长江经济带土地利用冲突时空演变与影响因素——基于景观格局与功能协调的视角

Spatio-temporal evolution and influencing factors of land use conflicts in the Yangtze River economic belt ——from the perspective of landscape pattern andfunctional coordination

  • 摘要: 长江经济带作为我国人口密集、经济活跃、生态敏感的战略区域,土地利用冲突对流域可持续发展构成重大挑战.本研究基于景观格局与功能协调视角,构建土地利用冲突识别框架,分析2005—2020年长江经济带土地利用冲突的时空分异特征,并采用时空地理加权回归模型探究其影响因素.结果表明:1)2005—2020年长江经济带土地利用冲突省际差异较大,呈“东西高、中部低、沿江集聚”的梯度格局,上游地区以结构冲突为主,下游地区以功能冲突为主;2)长江经济土地利用冲突呈上升趋势,且重心向东北方向迁移,成渝城市群与长三角地区冲突加剧,但西南山区部分冲突有所缓解;3)年均温、坡度、城镇化率为主要正相关因子,高程和污水处理率为主要的负相关因子;4)长江经济带土地利用冲突主导驱动因子具有空间差异.基于此,提出区域差异化调控、动态监测及省际协同等策略,为长江经济带土地资源合理利用与可持续发展提供科学依据.

     

    Abstract: The Yangtze River economic belt, as a strategic area with dense population, active economy and sensitive ecology in China, poses a major challenge to the sustainable development of the basin due to land use conflicts. Based on the perspective of landscape pattern and functional coordination, this study constructed a LUC framework for land use conflict identification, analyzed the spatio-temporal differentiation characteristics of land use conflicts in the Yangtze River economic belt from 2005 to 2020, and adopted the spatio-temporal geographic Weighted Regression (GTWR) model to explore its influencing factors. The results show that: 1) From 2005 to 2020, the inter-provincial differences in LUC of the Yangtze River economic belt were significant, presenting a gradient pattern of "high in the east and west, low in the middle, and concentrated along the river". Moreover, the upper reaches were mainly characterized by structural conflicts, while the lower reaches focused on functional conflicts. 2) The LUC of the Yangtze River Economic Belt shows an upward trend, and the center of gravity shifts towards the northeast. The conflicts between the Chengdu-Chongqing urban agglomeration and the Yangtze River Delta region have intensified, but some conflicts in the mountainous areas of southwest China have eased to some extent. 3) The annual average temperature, slope and urbanization rate are the main positive correlation factors, while elevation and sewage treatment rate are the main negative correlation factors. 4) The dominant driving factors of LUC in the Yangtze River economic belt have spatial differences.Based on this, strategies such as regional differentiated regulation and control, dynamic monitoring and inter-provincial coordination are proposed to provide a scientific basis for the rational utilization and sustainable development of land resources in the Yangtze River economic belt.

     

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