埃塞俄比亚北部Aykoleba地区土地利用和土地覆盖(LULC)动态和当地人看法的研究

M. Mehari, Maryo Melesse, L. Jianhua
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引用次数: 4

摘要

人们认为,自农业出现以来,LULC发生了变化。然而,在各个层面上,LULC变化的速率、程度和强度都在加剧。本研究旨在结合遥感数据和地面实况数据,研究埃塞俄比亚Aykoleba地区过去40年(1973-2013)土地利用价值变化的动态和感知。采用焦点小组讨论来获取关于土地退化状况的数据。遥感数据使用MSS(1973)、Landsat TM(1986和2000)和Landsat ETM ?(2013),空间分辨率为30m。使用ArcGIS10.2和ERDAS Imagine13.1生成LULC类。据此,确定了4类土地利用价值,其中森林和裸地土地利用价值分别增加了8.8%和54.9%。森林覆盖的增加与在家庭花园、农田和退化地区附近种植桉树有关。裸地的增加与丘陵区耕地撂荒和过度放牧等因素有关,但开放灌木和草地、耕地和居民点的土地覆盖等级分别减少了27.4%和37.8%。当地社区认为人口压力是研究区土地利用价值变化的主要驱动因素。过度放牧和缺乏适当的土地使用政策也是变化的重要原因。因此,我们建议在埃塞俄比亚制定土地利用计划和适当的人口政策。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The study of land use and land cover (LULC) dynamics and the perception of local people in Aykoleba, Northern Ethiopia
It is believed that since the advent of agriculture, changes in LULC have happened. However, rates, extents, and intensities of LULC changes have become more aggravated at all levels. The current study aims to examine the dynamics and perceptions of LULC change in the last 4 decades (1973–2013) in Aykoleba, Ethiopia using a combination of remote sensing data and the ground truth data. Focus Group Discussions were employed to obtain data on the status of land degradation. Remote sensing data were obtained using Landsat imageries of MSS (1973), Landsat TM, 1986 and 2000, and Landsat ETM ? (2013) with 30 m spatial resolution. ArcGIS10.2 and ERDAS Imagine13.1 were used to generate LULC classes. Accordingly, four LULC classes were identified, of which forest and bare LULC have been augmented by 8.8% and 54.9%, respectively. The escalation in forest cover is associated with the plantation of eucalyptus near the home gardens, farmlands, and degraded areas. Nevertheless, open bush and grassland, and cultivated and settlement land cover classes were lessened by 27.4% and 37.8%, respectively, although the increase in bare land is related to the abandonment of the cultivated land in hilly and sloppy areas, and overgrazing, among other factors. The local community perceived that population pressure is a top driver of LULC change in the study area. Overgrazing and lack of appropriate land use policy are also significant causes of change. Thus, we recommend the establishment of the land use plan and appropriate population policy in Ethiopia.
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