基于RV指数的道路网络干扰效应空间分异研究——以云南省纵向岭谷区为例

Spatial Differentiation Analysis of Disturbance Effect of Road Network Based on RV Index:A Case Study in Longitudinal Range-Gorge Region

不同尺度下道路网络干扰效应空间分布差异研究及其驱动因子识别,对进一步研究道路网络引起的生态系统演变具有重要意义。利用表示道路网络干扰效应的RV(Roadless Volume)指数,以云南省纵向岭谷区为案例区,在不同尺度上分析了道路网络干扰效应的空间分布差异。结果表明,云南省纵向岭谷区道路网络干扰效应总体呈现中部高、两边低的趋势:地州及县域尺度上,干扰效应主要集中在昆瑞公路沿线的地州及县市;流域内部分区尺度上,各个流域的中下游地区干扰效应较强;流域尺度上,红河流域相比其他流域干扰效应强。进一步的相关性分析表明,道路网络干扰效应受生态承载力、道路密度和海拔高度等因素的驱动。

Study on the spatial distribution of disturbance effect of road network at multiple scales and recognize the driving forces are important for further studies on ecosystem evolution.In this paper,the disturbance effect of road network was analyzed based on RV（Roadless Volume） index in Longitudinal Range-Gorge Region at multiple scales.The results showed that the disturbance effect was generally higher in the middle and lower in the south and north.The drastic disturbance mainly distributed in the regions which are along Kunrui Road from Kunming to Ruili at county and prefecture scale,in midstream and downstream at subarea of valley scale,and along Red River at valley scale.Further correlation analysis showed that the disturbance distribution was associated with ecological capacity,road density and average altitude evidently.