武装冲突对埃塞俄比亚北部提格雷地区植被退化的影响

IF 7.3 1区 农林科学 Q1 ENVIRONMENTAL SCIENCES
Solomon Hishe , Eskinder Gidey , Amanuel Zenebe , Woldeamlak Bewket , James Lyimo , Jasper Knight , Tsegay Gebretekle
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引用次数: 0

摘要

过去三十年来,埃塞俄比亚北部提格雷地区为恢复退化景观所做的努力相对成功。然而,2020 年 11 月在该地区爆发的武装冲突极大地破坏了已恢复的植被,这些植被或与冲突直接相关(环境、污染、火灾),或与冲突间接相关(农业废弃)。本研究旨在评估以提格雷州梅凯莱市为中心半径 50 公里区域内植被覆盖的时空变化。使用 2000 年、2020 年和 2022 年的 Landsat Enhanced Thematic Mapper Plus (ETM+) 和 Operational Land Imager (OLI) 数据集评估植被覆盖动态,并使用 ENVI 5.3 和 ArcGIS 10.8.1 软件进行分析。这些数据使用修正归一化差异植被指数 (MNDVI)、优化土壤调整植被指数 (OSAVI) 和水分调整植被指数 (MAVI) 进行分析。根据 MNDVI,结果显示 2000-2020 年间植被覆盖面积增加了 179 平方公里,占总面积的 2%,而 2020-2022 年间植被覆盖面积减少了 403 平方公里,占总面积的 5%。与此同时,植被密度也有所下降。2020-2022 年的这些植被变化归因于武装冲突对地表的影响,包括农田和村庄被遗弃、杂草和灌丛植被蔓延或作物歉收。利用大地遥感卫星数据监测植被变化有助于了解武装冲突对农村农业景观的环境影响,包括潜在的粮食安全风险。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The impacts of armed conflict on vegetation cover degradation in Tigray, northern Ethiopia

Efforts made to restore the degraded landscape of the Tigray region, Northern Ethiopia, over the last three decades have been relatively successful. However, an armed conflict that broke out in the region in November 2020 has significantly destroyed the restored vegetation, either directly associated with conflict (environment, pollution, fire) or indirectly (agricultural abandonment). This study aimed at assessing spatio-temporal changes in vegetation cover in a 50 km radius zone centered on Mekelle city, Tigray. Vegetation cover dynamics was evaluated using Landsat Enhanced Thematic Mapper Plus (ETM+) and Operational Land Imager (OLI) datasets for the years 2000, 2020, and 2022 and analysed using ENVI 5.3 and ArcGIS 10.8.1 software. These data were analysed using the Modified Normalized Difference Vegetation Index (MNDVI), Optimized Soil Adjusted Vegetation Index (OSAVI), and Moisture Adjusted Vegetation Index (MAVI). Based on the MNDVI, results show that vegetation cover increased in the period 2000–2020 by 179 km2 or 2% of the area, whereas in the period 2020–2022, there was a decrease in vegetation cover by 403 km2 or 5% of the area. This was accompanied by a decrease in vegetation density. These vegetation changes in 2020–2022 are attributed to the impact of armed conflict on the land surface which can include farmlands and village abandonment, spread of weeds and scrub vegetation, or failure to harvest crops. Monitoring vegetation change using Landsat data can help understand the environmental impacts of armed conflict in rural agricultural landscapes, including potential food security risks.

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来源期刊
International Soil and Water Conservation Research
International Soil and Water Conservation Research Agricultural and Biological Sciences-Agronomy and Crop Science
CiteScore
12.00
自引率
3.10%
发文量
171
审稿时长
49 days
期刊介绍: The International Soil and Water Conservation Research (ISWCR), the official journal of World Association of Soil and Water Conservation (WASWAC) http://www.waswac.org, is a multidisciplinary journal of soil and water conservation research, practice, policy, and perspectives. It aims to disseminate new knowledge and promote the practice of soil and water conservation. The scope of International Soil and Water Conservation Research includes research, strategies, and technologies for prediction, prevention, and protection of soil and water resources. It deals with identification, characterization, and modeling; dynamic monitoring and evaluation; assessment and management of conservation practice and creation and implementation of quality standards. Examples of appropriate topical areas include (but are not limited to): • Conservation models, tools, and technologies • Conservation agricultural • Soil health resources, indicators, assessment, and management • Land degradation • Sustainable development • Soil erosion and its control • Soil erosion processes • Water resources assessment and management • Watershed management • Soil erosion models • Literature review on topics related soil and water conservation research
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