摘要
立足丘陵山区农村道路结构功能与布局特点,以重庆市忠县拔山镇为例,研究地貌形态差异显著的地理空间单元农村道路体系空间格局特征及其在海拔高度、坡度、坡向、地形起伏度、地表切割深度、平面变率和剖面变率7个地貌形态要素上的梯度分异效应。结果表明:地势越平坦的地理空间单元农村道路体系结构越均衡、网络效率越高,且区位优势越突出的单元,农村道路网络越发达;农村道路通达弹性大但不同类型道路地形梯度效应既具有差异性又存在一定的关联性。农村道路体系中,生产路所占比例高于机耕道和农村公路,其对地形梯度变化的适宜性相对较强;各地形梯度上生产路、机耕道和农村公路互为补充,具有结构和功能的完整性及其组合效应的叠加性。因此,农村道路体系以一定的结构和功能融于农业自然人文景观,多顺应区域局地微地貌形态而建,在一定程度上,其空间格局受微地貌形态"引导与阻隔效应"甚为显著。
The spatial pattern of rural roads system in hilly area was studied based on the case of Zhongxian County, Chongqing. The effects of geomorphologic factors including altitude, slope, aspect, hypsography, surface cutting depth, slope of slope, and slope of aspect on the pattern were further analyzed. The results showed that：there was significant difference in road quantity distribution, grid characteristics, composition of the different level of rural road in North-West, North-East and South-East in the study area. The composition was rather averaged in the flat area; and in the North-West part with provincial road, the tractor and production road was more developed than those in North-East and South-East. There was also both significant difference and correlations in the gradient of the road composition, quantity and dominant terrain position of rural roads system. Wholly, the quantity of pro- duction road was more than tractor road and provincial road, and the production road was more compatible with the terrain while tractor road and provincial road were more sensitive to the gradient of geomorphologic factors. What＇ s more, the rural roads system consisted of provincial road, tractor road and production road could go through com- plex and diverse landform unites freely. According to their function and spatial sequence, they formed a hierarchi- cal road system to supplement each other. In conclusion, embedded in the complex and diverse landforms and land- scapes with certain spatial order and grid structure, rural roads system in the hilly area of Southwestern China forms linear scenery of the natural system. Not only should it consider the spatial distribution of rural settlements and irri- gation facilities, and the size and shape of cultivated land, but also be harmonized with the agricultural natural and human landscape.
出处
《地域研究与开发》
CSSCI
北大核心
2013年第1期158-164,共7页
Areal Research and Development
基金
国家科技支撑计划项目(2008BAD98B02)
西南大学研究生科技创新基金项目(kb2011012)
关键词
机耕道
生产路
农村公路
空间格局
地形梯度
拔山镇
忠县
tractor road
production road
provincial road
spatial pattern
the terrain gradient
BashanTown
Zhongxian County
