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| 1 | 80年来埃塞俄比亚北部高原土地利用/覆被变化(英文)显示文摘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 km2), Northern Ethiopia, over 80 years(1935–2014). Aerial photographs(APs) of the 1930 s 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 1930 s, shrubland(48%) was dominant, followed by cropland(39%). The fraction of cropland in 2014(42%) remained approximately the same as in the 1930 s, while shrubland significantly dropped to 37%. Forests shrank further from a meagre 6.3% in the 1930 s 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. | ETEFA Guyassa Amaury FRANKL Sil LANCKRIET BIADGILGN Demissie GEBREYOHANNES Zenebe AMANUEL Zenebe Jean POESEN Jan NYSSEN | 2018 | Journal of Geographical Sciences2018，28，10： | 3 |
| 2 | Litter production and organic matter accumulation in exclosures of the Tigray highlands, Ethiopia 显示文摘 | Descheemaeker K Muys B Nyssen J | 2006 | Forest Ecology and Management2006，233，： | 1 |
| 3 | Spatial distribution of rock fragments in cultivated soils in northern Ethiopia as affected by lateral and vertical displacement processes 显示文摘 | Nyssen J Poesen J | 2002 | Geomorphology2002，43，： | 1 |
| 4 | Human impact on the environment in the Ethiopian and Eritrean highlands—a state of the art显示文摘 | Jan Nyssen Jean Poesen Jan Moeyersons Jozef Deckers Mitiku Haile Andreas Lang | 2003 | Earth Science Reviews2003，，3： | 1 |
| 5 | Litter production and organic matter accumulation in exclosures of the Tigray highlands, Ethiopia显示文摘 | Deseheemaeker K Muys B Nyssen J | 2006 | Forest Ecology and Management2006，233，： | 1 |
| 6 | Repetitive transcranial magnetic stimulation improves open field locomotor recovery after low but not high thoracic spinal cord compression-injury in adult rats显示文摘 | Poirrier AL Nyssen Y Schohes F | 2004 | J Neurosci Res2004，75，2： | 1 |
| 7 | Repetitive transcranial magnetic stimulation improves open field locomotor recovery after low but not high thoracic spinal cord compression-injury in adult rats 显示文摘 | Poirrier AL Nyssen Y Scholtes F | 2004 | J NeurosciRes2004，75，2： | 1 |
| 8 | Impact of road building on gully erosion risk: a case study from the northern Ethiopian highlands显示文摘 | Nyssen J Poesen J Moneryersons J | 2002 | Earth Surface Process and Land Forms2002，27，： | 1 |
| 9 | Impact of road building on gully erosion risk: a case study from the northern Ethiopian highlands 显示文摘 | NYSSEN J MOERYERSONS J POESEN J | 2002 | Earth Surface Process and Landforms2002，27，： | 1 |
| 10 | Tillage erosion on slopes with soil conservation structures in the Ethiopian highlands显示文摘 | Jan Nyssen Jean Poesen Mitiku Haile | 2000 | Soil and Tillage Research2000，57，3： | 1 |
| 11 | Land reclamation using reservoir sediments in Tigray,northern Ethiopia显示文摘 | Girmay Gebreyohannes Nyssen J Poesen J | | 0，，28： | 1 |
| 12 | Human impact on the environment in the Ethiopian and Eritrean highlands-a state of the art显示文摘 | NYSSEN J POESEN J MOEYERSONS J | 2004 | Earth-Science Reviews2004，64，27： | 1 |
| 13 | Linking long- term gully and river channel dynamics to environmental change using repeat photography (Northern Ethiopia) 显示文摘 | Frankl A Nyssen J Dapper DE | 2012 | Geomorphol- ogy2012，，129： | 1 |
| 14 | Runoff and sedimentassociated nutrient losses under different land uses in Tigray, Northern Ethiopia显示文摘 | Girmay G Singh B R Nyssen J | 2009 | Journal of Hydrology2009，376，12： | 1 |
| 15 | Vascular active contour for vessel tree segmentation显示文摘 | Shang Y Deklerck R Nyssen E | 2011 | IEEE Transac- tions on Biomedical Engineering2011，58，4： | 1 |
| 16 | SSocial Enterpriseocial in Europe:Recent Trends and Develop Developments显示文摘 | Jacques Defourny Marthe Nyssens | 2008 | Social enterprise Journal2008，，4： | 1 |
| 17 | Runoff and sediment- associated nutrient losses under different land uses in Tigray, Northern Ethiopia显示文摘 | Girmay G Singh B R Nyssen J | 2009 | Journal of Hydrology2009，376，12： | 1 |
| 18 | Humus Form Development during Forest Restoration in Exclosures of the Tigray Highlands, Northern Ethiopia 显示文摘 | DESCHEEMAEKER K MUYS B NYSSEN J | 2009 | Restoration ecology2009，17，2： | 1 |
| 19 | Impact of road building on gully erosion risk:a case study from the northern Ethiopian highlands显示文摘 | Nyssen J moeryersons J | 2002 | Earth Surface Process and Landforms2002，27，： | 1 |
| 20 | Spatial distribution of rock fragments in cultivated soils in northern Ethiopia as affected by lateral and vertical displacement processes显示文摘 | Nyssen J Poesen J | 2002 | Geomorphology2002，43，： | 1 |
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