Analysing land use/land cover changes and its dynamics using remote sensing and GIS in Gubalafito district, Northeastern Ethiopia
Analysing land use/land cover changes and its dynamics using remote sensing and GIS in Gubalafito district, Northeastern Ethiopia
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DOI：
10.1007/s42452-021-04915-8
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发表时间：
2022-01-01
影响因子：
2.6
通讯作者：
Ewunetu, Alelgn
中科院分区：
文献类型：
--
作者：
Abebe, Gebeyehu;Getachew, Dodge;Ewunetu, Alelgn
绘制和量化土地利用/土地覆盖（LULC）变化状况和变化驱动因素对于确定易受变化影响的地区和设计可持续的生态系统服务具有重要意义。本研究采用遥感与GIS相结合的方法，对埃塞俄比亚东北部Gubalafto地区近30年来土地利用价值变化的现状和主要驱动因素进行了分析，并对当地社区对土地利用价值格局和驱动因素的了解程度进行了调查。从1986年、2000年和2016年的Landsat影像中绘制了5种主要的LULC类型（耕地和聚落、森林覆盖、放牧地、灌木地和裸地）。结果表明：耕地和聚落是研究区最广泛的土地利用价值类型，增加了9%；调查还显示，在过去30年里，丛林和荒地面积大幅扩大。另一方面，具有高度环境重要性的LULC类别，如放牧地和森林覆盖，随着时间的推移，随着耕种和定居的扩大，急剧减少。1986年放牧面积约占研究总面积的11.1%，2016年下降至5.7%。相比之下，耕地和聚落从1986年的45.6%上升到2016年的49.5%。同期，灌木土地从14.8%增加到21%，而森林覆盖率从8.9%下降到2%。导致这一特定地区LULC变化的根本原因包括人口增长、土地使用权不安全、共同产权、持续贫困、气候变化以及公众意识缺乏。因此，必须控制LULC变化的原因，实现资源的可持续利用；否则，这些稀缺的自然资源基础将很快丧失，不再能够在可持续的生态系统服务中发挥作用。
Mapping and quantifying the status of Land use/Land cover (LULC) changes and drivers of change are important for identifying vulnerable areas for change and designing sustainable ecosystem services. This study analyzed the status of LULC changes and key drivers of change for the last 30 years through a combination of remote sensing and GIS with the surveying of the local community understanding of LULC patterns and drivers in the Gubalafto district, Northeastern Ethiopia. Five major LULC types (cultivated and settlement, forest cover, grazing land, bush land and bare land) from Landsat images of 1986, 2000, and 2016 were mapped. The results demonstrated that cultivated and settlement constituted the most extensive type of LULC in the study area and increased by 9% extent. It also revealed that a substantial expansion of bush land and bare land areas during the past 30 years. On the other hand, LULC classes that has high environmental importance such as grazing land and forest cover have reduced drastically through time with expanding cultivated and settlement during the same period. The grazing land in 1986 was about 11.1% of the total study area, and it had decreased to 5.7% in 2016. In contrast, cultivated and settlement increased from 45.6% in 1986 to 49.5% in 2016. Bush land increased from 14.8 to 21% in the same period, while forest cover declined from 8.9 to 2% in the same period. The root causes for LULC changes in this particular area include population growth, land tenure insecurity, and common property rights, persistent poverty, climate change, and lack of public awareness. Therefore, the causes for LULC changes have to be controlled, and sustainable resources use is essential; else, these scarce natural resource bases will soon be lost and will no longer be able to play their contribution in sustainable ecosystem services.