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| Influence of different slope type on vegetation restoration of expressway |
（1.College of Soil and Water Conservation，Beijing Forest University，100083，Beijing,China；
2.Key Laboratory of Road Traffic Environmental Protection Technology，Ministry of Transport，100088，Beijing,China；
3.State Key Laboratory of Environmental Criteria and Risk Assessment，Chinese Research Academy of Environmental Sciences，100012，Beijing,China） |
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Abstract In order to investigate the vegetation restoration of different slope protection models at the early construction stage, 12 pre-built slopes which are hexagonal tiles (HT) and thick-lift base material and seed spraying engineering protection (TBMSSEP) were divided into two types by cluster analysis with the Sixth Ring Road of West Beijing as research object. This study analyzed the influence of different slope position, slope length, slope aspect and topography on vegetation restoration. The results indicated that: 1) Restoration effects of type Ⅱ which of mainly TBMSSEP was better than type Ⅰ which of mainly HT; 2) Inter-annual change turned out with the succeed procedure at the early stage of vegetation construction, the vegetation restoration effect of 2010 was better than that of 2011; 3) Variation of slope position, slope length and slope aspect caused difference on vegetation community composition. Plants at middle slope grew better than other positions for type Ⅰ while plants at down slope restored better for type Ⅱ. Shady slope with long slope length was in favor of restoration; 4) HT model was more suitable in mountain heavy hilly area while TBMSSEP model was more suitable in plain lightly undulate area.
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Received: 26 November 2012
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