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Changes in land use/cover mapped over 80 years in the Highlands of Northern Ethiopia

(2018) JOURNAL OF GEOGRAPHICAL SCIENCES. 28(10). p.1538-1563
Author
Organization
Abstract
Despite many studies on land degradation in the Highlands of Northern Ethiopia, quantitative information regarding long-term changes in land use/cover (LUC) is rare. Hence, this study aims to investigate the LUC changes in the Geba catchment (5142 km(2)), Northern Ethiopia, over 80 years (1935-2014). Aerial photographs (APs) of the 1930s and Google Earth (GE) images (2014) were used. The point-count technique was utilized by overlaying a grid on APs and GE images. The occurrence of cropland, forest, grassland, shrubland, bare land, built-up areas and water body was counted to compute their fractions. A multivariate adaptive regression spline was applied to identify the explanatory factors of LUC and to create fractional maps of LUC. The results indicate significant changes of most types, except for forest and cropland. In the 1930s, shrubland (48%) was dominant, followed by cropland (39%). The fraction of cropland in 2014 (42%) remained approximately the same as in the 1930s, while shrubland significantly dropped to 37%. Forests shrank further from a meagre 6.3% in the 1930s to 2.3% in 2014. High overall accuracies (93% and 83%) and strong Kappa coefficients (89% and 72%) for point counts and fractional maps respectively indicate the validity of the techniques used for LUC mapping.
Keywords
CENTRAL PLATEAU REGION, COVER CHANGE, TIGRAY HIGHLANDS, RIFT-VALLEY, WATER CONSERVATION, EROSION FEATURES, SURFACE RUNOFF, DYNAMICS, SOIL, IMPACTS, fractional map, Google Earth, land use/cover, multivariate adaptive, regression, Italian aerial photographs

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Citation

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MLA
Dinssa, Etefa Guyassa, Amaury Frankl, Sil Lanckriet, et al. “Changes in Land Use/cover Mapped over 80 Years in the Highlands of Northern Ethiopia.” JOURNAL OF GEOGRAPHICAL SCIENCES 28.10 (2018): 1538–1563. Print.
APA
Dinssa, E. G., Frankl, A., Lanckriet, S., Mullaw, B. D., Gebreyohannes, Z., Amanuel, Z., Poesen, J., et al. (2018). Changes in land use/cover mapped over 80 years in the Highlands of Northern Ethiopia. JOURNAL OF GEOGRAPHICAL SCIENCES, 28(10), 1538–1563.
Chicago author-date
Dinssa, Etefa Guyassa, Amaury Frankl, Sil Lanckriet, Biadgilgn Demissie Mullaw, Zenebe Gebreyohannes, Zenebe Amanuel, Jean Poesen, and Jan Nyssen. 2018. “Changes in Land Use/cover Mapped over 80 Years in the Highlands of Northern Ethiopia.” Journal of Geographical Sciences 28 (10): 1538–1563.
Chicago author-date (all authors)
Dinssa, Etefa Guyassa, Amaury Frankl, Sil Lanckriet, Biadgilgn Demissie Mullaw, Zenebe Gebreyohannes, Zenebe Amanuel, Jean Poesen, and Jan Nyssen. 2018. “Changes in Land Use/cover Mapped over 80 Years in the Highlands of Northern Ethiopia.” Journal of Geographical Sciences 28 (10): 1538–1563.
Vancouver
1.
Dinssa EG, Frankl A, Lanckriet S, Mullaw BD, Gebreyohannes Z, Amanuel Z, et al. Changes in land use/cover mapped over 80 years in the Highlands of Northern Ethiopia. JOURNAL OF GEOGRAPHICAL SCIENCES. 2018;28(10):1538–63.
IEEE
[1]
E. G. Dinssa et al., “Changes in land use/cover mapped over 80 years in the Highlands of Northern Ethiopia,” JOURNAL OF GEOGRAPHICAL SCIENCES, vol. 28, no. 10, pp. 1538–1563, 2018.
@article{8573489,
  abstract     = {Despite many studies on land degradation in the Highlands of Northern Ethiopia, quantitative information regarding long-term changes in land use/cover (LUC) is rare. Hence, this study aims to investigate the LUC changes in the Geba catchment (5142 km(2)), Northern Ethiopia, over 80 years (1935-2014). Aerial photographs (APs) of the 1930s and Google Earth (GE) images (2014) were used. The point-count technique was utilized by overlaying a grid on APs and GE images. The occurrence of cropland, forest, grassland, shrubland, bare land, built-up areas and water body was counted to compute their fractions. A multivariate adaptive regression spline was applied to identify the explanatory factors of LUC and to create fractional maps of LUC. The results indicate significant changes of most types, except for forest and cropland. In the 1930s, shrubland (48%) was dominant, followed by cropland (39%). The fraction of cropland in 2014 (42%) remained approximately the same as in the 1930s, while shrubland significantly dropped to 37%. Forests shrank further from a meagre 6.3% in the 1930s to 2.3% in 2014. High overall accuracies (93% and 83%) and strong Kappa coefficients (89% and 72%) for point counts and fractional maps respectively indicate the validity of the techniques used for LUC mapping.},
  author       = {Dinssa, Etefa Guyassa and Frankl, Amaury and Lanckriet, Sil and Mullaw, Biadgilgn Demissie and Gebreyohannes, Zenebe and Amanuel, Zenebe and Poesen, Jean and Nyssen, Jan},
  issn         = {1009-637X},
  journal      = {JOURNAL OF GEOGRAPHICAL SCIENCES},
  keywords     = {CENTRAL PLATEAU REGION,COVER CHANGE,TIGRAY HIGHLANDS,RIFT-VALLEY,WATER CONSERVATION,EROSION FEATURES,SURFACE RUNOFF,DYNAMICS,SOIL,IMPACTS,fractional map,Google Earth,land use/cover,multivariate adaptive,regression,Italian aerial photographs},
  language     = {eng},
  number       = {10},
  pages        = {1538--1563},
  title        = {Changes in land use/cover mapped over 80 years in the Highlands of Northern Ethiopia},
  url          = {http://dx.doi.org/10.1007/s11442-018-1560-3},
  volume       = {28},
  year         = {2018},
}

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