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首页> 外文期刊>Journal of Geosciences and Geomatics >Monitoring Environmental Changes and Their Drivers: The Case Study of Central Ethiopian Highlands
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Monitoring Environmental Changes and Their Drivers: The Case Study of Central Ethiopian Highlands

机译:监测环境变迁及其司机:中部埃塞俄比亚高地的案例研究

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The central Ethiopian highlands, which are attracting massive population influx from the surrounding areas, are being subjected to myriad environmental changes and impacts thereof. Hence, an in-depth understanding of the statuses, and trends of the environmental resources on the highland is critical. This study used archived remotely sensed Landsat data to produced Land Use and Land Cover maps of the highlands and changes over 32 years (1985 – 2017). The Hybrid Maximum Likelihood Algorithm and image segmentation techniques; and Land Change Modeler were deployed. Accordingly, Agricultural lands, Grass/Bare lands, Lakes/Ponds, Scrublands, Settlement/Urban areas, Vegetation areas, and Wetlands were detected and mapped. Overall mapping accuracies and kappa statistics ranged between 84% - 87.6% and 95.7% - 94.4%, respectively. Agriculture is the dominant Land Use and Land Cover type throughout, though the compositions of the remaining Land Use and Land Cover types have changed since 1985; except for Lakes/Ponds, and Wetlands. Settlement/Urban areas have grown by 546%, at the expense of agricultural lands and vegetation areas, a condition that is exposing farmers to the loss of massive cropland and woodlands. Additionally, Agricultural lands have changed into Grass/Bare lands and Scrublands, as shreds of evidence of the environmental impacts of the rapid urbanization. Therefore, with an anticipated growing population and urban expansion on the highland, it is essential to promote practices of sustainable land resource management and development in the region.
机译:埃塞俄比亚中央高地吸引了来自周边地区的大规模人口涌入,正在受到无数的环境变化和对其影响。因此,深入了解高地环境资源的状态和趋势至关重要。本研究使用存档远程感性的Landsat数据,以生产土地利用和陆地覆盖地图,并在32岁以下(1985 - 2017)。混合最大似然算法和图像分割技术;并部署了陆地变更车型。因此,检测到和映射农田,草/裸地,湖泊/池塘,灌木丛,沉降/城市地区,植被区和湿地。整体映射精度和κ统计分别在84% - 87.6%和95.7%至94.4%之间。农业是主要的土地利用和陆地覆盖型,尽管自1985年以来的剩余土地使用和土地覆盖类型的组成发生了变化;除了湖泊/池塘和湿地。结算/城市地区已经增长了546%,以农业土地和植被领域为代价,这是一个暴露农民丧失大规模农田和林地的条件。此外,农业土地已变为草/裸地和灌木丛,如迅速城市化的环境影响的碎片。因此,在高地的人口增长和城市扩张中,必须促进该地区可持续土地资源管理和发展的实践至关重要。

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