 4.Frozen melt Erosion

Water Erosion Raindrops washes out seed and splashes soil into the air If the fields are on a slope the soil is splashed downhill which causes deterioration of soil structure. Soil that has been detached by raindrops is more easily moved than soil that has not been detached. Sheet erosion

Types of Water Erosion Sheet erosion the uniform removal of soil in thin layers from sloping land the loose soil merely runs off with the rain  RAINDROPS Rill erosion It occurs when soil is removed by water from little streamlets that run through land with poor surface draining. Gully erosion an advanced stage of rill erosion, just as rills are often the result of sheet erosion

Sheet erosion Rill erosion Gully erosion

Wind erosion Wind erosion is the movement and deposition of soil particles by wind Wind erosion occurs when soils bared of vegetation are exposed to high-velocity wind. When its velocity overcomes the gravitational and cohesive forces of the soil particles, wind will move soil and carry it away in suspension

Occurring mostly in flat, dry areas and moist sandy soils along bodies of water, wind erosion removes soil and natural vegetation, and causes dryness and deterioration of soil structure. Surface texture is the best key to wind erosion hazard potential

Gravitical erosion mass movement of soil - slides, slips, slumps, flows and landslides - gravity is the principal force acting to move surface materials such as soil and rock occurs when the weight (shear stress) of the surface material on the slope exceeds the restraining (shear strength) ability of that material Factors increasing shear stress include erosion or excavation undermining the foot of a slope, loads of buildings or embankments, and loss of stabilizing roots through removal of vegetation.

Frozen-melt erosion When water freezes, it expands suddenly and with tremendous force When water inside a crack in a rock freezes, its expansive strength may be sufficient to crack the rock and to break parts off it.