Table 7 Estimated soil loss and erosion rates in the northern catchment of Lake Tana
Soil erosion class (tons ha−1 year−1) | Area, ha (%) | Soil loss, tons/year (%) | Mean erosion rate (tons/ha/year) ± SD |
|---|---|---|---|
Very low (0–1) | 172,106 (58.9) | 18,879 (1.1) | 0.11 ± 0.27 |
Low (1–5) | 53,110 (18.2) | 129,676 (7.6) | 2.44 ± 1.16 |
Moderate (5–10) | 30,699 (10.5) | 149,581 (9.2) | 7.12 ± 1.54 |
High (10–50) | 27,800 (9.5) | 597,386 (35.0) | 20.80 ± 9.87 |
Extreme (≥ 50) | 8517 (2.9) | 809,848 (47.1) | 156.83 ± 285 |