School of Land Science and Technology, China University of Geosciences, Beijing, 100083, China.
Key Lab of Land Consolidation, Ministry of Land and Resources of the People's Republic of China, Beijing, 100035, China.
Environ Monit Assess. 2019 Jan 31;191(2):120. doi: 10.1007/s10661-019-7250-5.
Scientifically determining the characteristics of arable land use in different regions is significant in promoting arable land protection. Most studies on the changes in arable land focus on an isolated analysis of the impact of urban development on arable land. Studies on the influence mechanism of regional spatial forces in different cities from the macro perspective are limited. A gravity model and ArcGIS spatial analysis methods were used to analyze the characteristics and driving mechanisms of arable land changes in different urban function orientations from the perspective of interregional economic interaction. We hope to provide guidance for the establishment of arable land protection in a similar city circle. The results indicated the following: (1) During the study period, the geographic range of arable land with strong dynamic changes (average annual change exceeding 1.5%) gradually widened from the core area to the surrounding area, while the annual change rate decreased. (2) There is a strong correlation between the change in arable land use and the scope of gravitational action. The dynamic changes in arable land in areas with strong gravitational relationships with the core area are strong, while in the weak gravitational areas that are less affected by the core area, the average annual rate of change is nearly below 1%. (3) In the 10-year study period, the overall changing trend of the radiation circle in the core area expanded. The gravitational value where the breaking point falls within its own administrative division is more related to the change of its arable land area, and the greater the gravitational attraction is, the more likely the correlation. In a city circle, it is essential to both protect arable land resources and promote coordinated economic development. Future research on arable land utilization in different city circles should consider overall area development. Different functional areas can be determined by calculating the gravitational value, then regional development potential and key development types can be determined, and arable land protection measures can be optimized based on these functional areas.
科学确定不同区域耕地利用特征，对促进耕地保护具有重要意义。大多数耕地变化研究集中于孤立分析城市发展对耕地的影响。从宏观角度研究不同城市区域空间力量的影响机制的研究较少。本文运用引力模型和 ArcGIS 空间分析方法，从区域经济相互作用的角度，分析不同城市功能定位下耕地变化的特征和驱动机制，以期为类似城市圈耕地保护制度的建立提供指导。结果表明：（1）研究期间，强动态变化（平均年变化超过 1.5%）耕地的地理范围逐渐从核心区向周边地区扩展，而年变化率逐渐降低。（2）耕地利用变化与引力作用范围之间存在很强的相关性。与核心区具有强引力关系的区域，耕地动态变化强烈，而受核心区影响较弱的弱引力区域，平均年变化率接近 1%。（3）在 10 年的研究期间，核心区辐射圈的整体变化趋势扩大。断裂点落在自身行政区域内的引力值与耕地面积变化更相关，引力吸引力越大，相关性越大。在城市圈中，保护耕地资源和促进协调经济发展同样重要。未来不同城市圈耕地利用研究应考虑整体区域发展。可以通过计算引力值来确定不同的功能区域，然后确定区域发展潜力和关键发展类型，并根据这些功能区域优化耕地保护措施。
