环境约束下的甘肃省城市土地利用效率时空差异及其演进特征

(西北师范大学 地理与环境科学学院, 兰州 730070)

城市土地利用; SBM-Undesirable模型; 动态演进; 甘肃省

Spatial-temporal Differences of Urban Land Use Efficiency and Its Evolution Characteristics Under Environmental Constraints in Gansu Province
ZHU Lixiang, LUO Zhanfu, WANG Qiwen, ZHANG Jin

(College of Geography and Environment Science, Northwest Normal University, Lanzhou 730070, China)

urban land use; SBM-Undesirable undesirable model; dynamic evolution; Gansu Province

备注

为了探究甘肃省城市土地利用效率时空差异和动态演进特征,构建环境约束下的城市土地利用评价指标体系,运用包含窗口的SBM-Undesirable模型和Kernel密度估计测算了2005—2016年环境约束下的甘肃省ULUE时空差异及其演进特征。结果 表明:(1)甘肃省ULUE整体处于中等水平,城市间土地利用效率差异显著,整体呈现上升的趋势;(2)甘肃省ULUE空间分布上具有区域非均衡分布特征,中高效率城市不断增加;(3)甘肃省不同地区ULUE呈现南部民族>河西>陇东>陇中>陇南的区域差异特征;(4)甘肃省城市土地利用技术效率受到两种分解效率的影响,规模效率较纯技术效率对技术效率的贡献度较大;(5)甘肃省ULUE在地域空间上呈现两极分化的特征,区域空间差距呈现“加剧—减缓—加剧”的变化趋势。

In order to explore the spatial-temporal differences and dynamic evolution characteristics of urban land use efficiency in Gansu Province, the evaluation index system of urban land use under environmental constraints was constructed, and the spatial-temporal differences and evolution characteristics of urban land use efficiency was estimated by the SBM-Undesirable model with windows and Kernel density estimation in Gansu Province under environmental constraints from 2005 to 2016. The results showed that:(1)the total urban land use efficiency of Gansu Province was at a medium level, and the difference of land use efficiency between cities was observably remarkable, which showed an overall upward trend;(2)the spatial distribution of urban land use efficiency had distribution characteristics of regional non-equilibrium, and the number of cities with medium and high efficiency increased in Gansu Province;(3)the urban land use efficiency in different regions of Gansu Province presented the regional difference characteristics, which showed the order: the Southern nationalities>Hexi>Longdong>Longzhong>Longnan;(4)the technical efficiency of urban land use in Gansu Province was affected by two kinds of decomposition efficiency, and scale efficiency contributed more to technology efficiency than pure technology efficiency;(5)the efficiency of urban land use in Gansu Province was polarized in regional space, and the regional spatial disparity showed the trend of ‘aggravation—slowdown—aggravation'.