黄河流域城镇化与耕地利用生态效率的耦合协调度评价、时空特征及驱动因素

    Coupling coordination evaluation, spatiotemporal characteristics and driving factors between urbanization and cultivated land use ecological efficiency in the Yellow River Basin

    • 摘要: 城镇化与耕地利用存在复杂、动态关系,揭示城镇化与耕地利用生态效率之间的耦合协调关系变化及其驱动因素对于推动城镇化高质量发展和耕地可持续利用具有重大意义。基于2005—2020年黄河流域88个地级市(州、盟)的统计数据,采取综合评价法、SBM-Undesirable模型和耦合协调度模型分别测算黄河流域城镇化发展水平、耕地利用生态效率水平以及二者耦合协调度,在分析各自时空演变特征的基础上进一步运用空间自相关模型和地理探测器对二者耦合协调度进行空间关联分析和驱动因素分析。结果表明:1)2005—2020年黄河流域城镇化发展水平稳步提升但空间分异特征愈发明显,黄河下游沿岸以及中上游偏北地区逐渐成为城镇化发展第一梯队;2005—2020年黄河流域耕地利用生态效率显著提升,局部地区呈现出“中间高四周低”的不平衡特征,但区域间差距在逐渐缩小。2)2005—2020年黄河流域城镇化与耕地利用生态效率耦合协调度持续上升但未达到高级协调水平,空间分布上“东高西低”的极端态势逐渐演化为多中心的“中间高四周低”的差异格局,整体空间差异逐渐缩小;二者耦合协调度主要存在“高-高”集聚和“低-低”集聚两种类型,前者主要集中在山东、河南等下游地区,后者主要集中于以甘肃为主的上游地区。3)2005—2020年黄河流域城镇化与耕地利用生态效率耦合协调度受到耕地经营规模、农户收入水平、政府农业支持力度、高程、年均降水量和年均气温等因素的影响,且各驱动因素间存在非线性增强和双因子增强的交互作用效果。

       

      Abstract: Urbanization and cultivated land use have presented a complex and dynamic relationship. This study aims to reveal the coupling and coordination relationship between urbanization and cultivated land use ecological efficiency, together with the driving factors behind it. The statistical data was collected from the 88 prefecture-level cities (states and leagues) in the Yellow River Basin from 2005 to 2020. The comprehensive evaluation was then adopted to measure the urbanization development level using the SBM-Undesirable model, and the coupling coordination degree model. The cultivated land use ecological efficiency and the coupling coordination degree were achieved after evaluation. The results show that: 1) The development level of urbanization increased steadily, but there was a much more outstanding feature of spatial differentiation. The first echelon of urbanization was gradually distributed in the downstream coast of the Yellow River, the middle and upper reaches of the northern part of the Yellow River; The ecological efficiency of cultivated land use was significantly improved with the imbalance of high in the middle and low in the surroundings in the local areas. 2) It continued to rise the coupling coordination degree between urbanization and cultivated land use ecological efficiency. But there was no reach in the advanced level of coordination. The extreme situation of 'high in the east and low in the west' in the spatial distribution gradually evolved into the polycentric high in the middle and low in the surroundings pattern of differences. The overall spatial differences were gradually narrowing to evolve into the high in the middle and low in the surroundings pattern. Two types of coupling coordination were the high-high and low-low agglomeration. Among them, the high-high agglomeration was concentrated mainly in the downstream areas, such as Shandong and Henan Provinces. While the low-low agglomeration was mainly concentrated in the upstream areas of Gansu Province. 3) There were the influencing factors on the coupling coordination degree between urbanization and cultivated land use ecological efficiency, such as the scale of cultivated land operation, the income level of farmers, the government's agricultural support, the elevation, the average annual precipitation, and the average annual temperature. There was a non-linear and two-factor enhancement of the interaction among the driving factors. Therefore, much effort should be continued to narrow the gap between the development level of urbanization and the cultivated land use ecological efficiency among regions. In addition, breakthroughs and upgrades should be promoted in the level of coordination between urbanization and the cultivated land use ecological efficiency. The demonstration and leadership were found in the high-high agglomeration areas. Finally, it is necessary to take the regional background as the primary determinant of urbanization development and arable land use. While the interaction and complementary enhancement of each factor can be fully considered to synergistically improve the coordinated development of regional urbanization and arable land use.

       

    /

    返回文章
    返回