Assessment of Land use/Land cover Dynamics and Soil Erosion Estimation for Sustainable Management of Land Resources, A Case study in Gozamin Woreda, Amhara Region, North Central Ethiopia.
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Date
2007-07
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Addis Ababa Universty
Abstract
In countries like Ethiopia where agriculture sector has the basic contribution for gross
economy, land resource plays a major role in the level of production. In this regard the
Landuse/Landcover dynamics and land degradation that can happen in a certain region
has a serious pressure on the production of yield. Gozamin Woreda is one of the woredas
from Esat Gojjam zone, which is known for its surplus food production. However the
land use/land cover dynamics and soil erosion occurred recently in the Woreda has put
serious obstacle on the food security of the Woreda.To study the land use/land cover
dynamics Landsat 1 (MSS, 1972), Landsat 5(TM, 1986) and Landsat 7(ETM+, 1999) has
been used. The result during the period 1972 – 1999 shows that there is sharp increase in
cultivated land and grazing land, while there is a sharp decrease in bare land, and bush
land. The other interesting result gained from this particular study the forest area
coverage, which were only 3258.01(1.8 percent) of the total Woreda has increased to
4488.5764 (2.5 percent) of the total area. The basic reason for the increment of forest
coverage in Gozamin Woreda is the afforestation program carried out by the then
government of Dergue. The final actual erosion result for the Woreda shows that the
value ranges from nil to 1056.8 tone/hectare/year and the mean erosion rate is 9.251
tonne/hectar/year. The final result expressed in terms of area coverage; actual soil loss
less than 12 tone/hectare/year covers 72607 hectare (726.07 km2) of land and greater than
or equal to 12 tone/hectare/year and less than 211 tone/hectare/year covers 90471 hectare
(904.71km2) The remaining 16922 hectare (169.22 km2). From the total actual soil loss
occurred in the Woreda, 90 percent is below 211 tone/hectare/year. The remaining 10
percent of the total area is above 211 tone/hectare/year which can be said the high soil
erosion rate in the Woreda. The findings of this particular research suggest that land
degradation in the steep slopes is severe which need urgent intervention like afforestation
programs, terracing and other remedial solutions for the Woreda by integrating the local
knowledge of the people.
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Gozamin Woreda