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5 years ago

Die Wirksamkeit von Boden

Die Wirksamkeit von Boden

Land use-land cover and

Land use-land cover and normalized difference vegetation index changes in Wello whereas in 2009 it decreased to 6.7% (Table 4.3). On the other hand, grasslands/woody grasslands increased from 10.8% in 2000 to 25.4% in 2009. The other LULC changes were small. For example, the area covered by cultivated/other land uses decreased by less than 1%, forest cover by 0.7 %, and there was negligible change in water bodies. The major water bodies in the study area are lakes that have small watersheds, (namely Hayk, Hardibo and Maybar). Figure 4.2 Land use/land cover of Wello in: (a) 2000 and (b) 2009 42

Land use-land cover and normalized difference vegetation index changes in Wello Table 4.2 Classification accuracy error matrix based on pixel by pixel comparison a) LULC change of 2000, overall accuracy 79.2% and overall Kappa Statistics of 0.7158 Reference data Accuracy Kappa LULC types Cultivated Forest Degraded Grassland/ Water Row Product User (Kˆ) land/others woody woody bodies total statistics vegetation grassland Cultivated land/others 82 0 3 2 0 87 72.57 94.25 0.8067 Forest 5 51 3 0 1 60 91.07 85.00 0.8067 Degraded woody vegetation 18 3 35 1 2 59 77.78 59.32 0.5039 Grassland/woody grassland 8 2 4 20 0 34 86.96 58.82 0.5465 Water bodies 0 0 0 0 10 10 76.92 100 1.0000 Column total 113 56 45 23 13 250 b) LULC change of 2009, overall accuracy 76.0% and overall Kappa Statistics of 0.6733 Reference data Accuracy Kappa LULC types Cultivated Forest Degraded Grassland/ Water Row Product User (Kˆ) land/others woody woody bodies total statistics vegetation grassland Cultivated land/other 66 1 3 7 1 78 80.30 82.81 0.7665 Forest 2 53 2 6 1 64 61.90 81.25 0.7953 Degraded woody vegetation 0 3 13 0 0 16 73.33 84.62 0.7596 Grassland/woody grassland 22 9 3 47 0 81 78.33 58.02 0.4477 Water bodies 0 0 0 0 11 11 84.62 100.00 1.0000 Column total 90 66 21 60 13 250 43

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