Land-use change and its socio-environmental impact in Eastern Ethiopia’s highland
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- 作者：Derege Tsegaye Meshesha (1)
Atsushi Tsunekawa (1)
Mitsuru Tsubo (1) (4)
Syed Ahmad Ali (2)
Nigussie Haregeweyn (1) (3) - 关键词：Image classification ; Land ; use change ; Satellite image ; Land degradation ; Lake retreat ; Alemaya
- 刊名：Regional Environmental Change
- 出版年：2014
- 出版时间：April 2014
- 年：2014
- 卷：14
- 期：2
- 页码：757-768
- 全文大小：5,240 KB
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Atsushi Tsunekawa (1)
Mitsuru Tsubo (1) (4)
Syed Ahmad Ali (2)
Nigussie Haregeweyn (1) (3)
1. Arid Land Research Center, Tottori University, 1390 Hamasaka, Tottori, 680-0001, Japan
4. Institutes for Soil, Climate and Water, Agricultural Research Council, 600 Belvedere Street, Arcadia, Pretoria, 0083, South Africa
2. Department of Geology, Aligarh Muslim University, Aligarh, 202002, UP, India
3. Department of Land Resources Management and Environmental Protection, Mekelle University, Tigray, P.O. Box 231, Mek’ele, Ethiopia - ISSN：1436-378X
文摘
The Alemaya district (Eastern Ethiopian highlands) is characterized by undulating physiographic features with arid, semi-arid, and humid climatic conditions. This study evaluated socio-environmental changes in land use and land cover during 1985-011. Screen digitization on remotely sensed data (i.e., Landsat images from 1985 to 2011) was performed to produce 10 classes of land use and land cover. Then, final land-use maps were prepared using a geographic information system following field verification and accuracy assessment. The drying of water bodies, including the prominent lakes Alemaya, Adele, and Tinike, had been the most important environmental change observed. Degraded land, marsh, perennial cropland, and residential areas increased by 37, 438, 42, and 190?%, respectively, whereas grassland, plantation, shrubland, and temporal cropland decreased by 64, 11, 63, and 29?%, respectively. The increase in land degradation (+37?%), the other major observed problem, has made large areas unsuitable for agriculture and has reduced crop productivity. These land-use and land-cover changes have affected both the environment and the livelihoods of local residents; especially the issue related to land degradation requires urgent attention.