川中丘陵区小流域道路特征研究——以盐亭县林山乡西沟小流域为例

Study on Road Characteristics in Watershed of Central Sichuan Hilly Areas

基于对川中丘陵区盐亭县林山乡西沟小流域田间道路的外业调查数据,利用GIS空间分析方法研究了流域内各级道路的分布规律。结果表明:林山乡小流域的道路总共可以分为4种等级,包括干道、田间道、生产路和支路;各级道路总长度都随级别增大而减少,且累计总长度与道路级别线性相关,道路长度则随道路级别增大而减小;道路网系和流域水系在结构规律上具有一定的相似性;不同级别道路分布范围受地形和人类活动的影响;爬坡道路坡度与地形坡度之间存在线性回归关系,且次级道路分布受主路控制。

According to the field investigation data of roads in watershed of Linshan Village,Yanting County in central Sichuan hilly areas,the distribution rules of roads in the watershed were studied by GIS spatial analysis.As indicated by the results,the roads in Linshan watershed can be graded into four levels,including main road,field road,production road and branch road;the higher the level,the less the total length of roads,the total length is linearly correlated with the level of roads.The road network system and water system share some similarity in their structure and distribution rules;the distribution of different levels of road is influenced by topography and human activities;there is a linear regression relationship between the climbing road slope and terrain,and the distribution of secondary roads is controlled by the main road.