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

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.