Modelling Soil Erosion

Field studies for prediction and assessment of soil erosion are expensive, time-consuming and need to be collected over many years. Though providing detailed understanding of the erosion processes, field studies have limitations because of complexity of interactions and the difficulty of generalizing from the results. Soil erosion models can simulate erosion processes in the watershed and may be able to take into account many of the complex interactions that affect rates of erosion.

Rate of soil erosion

Factors of soil erosion

Susceptibility of soil to erosion

L

Soil erodibility

Climatic erosivity

Terrain

Ground covcr

- structure

- rainfall

- gradient

- canopy cover

- texture

( amount; intensity

- length

- biomass

- infiltration

frequency)

- aspect

- root

- O.M. content

- wind velocity

- shape

system

- water retention

- water & energy

- species

- CEC/AEC

balance

diversity

- cations

i

r

r

i

r

i

r

Susceptibility of soil to erosion

Causes of soil erosion

Economic deforestation

& biomass burning conversion of natural to agriculture tillage cropping system industrial landuse urbanization

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