chapter 8b

Question 1

Universal Soil Loss Equation

Answer 1

empirical equation that estimates soil erosion raindrop impact and surface runoff

Question 2

who developed USLE

Answer 2

walter h wischmeier
dwight d smith

Question 3

formula of USLE

Answer 3

A= 0.224 * RKLSCP

Question 4

R
K
L
S
C
P

Answer 4

R: rainfall erosivity index
K: soil erodibility
L: slope length
S: slope steepness
C: plant cover factor
P: erosion control practice

Question 5

limitations of USLE

Answer 5

1. developed in america, not suitable for tropical countries
2. only to sheet erosion
3. exudes areas with slope above 40%
4. average data over 20 years, not for individual storms
5. neglects interaction between factors