京津冀地区新型城镇化对土地生态效率影响的实证分析

近年来, 城市化进程的不断推进对城市土地利用及生态环境产生了极大影响。选取城镇化发展最为迅速与典型的京津冀地区作为研究区域, 采用超效率DEA模型及Malmquist效率指数, 从经济学角度分析2006-2015年土地生态效率的时空演变, 随后, 基于人口、富裕和技术(STRIPAT)模型, 构建新型城镇化发展水平的综合指标评价体系, 分析新型城镇化对土地生态效率的影响。研究结果表明: 京津冀地区城镇化发展水平与土地生态效率之间存在显著的正相关关系, 即城镇化水平的不断提升对土地生态效率的提高具有积极作用, 各城市土地生态效率在新型城镇化发展背景下存在明显的空间差异, 此外, 土地利用与管理技术水平的提高、环境政策的改变等均会对土地生态效率的提升产生积极影响。这项研究旨在为提高城市土地管理水平, 推动城市可持续发展提供决策支持。

Positive analysis of the effect of new-type urbanization on land eco-efficiency in the Beijing-Tianjin-Hebei region

In recent years,the continuous progress of urbanization has a great impact on urban land use and ecological environment.In this paper,we applied a Super Efficiency DEA model and Malmquist Index to measure the land eco-efficiency of 13 prefecture-level cities in the Beijing-Tianjin-Hebei region from 2006-2015 in a perspective of economic.Then,we built an indicator system to evaluate the new-type urbanization and quantify the impacts of new-type urbanization on land eco-efficiency based on an extended Stochastic Impacts by Regression on Population,Affluence and Technology(STIRPAT)Model.Our results reveal that there is a positive correlation between the development level of urbanization and the land eco-efficiency in the Beijing-Tianjin-Hebei region,that is,the continuous improvement of the urbanization level has a positive effect on the improvement of the ecological efficiency of urban land.There are distinct differences among cities that are closely related in terms of their development stage of new-type urbanization.Enhancing technology,as well as modifying policies for environment management,will also help improve intensive land use and land eco-efficiency.Our paper provides a significant contribution to strengthening land-use management and advancing sustainable urban development in China.