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利用遥感和 CA-Markov 模型分析埃塞俄比亚西南部马江森林生物圈保护区土地利用/土地覆盖变化的现状和未来预测。

Analysis of the Current and Future Prediction of Land Use/Land Cover Change Using Remote Sensing and the CA-Markov Model in Majang Forest Biosphere Reserves of Gambella, Southwestern Ethiopia.

机构信息

Addis Ababa University, Center of Environmental Sciences, Addis Ababa, Ethiopia.

Ethiopian Environments and Forestry Research Institute, Addis Ababa, Ethiopia.

出版信息

ScientificWorldJournal. 2021 Feb 23;2021:6685045. doi: 10.1155/2021/6685045. eCollection 2021.

Abstract

This study aimed to evaluate land use/land cover changes (1987-2017), prediction (2032-2047), and identify the drivers of Majang Forest Biosphere Reserves. Landsat image (TM, ETM+, and OLI-TIRS) and socioeconomy data were used for the LU/LC analysis and its drivers of change. The supervised classification was also employed to classify LU/LC. The CA-Markov model was used to predict future LU/LC change using IDRISI software. Data were collected from 240 households from eight kebeles in two districts to identify LU/LC change drivers. Five LU/LC classes were identified: forestland, farmland, grassland, settlement, and waterbody. Farmland and settlement increased by 17.4% and 3.4%, respectively; while, forestland and grassland were reduced by 77.8% and 1.4%, respectively, from 1987 to 2017. The predicted results indicated that farmland and settlement increased by 26.3% and 6.4%, respectively, while forestland and grassland decreased by 66.5% and 0.8%, respectively, from 2032 to 2047. Eventually, agricultural expansion, population growth, shifting cultivation, fuel wood extraction, and fire risk were identified as the main drivers of LU/LC change. Generally, substantial LU/LC changes were observed and will continue in the future. Hence, land use plan should be proposed to sustain resource of Majang Forest Biosphere Reserves, and local communities' livelihood improvement strategies are required to halt land conversion.

摘要

本研究旨在评估马江森林生物圈保护区的土地利用/土地覆盖变化(1987-2017 年)、预测(2032-2047 年)并确定其驱动因素。利用 Landsat 图像(TM、ETM+和 OLI-TIRS)和社会经济数据进行 LU/LC 分析及其变化驱动因素分析。还采用监督分类法对 LU/LC 进行分类。使用 IDRISI 软件的 CA-Markov 模型预测未来 LU/LC 变化。从两个区的八个 kebeles 收集了 240 户家庭的数据,以确定 LU/LC 变化的驱动因素。确定了五个 LU/LC 类:林地、农田、草地、住区和水体。农田和住区分别增加了 17.4%和 3.4%;而 1987 年至 2017 年间,林地和草地分别减少了 77.8%和 1.4%。预测结果表明,2032 年至 2047 年间,农田和住区将分别增加 26.3%和 6.4%,而林地和草地将分别减少 66.5%和 0.8%。最终,农业扩张、人口增长、轮作、薪柴采伐和火灾风险被确定为 LU/LC 变化的主要驱动因素。总的来说,观察到了大量的 LU/LC 变化,并将在未来继续。因此,应该提出土地利用计划,以维持马江森林生物圈保护区的资源,需要制定当地社区的生计改善战略,以阻止土地转换。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bd8e/7925022/5cf2deec9d58/TSWJ2021-6685045.001.jpg

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