多方法支持的重庆市土地利用格局时空演化及驱动力

[目的]研究重庆市土利用格局时空演化规律，为促进该地区土地资源可持续利用及社会经济可持续发展提供科学依据。[方法]以位于山地高密度区的重庆市为例，基于1995—2020年土地利用遥感监测数据，从数量结构和空间布局两个方面定量分析重庆市土地利用时空演化特征，并通过地理探测器分析不同时间尺度下重庆市土地利用变化驱动力。[结果]研究期内重庆市土地利用变化速度加快，城乡居民用地、工矿建设用地持续增加，草地面积大幅缩减并集中向林地转化；25 a以来，重庆市土地利用程度逐年提高，整体处于发展期，热点区主要集中在主城及其周围地区；渝西水田密度降低，渝东南林地高值密度面积增加，但草地高值密度区大幅缩减；城镇及农村居民用地高密度核心位于主城区，工矿建设用地高密度核心为星点状分布，增长幅度大；社会经济因素对重庆市土地利用变化影响显著，其中人口密度为主导性因子。[结论]重庆市土地利用变化区域间差异明显，土地利用变化主要受社会经济因素的影响。

Spatio-temporal Evolution and Driving Forces of Land Use Patterns in Chongqing City Supported by Multiple Methods

[Objective] The spatio-temporal evolution of land use patterns in Chongqing City was analyzed in order to provide a scientific basis for promoting the sustainable use of land resources and sustainable social and economic development in the region. [Methods] Remote sensing monitoring data of land use for Chongqing City (located in a mountainous high-density area) from 1995 to 2020 were quantitatively analyzed to determine the spatio-temporal evolution characteristics of land use in Chongqing City from the aspects of quantitative structure and spatial layout. The driving forces of land use change in Chongqing City under different time scales were analyzed by geographical detectors. [Results] The rate of land use change in Chongqing City accelerated during the study period. The land used by urban and rural residents and the land used for industrial and mining construction continued to increase. The grassland area was greatly reduced and concentrated by the conversion to forest land. For 25 years, the degree of land use in Chongqing City has increased year by year, with the entire aera being in the development period. Hot spots of development were mainly concentrated in the main city and its surrounding areas. The density of paddy fields in Western Yuxi District decreased. The high-value density area of forest in Southeast Chongqing City increased, but the high-value density area of grassland decreased significantly. The high-density core of urban and rural residential land was located in the main urban area, and the high-density core of industrial and mining construction land exhibited a sattered distribution having a large growth rate. Socio-economic factors had a significant impact on land use change in Chongqing City, of which population density was the dominant factor. [Conclusion] Regional differences in land use change in Chongqing City were observed over time, and land use change was mainly affected by socio-economic factors.