80年来埃塞俄比亚北部高原土地利用/覆被变化（英文）

编号 zgly0001645367

文献类型 期刊论文

文献题名 80年来埃塞俄比亚北部高原土地利用/覆被变化（英文）

作者 ETEFAGuyassa  AmauryFRANKL  SilLANCKRIET  BIADGILGNDemissie  GEBREYOHANNESZenebe  AMANUELZenebe  JeanPOESEN  JanNYSSEN 

作者单位 DepartmentofGeography  GhentUniversity  DepartmentofLandResourcesManagementandEnvironmentalProtection  MekelleUniversity  ResearchFoundationFlanders(FWO)  DepartmentofGeographyandEnvironmentalStudies  MekelleUniversity  InstituteofGe 

母体文献 Journal of Geographical Sciences 

年卷期 2018年10期

年份 2018 

分类号 F301.24 

关键词 fractionalmap  GoogleEarth  landuse/cover  multivariateadaptiveregression  Italianaerialphotographs 

文摘内容 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.