How do you calculate soil erodibility factor?
How do you calculate soil erodibility factor?
in which K represents the soil erodibility factor (Mg ha h ha-1 MJ-1 mm-1); A is the annual soil loss (Mg ha-1 yr-1) determined in an experimental unit (standard) for 12 % slope; R is the rainfall erosivity factor (MJ mm ha-1 h-1); and S is the slope steepness factor to 12 % (1.536).
What is the K value in soil?
K factor is soil erodibility factor which represents both susceptibility of soil to erosion and the rate of runoff, as measured under the standard unit plot condition. Soils high in clay have low K values, about 0.05 to 0.15, because they resistant to detachment.
What is K factor in soil erosion?
The K Factor is an index which quantifies the relative susceptibility of the soil to sheet and rill erosion. Values range from 0.02 for the least erodible soils to 0.64 for the most erodible. • Soil properties affecting K Factor include texture, organic matter content, structure, and saturated hydraulic conductivity.
How do you calculate rainfall erosivity factor?
The rainfall erosivity is calculated by multiplying the kinetic energy by the maximum rainfall intensity during a period of 30-minutes for each rainstorm. The R-factor accumulates the rainfall erosivity of individual rainstorm events and averages this value over multiple years.
What is soil erodibility factor?
The soil erodibility factor (K-factor) is a quantitative description of the inherent erodibility of a particular soil; it is a measure of the susceptibility of soil particles to detachment and transport by rainfall and runoff. The soil erodibility factor ranges in value from 0.02 to 0.69 (Goldman et al.
What is erodibility index?
The soil erodibility index (EI) is the measure selected to determine whether a soil map unit is highly erodible. K = susceptibility of the soil to water erosion. · LS = the combined effects of slope length and steepness.
What is erodibility and Erosivity?
Conceptually, rainfall erosivity is the capacity of rain to produce erosion, whereas soil erodibility is the susceptibility of the soil to be eroded. Particles travel across the soil surface at virtual velocities that vary from the velocity of the flow to near zero.
What are the factors affecting erodibility?
Soil Erodibility Factors
- Infiltration rate, movement of water through the soil, and water storage capacity.
- Dispersion, detachability, abrasion, and mobility by rainfall and runoff.
What are factors affecting soil erodibility?
How does soil erodibility affect soil erosion?
Soil erodibility ( K ) is the intrinsic susceptibility of a soil to erosion by runoff and raindrop impact. Soil type effect on K: silt > silt loam = fine sand > loam > clay loam > clay > coarse sand. Note that wet clay soils that have expanded have increased risk.
What is soil erodibility index?
What factors will result into high soil erodibility in an area?
Simplifying, it turns out that erodibility depends essentially on the amount of organic matter in the soil, the texture of the soil, especially sand of 100-2000 microns and silt of 2-100 microns, and lastly the profile, the structure of the surface horizon and permeability (Figure 21).
