埃塞俄比亚西北低地土地利用和土地覆盖变化及其相关驱动力

B. Alemu, E. Garedew, Z. Eshetu, H. Kassa
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引用次数: 89

摘要

埃塞俄比亚的林地正承受着巨大的压力,并且随着时间的推移正在萎缩。尽管林地具有重要的经济和生态价值,但对其长期状况的监测却很少受到重视。本研究的目的是通过分析土地利用和土地覆盖(LULC)动态来评估埃塞俄比亚西部干旱林地的状况,并考虑到其多功能、减缓气候变化的潜力以及改善当地生计,对其未来的可持续管理和发展提出建议。利用遥感(RS)和地理定位系统(GIS)对阿姆哈拉、提格雷和本尚古尔-古姆兹3个地区的土地利用价值动态进行了研究。三个研究地点分别为Metema、Kafta-Humera和Sherkole。在所有研究点,农用地和裸地类别分别以2322.9和726.6 ha/年的平均速度扩大。另一方面,近25年(1985-2010年),三区林地覆盖面积以平均2833.8 ha/ a的速度减少。林地覆盖以农业为主,平均转化速率为2057.9 ha/年。
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Land use and land cover changes and associated driving forces in North Western Lowlands of Ethiopia
Woodlands in Ethiopia are under heavy pressure and shrinking overtime. Despite the woodland's economic and ecological importance's, little attention has been given to monitor the condition of the resources through time. The aim of this study is to assess the status of western dry woodlands of Ethiopia by analyzing land use and land cover (LULC) dynamics and recommend their future sustainable management and development in view of their multi-functions, climate change mitigation potentials as well as local livelihood improvement. Remote sensing (RS) and Geographic Positioning System (GIS) were used to assess the LULC dynamics in three regional states (Amhara, Tigray, and Benshangul-Gumz). Three study sites: Metema, Kafta-Humera and Sherkole were selected, respectively. In all study sites the classes of agricultural land and bare land have expanded at an average rate of 2322.9 and 726.6 ha/year, respectively. On the other hand, the woodland cover in the three districts was decreasing at an average rate of 2833.8 ha/year in the past 25 years (1985-2010). The woodland cover was transformed mainly to agriculture at an average rate of 2057.9 ha/year.
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