Soil Erosion Calculator
Estimate annual soil loss using the Universal Soil Loss Equation based on rainfall, soil type, slope, and cover.
Annual Soil Loss
2.88 tons/ha/year
Annual Soil Loss vs Rainfall Erosivity (R)
Formule
## How to Calculate Soil Erosion (USLE) The Universal Soil Loss Equation estimates average annual soil erosion. ### Formula **A = R * K * LS * C * P** - **R** = Rainfall erosivity - **K** = Soil erodibility (sandy=0.02, loam=0.03, clay=0.04) - **LS** = Slope length and steepness (flat=0.5, moderate=2, steep=5+) - **C** = Cover management (forest=0.01, grass=0.1, bare=1.0) - **P** = Conservation practice (none=1.0, contour=0.5, terracing=0.1) Soil loss tolerance is typically 5 tons/ha/year for sustainable agriculture.
Exemple Résolu
Farmland with R=200, K=0.03, LS=2, C=0.3 (row crops), P=0.8 (minimal conservation).
- 01Soil loss: 200 * 0.03 * 2 * 0.3 * 0.8 = 2.88 tons/ha/year
- 02Per acre: 2.88 / 2.471 = 1.17 tons/acre/year
- 03vs tolerance: 2.88 / 5 * 100 = 58% of limit
- 04With best practices (P=0.3): 200 * 0.03 * 2 * 0.3 * 0.3 = 1.08 tons/ha/year
Questions Fréquentes
What is the USLE?
The Universal Soil Loss Equation (USLE) was developed by the USDA to predict average annual soil loss from sheet and rill erosion. It has been the standard erosion model since the 1960s.
How much soil loss is acceptable?
The USDA defines soil loss tolerance (T value) at 1-5 tons per acre per year, roughly equal to the rate of natural soil formation. Losses above this degrade productivity over time.
What are the best erosion control practices?
Cover crops, no-till farming, contour plowing, terracing, buffer strips, and maintaining permanent vegetation on steep slopes are the most effective erosion control methods.