大城市周边农村居民点空间格局演化及其机理——以武汉市江夏区为例

以武汉市江夏区为例,综合运用土地覆盖变化的动态度、核密度、邻近距离测度等方法,定量分析江夏区农村居民点1996、2006及2016年的空间格局演变特征,并识别影响演化的因素。结果表明:大城市周边农村居民点演变剧烈,各街道之间的差异显著,且具有明显的导向性;江夏区农村居民点空间分布从"单点高值集中"向"多点中高值集中"转变,整体呈现"西密东疏"的空间差异;交通的引导作用加强,地形的限制作用减弱;农村居民点呈现明显且强烈的向大城市中心城区聚拢的趋势与特征;中心城市(县城)、中心镇镇区、一般镇镇区周边的农村居民点变化更加明显;社会、空间和经济维度分别对农村居民点演变产生复杂的影响机制。

Spatial pattern evolution and mechanism of rural residential areas around big cities:Taking Jiangxia District of Wuhan as an example

Taking Jiangxia District of Wuhan for example,using the methods of"Dynamic Degree",Nuclear Density and Proximity Distance Measurement of land use and land cover change,this essay quantitatively analyzes the spatial pattern evolution of rural residential areas in Jiangxia District from 1996,2006 and 2016 and identifies the factors that influence evolution.The results show that:The rural residential areas around the big cities have experienced dramatic changes,and the differences between the streets are significant and have obvious orientation;The spatial distribution of rural residential areas in Jiangxia District ranges from"single point high value concentration"to"multiple point medium high value concentration";The transformation shows the spatial difference of"west sparse while east dense";The guiding role of transportation is strengthened,and the limitation of terrain is weakened;Rural residential areas show obvious and strong trends and characteristics of gathering in the central city of big cities;The changes in rural residential areas around the central towns and towns and general towns and towns are more obvious.Finally,the mechanism of the influence of various factors on the evolution of rural settlements is analyzed from the social,spatial and economic dimensions.