Soil Erosion Study Sheet
USLE Calculation & Site Reporting Tool
1. Calculate Zone
Potential Soil Loss (A)
0.00
Tons / Acre / Year
Waiting for Input
2. Study Sheet Summary
| Zone | Factors (R/K/LS/C/P) | Soil Loss (A) | Risk Level | |
|---|---|---|---|---|
| No zones added yet. Calculate and add a zone on the left. | ||||
Project Details
USLE Factor Reference Guide
The Universal Soil Loss Equation (USLE) is A = R × K × LS × C × P. Use the values below as a general guide for US inputs.
R Factor (Rainfall)
Measure of rainfall erosivity.
• 20-50: Western US (Dry)
• 150-250: Midwest
• 300+: Southeast US (High)
• 20-50: Western US (Dry)
• 150-250: Midwest
• 300+: Southeast US (High)
K Factor (Soil Erodibility)
Inherent susceptibility of soil to erode.
• 0.05-0.15: Clay (Resistant)
• 0.25-0.4: Silt Loam (Moderate)
• 0.4+: Silt (High Susceptibility)
• 0.05-0.15: Clay (Resistant)
• 0.25-0.4: Silt Loam (Moderate)
• 0.4+: Silt (High Susceptibility)
LS Factor (Length/Slope)
Combined effect of slope length and steepness.
• < 0.5: Flat / Short Slopes
• 1.0 - 3.0: Moderate Construction Slopes
• 5.0+: Steep Embankments
• < 0.5: Flat / Short Slopes
• 1.0 - 3.0: Moderate Construction Slopes
• 5.0+: Steep Embankments
C Factor (Cover)
Effect of plants/mulch.
• 1.0: Bare Soil (Worst Case)
• 0.05: Mulch / Temporary Seeding
• 0.005: Established Grass/Sod
• 1.0: Bare Soil (Worst Case)
• 0.05: Mulch / Temporary Seeding
• 0.005: Established Grass/Sod
P Factor (Practice)
Support practices.
• 1.0: No support practices
• 0.5: Contouring
• 0.1-0.2: Terracing
• 1.0: No support practices
• 0.5: Contouring
• 0.1-0.2: Terracing
Threshold Settings
Soil loss above this value will be flagged as High Risk.