Definition and Spatial Differ entiation of Road- effect Zone: A Case Study in Longitudinal Range- Gorge Region
道路影响域的界定及其空间分异规律 ———以纵向岭谷区为例

Taking road network in Longitudinal Range-Gorge Region(LRGR) as an case study,we got the bound of road-effect zone through overlay method of GIS considering its influencing factors.Then we calculated the percentage of road-effect zone area in certain region and study the spatial variability in LRGR.Further,road density,population density,village number,ecological capacity and average altitude were selected to analyze their relationship with road effect zone.The results showed that different road types had various road-effect zones.Spatial contribution of road effect showed a great regional difference.The effect zone decreased from Kunming to region around.Honghe River Valley had a higher value than Lancang and Nujiang River Valley.In LRGR,there showed significant spatial convergence region in east,north and south-west of LRGR.Correlation analysis showed that there existed significant correlation between road-effect proportion and road density,population density,village number,ecological capacity while no correlation with average altitude.