USLE Factors
Hoohohooo i'm coming again... what's up bro???
Actually i'm not verry well now, but it's okay to post something here...
Ok.. after last week we learned about soil erosion, now we learn to estimating soil erosion using Universal Soil Loss Equation (USLE). The question is why we use USLE?? The simple answer is USLE more simple and specific and you have to know the USLE has been successful and valuable tool to estimating Soil Erosion.
the equation is presented in the form:
A= R x K x LS x C x P
where :
A is the average annual soil loss in tonnes per hectare
R is measure of rainfall erosivity
K is soil erodibility
LS is length and slope factor
C is crop management factor
P is practice of conservation
Erosivity factor is computed by E1 method viz. summation of kinetic energy of rainfall (J/m2)
The Soil Erodibility is vulnerability to erosion. there are three broad group of factor which affect erodibility. the first, physical feature of the soil (chemical and physical composition). Second, topographyc feature (Slope of land). and the last is management of land (practice of conservation).
Length and slope are dependent of the site being estimate cause every site must be measured (using metric unit metre for length and percent for slope).
Crop and practice conservation using the calculation on Agricultural Handbook 537.
