Abstract

In Brazil, as in the world, the mining sector is expanding steadily. Currently, the sector accounts for 11.5% of Brazil’s GDP, and the country is the world’s fifth-largest producer of mining products. The environmental impacts of mining and other activities that compete for land use need to be evaluated. The objective of this work was to assess vegetation recomposition in an area where bauxite extraction occurred, using analysis of a vegetation index calculated from satellite images. The method was applied at a bauxite mine in Paragominas, Pará, Brazil. The evaluations covered the steps of opening the area, mining operations, and replanting, considering three types of replanting: natural regeneration, traditional planting, and nucleation, for the period between 2013 and 2019, using 2006 as the base situation for the secondary forest. The results showed that the replanting method directly influences the vegetation index according to satellite images. Several factors affected the values obtained, such as operational factors and topsoil used. The natural regeneration method was found to produce the best results.

Graphic abstract

中文翻译：

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利用卫星图像评估热带森林中植被重建方法

摘要

与世界一样，在巴西，采矿业也在稳定增长。目前，该行业占巴西GDP的11.5％，该国是世界第五大矿业产品生产国。需要评估采矿和其他竞争土地使用活动的环境影响。这项工作的目的是通过对根据卫星图像计算出的植被指数进行分析，评估铝土矿提取发生地区的植被重建。该方法在巴西帕拉戈米纳斯的铝土矿中使用。评估涵盖了开放区域，采矿作业和补植的步骤，其中考虑了三种补植：自然再生，传统种植和成核，2013年至2019年以2006年为次生林的基本情况。结果表明，补植方法根据卫星图像直接影响植被指数。几个因素会影响获得的值，例如操作因素和使用的表土。发现自然再生方法可产生最佳效果。

图形摘要