The expansion of hydroelectric dams that is planned, and under construction, in the Amazon basin is a proposal to generate “clean” energy, with the purposes of meeting the regional energy demand, and the insertion of Brazil into the international economic market. However, this type of megaproject can change the dynamics of natural ecosystems. In the present article, the spatiotemporal patterns of deforestation according to distance from the reservoir in the vicinity of the lake of Tucuruí, and within a radius of 30 km from it, are analyzed. A linear spectral mixture model of segmented Landsat-thematic mapper (TM), enhanced thematic mapper plus (ETM+), and operational land imager (OLI) images, and proximity analysis were used for the mapping of the land-cover classes in the vicinity of the artificial lake of Tucuruí. Likewise, landscape metrics were determined with the purpose of quantifying the reduction of primary forest, as a mechanism of loss of ecosystem services in the region. These methods were also used for the evaluation of the influence of the distance from the reservoir on the expansion of anthropogenic activities. This methodology was used for the scenarios of pre-inauguration, completion of phase I, beginning of construction phase II, full completion of the Tucuruí hydroelectric project, and the current scenario of the region. The results showed that the highest deforestation rate occurred in the first period of the analysis, due to the areas submerged by the reservoir and due to the anthropogenic disturbances, such as timber extraction, road construction, and the conversion of forests into large areas of agribusiness.

中文翻译：

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图库里大坝建设对森林砍伐的多时间分析

计划在亚马逊河流域扩建计划中和建设中的水力发电大坝，是为了满足区域能源需求以及将巴西纳入国际经济市场而产生“清洁”能源的提议。但是，这种大型项目可以改变自然生态系统的动态。在本文中，根据距图库里湖附近水库的距离以及距图库里30公里半径内的森林，分析了毁林的时空格局。分段Landsat专题测绘仪（TM），增强型专题测绘仪plus（ETM +）和可操作的陆地成像仪（OLI）图像的线性光谱混合模型，以及邻近度分析，用于绘制附近的土地覆盖类别图库里的人工湖。同样 确定景观指标的目的是量化原始森林的减少，以此作为该地区生态系统服务丧失的一种机制。这些方法还用于评估距水库的距离对人为活动扩展的影响。该方法用于以下项目的情景：落成前，第一阶段完成，第二阶段建设开始，Tucuruí水力发电项目全部完成以及该地区的当前情况。结果表明，在分析的第一阶段发生了最高的毁林率，这是由于水库淹没的面积以及人为干扰，例如木材采伐，道路建设以及将森林转变为大型农业综合企业所致。 。