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首页> 外文期刊>Earth sciences research journal >Geospatial assessment of eco-environmental changes in desertification area of the Brazilian semi-arid region
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Geospatial assessment of eco-environmental changes in desertification area of the Brazilian semi-arid region

机译：巴西半干旱地区荒漠化地区生态环境变化的地理空间评估

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Eco-environmental change prediction models are important decision tools for policy makers, as they help to quantify environmental sensitivity and to understand the relationship between human activities and environmental quality. Thus, this paper aims to analyze eco-environmental changes in Monteiro County, a semi-arid zone within northeastern Brazil between 1987 and 2010, by means of satellite images, geographic information system and global positioning system techniques, topographic map, climatic data and soil maps, as well as field survey. The resulting outputs were evaluated for their ability to accurately predict the most sensitive and least sensitive areas. The results showed that land cover changes have modified the environment in general and the land degradation and low soil loss processes were identified. The mean soil loss decreased from 9.67 t ha-1 yr-1 in 1987 to 2.67 t ha-1 yr-1 in 2010, as an effect of vegetation gain and particularly the conversion of thousands of square kilometers of Tropophile caatinga middle slope and barren land into Tropophile caatinga plain and Tropophile caatinga high strand. Thus, this study provides insight on territorial ordering and management of environmental services with a regional perspective.
机译：生态环境变化预测模型是决策者的重要决策工具，因为它们有助于量化环境敏感性并了解人类活动与环境质量之间的关系。因此，本文旨在通过卫星图像，地理信息系统和全球定位系统技术，地形图，气候数据和土壤，分析1987年至2010年巴西东北部半干旱地区蒙特罗县的生态环境变化。地图以及实地调查。对所产生的输出进行了准确预测最敏感和最不敏感区域的能力的评估。结果表明，土地覆被变化总体上改变了环境，并确定了土地退化和低土壤流失过程。平均土壤流失量从1987年的9.67 t ha-1 yr-1减少到2010年的2.67 t ha-1 yr-1，这是由于植被的增加，尤其是数千平方公里的Tropophile caatinga中坡和荒芜地的转换所致。降落到Tropophile caatinga平原和Tropophile caatinga高链中。因此，本研究从区域角度为环境服务的区域秩序和管理提供了见识。

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