1995-2015年贵阳市土地城镇化变化梯度特征

Gradient Characteristics of Land Urbanization Change in Guiyang City from 1995 to 2015

基于1995和2015年Landsat TM/ETM+遥感影像,利用ArcGIS软件,从地形梯度和社会经济梯度两方面,分析1995-2015年贵阳市土地城镇化变化的梯度特征.结果表明:1995-2015年贵阳市土地城镇化整体呈增加趋势;随着地形起伏度和地形位梯度增加,贵阳市土地城镇化由上升转为下降;在交通、人口密度、城乡的大部分梯度上,贵阳市土地城镇化均表现为上升趋势.贵阳市山地地形限制了土地城镇化在地形起伏度和地形位较高梯度上的扩张,而社会经济梯度的吸引力不同导致土地城镇化变化在各梯度上存在差异.

We analyzed the gradient characteristics of land urbanization change in Guiyang city from 1995 to 2015 from two aspects of terrain gradient and socio-economic gradient with the help of ArcGIS software based on Landsat TM/ETM+remote sensing images in 1995 and 2015.The results showed that the land urbanization of Guiyang city represented an increasing trend as a whole from 1995 to 2015.The land urbanization of Guiyang turned from rising to falling with the increase of topographic relief degree and topographic gradients.The land urbanization in Guiyang city showed an upward trend in the most gradients of transportation,population density and urban-rural levels.The mountainous terrain of Guiyang city limits the expansion of land urbanization on the relatively high gradient of topographic fluctuation and topographic position,while the different attractions of social and economic gradient leads to the difference of land urbanization change on each socio-economic gradient.