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首页> 外文期刊>Journal of Cleaner Production >Tempo-spatial changes and main anthropogenic influence factors of vegetation fractional coverage in a large-scale opencast coal mine area from 1992 to 2015
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Tempo-spatial changes and main anthropogenic influence factors of vegetation fractional coverage in a large-scale opencast coal mine area from 1992 to 2015

机译：1992-2015年大型露天煤矿区植被覆盖度的时空变化及主要人为影响因素

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The surface soil and vegetation had been destroyed by opencast mining, leading the decrease of the vegetation fractional coverage, which caused a severe damage to the mining area and ecosystems. However, land reclamation in mining area minimized the damage to the environment and was an important part of mine production and construction to improve the vegetation fractional coverage and restore the local ecological balance. To analyze the effects of anthropogenic activities on vegetation, the vegetation fractional coverage (VFC) and vegetation index (VI) of the whole Pingshuo opencast coal mine area from Shanxi province of China and four individual reclaimed dumps in this coal mine area were calculated respectively based on remote sensing images. The spatial distribution of vegetation fractional coverage was analyzed using Moran's Index. From 1992 to 2015, the vegetation fractional coverage of the whole coal mine area increased from 0.31 to 0.53, showing a benign development trend with significant change from 2000 to 2015, and it was the lowest in 2009. Moreover, The vegetation fractional coverage transformed from extremely low coverage, low coverage, to middle coverage, middle high coverage, and high coverage during 23 years, which was improved clearly. The long reclamation period is conducive to vegetation restoration, and the reclamation project has a direct effect and significance for the restoration of the ecological environment of the mining area. The vegetation fractional coverage of four dumps in the study area were the lowest at the initial reclamation time, and increased with increasing reclamation time. The vegetation coverage of the Southern dump, Western A dump, Inner dump and Western B dump increased from 0.29 to 0.68, 0.34 to 0.59, 0.5 to 0.76, and 0.46 to 0.54, respectively. The increase of the global Moran's Index from 0.80 to 0.91 indicated that the spatial agglomeration was greatly influenced by anthropogenic activities from 1992 to 2015. The local Moran's Index showed that the vegetation fractional coverage of the whole stage was mainly high-high clustering and low-low clustering in 2015, and the vegetation fractional coverage of the dumping sites changed from the original low-low clustering to high-high clustering from 1992 to 2015. The area was heavily affected by both mining and reclamation, the vegetation fractional coverage of the dump site was significantly improved after reclamation. (C) 2019 Elsevier Ltd. All rights reserved.
机译：露天开采破坏了表层土壤和植被，导致植被覆盖率降低，对矿区和生态系统造成了严重破坏。然而，矿区的土地开垦使对环境的破坏最小化，并且是矿山生产和建设中提高植被覆盖率和恢复当地生态平衡的重要组成部分。为了分析人为活动对植被的影响，分别计算了山西省平朔露天煤矿区的植被覆盖度（VFC）和植被指数（VI），并分别计算了该煤矿区的四个个体填埋场。在遥感影像上。利用莫兰指数分析了植被覆盖度的空间分布。从1992年到2015年，整个煤矿区的植被覆盖度从0.31增加到0.53，呈现出良性的发展趋势，从2000年到2015年发生了显着变化，并且在2009年是最低的。在23年中，极低的覆盖率，低覆盖率，中覆盖率，中高覆盖率和高覆盖率得到了明显改善。复垦期长有利于植被恢复，复垦工程对矿区生态环境的恢复有着直接的作用和意义。研究区四个垃圾场的植被覆盖率在初始开垦时间最低，并随开垦时间的增加而增加。南部垃圾场，西部A垃圾场，内部B垃圾场和西部B垃圾场的植被覆盖率分别从0.29增加到0.68、0.34增加到0.59、0.5增加到0.76和0.46增加到0.54。全球Moran指数从0.80增加到0.91表明，从1992年到2015年，人为活动对空间集聚影响很大。局部Moran指数表明，整个阶段的植被覆盖度主要是高-高聚类和低-高。在2015年低聚类，并且从1992年到2015年，倾倒场的植被分数覆盖率从原始的低-低聚类变为高-高聚类。该区域受采矿和填海的影响很大，垃圾场的植被分数覆盖率填海后该部位明显改善。 （C）2019 Elsevier Ltd.保留所有权利。

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