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Table 9 Estimated erosion rates and annual soil loss in sub-catchments of the northern catchment of Lake Tana

From: Estimation of soil loss using remote sensing and GIS-based universal soil loss equation in northern catchment of Lake Tana Sub-basin, Upper Blue Nile Basin, Northwest Ethiopia

Sub catchment

Entire catchment ha (%)

Very low erosion cells ha (%) and Soil loss tons/yr (%)

Low erosion cells ha (%) and Soil loss tons/yr (%)

Moderate erosion cells ha (%) and Soil loss tons/yr (%)

High erosion cells ha (%) and Soil loss tons/yr (%)

Extreme erosion cells ha (%) and Soil loss tons/yr (%)

Derma

60,118 (20.6)

39,549 (22.9) and 4912 (25.9)

12,619 (23.8) and 31,541 (24.3)

3685 (12.0) and

21,883 (14.6)

2998 (10.8)&

49,237 (8.2)

1267 (14.9) and

100,360 (12.5)

Gabi Kura

56,341 (19.3)

41,154 (23.8) and 6105 (32.2)

8695 (16.4) and 18,651 (14.4)

4462 (14.5) and 9234 (6.2)

1196 (4.3) and 17,828 (3.0)

834 (9.8) and 21,574 (2.7)

Garno

41,016 (14.1)

21,033 (12.2) and 1794 (9.5)

7151 (13.5) and 21,140 (16.3)

6582 (21.4) and 32,178 (21.5)

4601 (16.6)& 107,314 (18.0)

1649 (19.4) and 82,406 (10.2)

Gumero

54,029 (18.5)

29,289 (17.0) and 2962 (15.6)

10,563 (19.9) and 25,086 (19.4)

7509 (24.5) and 33,295 (22.3)

4682 (16.8)& 136,306 (22.8)

1986 (23.3) and 128,007 (15.9)

Megech

80,727 (27.6)

41,081 (24.1) and 3194 (16.8)

14,082 (26.5) and 33,201 (25.6)

8461 (27.6) and 52,969 (35.4)

14,322 (51.5)& 286,709 (48.0)

2781 (32.7) and 472,683 (58.7)