使用多MODIS卫星数据的土地利用/土地覆盖和植被的空间时间变化,西埃塞俄比亚
Tesema Kebede Seifu1,2, Tekalegn Ayele Woldesenbet2, Taye Alemayehu2
1Haramaya Institute of Technology, Haramaya University, P.O. Box 138, Dire Dawa, Ethiopia.
TheScientificWorldJournal
|November 9, 2023
概括
埃塞俄比亚西部的土地利用变化显示,木质草原和草原的面积显著增加,在过去二十年中,整体植被覆盖面增加了64%. 这些变化会影响水资源管理和环境政策.
科学领域:
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
- 地理信息系统 (GIS) 是指地理信息系统.
背景情况:
- 土地使用和土地覆盖 (LULC) 动态对当代水资源管理构成重大挑战.
- 了解LULC和植被指数的时空变化对于有效的环境规划至关重要.
研究的目的:
- 分析过去20年来埃塞俄比亚西部的土地利用和土地覆盖 (LULC) 和规范差异植被指数 (NDVI) 的变化.
- 评估LULC和NDVI波动的空间和时间覆盖范围.
主要方法:
- 利用中等分辨率成像光谱辐射仪 (MODIS) 卫星数据用于四个不同的时期 (2001-2020) 的LULC和NDVI变化检测.
- 分类的LULC类型包括森林,草原,草原,湿地,耕地,城市地区和水体.
- 获得了85.4%的整体分类准确率和81.2%的分类图像的kappa统计数据.
主要成果:
- 观测到木质草原 (119.6%),叶落式宽叶森林 (57.7%),草原 (45.2%),永久湿地 (37%) 和混合森林 (21.3%) 的大幅增加.
- 在2001年至2020年期间,农田 (90.1%),水体 (19.8%),草原 (13.2%) 和常青宽叶森林 (4.8%) 显著减少.
- 从2001年到2022年,总体植被覆盖率增加了64%.
结论:
- 该研究强调了埃塞俄比亚西部LULC显著的转变,植被面积显著扩大.
- 调查结果为明智的水资源管理,环境保护战略和政策制定提供了关键数据.
- 观察到的趋势强调了需要适应性管理方法来应对正在进行的环境变化.
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