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冰川冻土  2014 

青藏公路工程活动对沿线植被覆盖的影响

DOI: 10.7522/j.issn.1000-0240.2014.0123, PP. 1017-1025

Keywords: 青藏公路,植被变化,植被自我恢复

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Abstract:

利用2000-2012年的MODIS增强植被指数(EnhancedVegetationIndex,EVI)数据,结合研究区3个气象台站长期的气象数据,分析了青藏公路沿线植被变化总体趋势,以及不同整修措施对周边植被覆盖带来的不同影响.通过实地考察,选取了16个受工程活动影响的典型路边样方,3个铁路边样方和8个远离公路铁路的自然样方,对比路边和自然样方,分析植被的自我恢复能力以及4个主要影响因子.结果表明青藏公路沿线植被覆盖变化是在整个气候变化的背景下,叠加了工程活动的影响.植被的恢复能力与其所在路段的地形、植被覆盖度、气候条件、以及工程活动的强度均有关系,抑制植被生长的因素越多,植被恢复越慢.

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