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武汉都市圈城乡结合部耕地利用韧性评估与分区治理

Assessment and Zoning Governance of Cultivated Land Use Resilience in the Urban-Rural Fringe of the Wuhan Metropolitan Area

  • 摘要: 准确识别快速城镇化背景下城乡结合部耕地利用韧性的时空分异、驱动机制及治理重点,对于提升耕地保护与分区治理的针对性具有重要意义。该研究以武汉都市圈城乡结合部为研究区,构建“抵抗力—适应力—恢复力”耕地利用韧性评价体系,结合地理加权回归、局部空间自相关和模糊集定性比较分析等方法,解析2012—2022年耕地利用韧性的时空演变、驱动机制与分区治理路径。结果表明:1)研究区耕地利用韧性总体处于中高水平,但呈明显下降趋势,均值由0.79降至0.65,高韧性区占比由84.67%降至27.50%,空间上表现为近郊低值集聚增强、远郊相对稳定;2)驱动因子具有显著空间异质性,近郊区域主要受POI密度、人口密度等社会经济因素影响,远郊区域更多受降水、地下水埋深等自然资源条件约束,地表水可获得性在整体上作用显著,但在局部尺度上未表现为首位约束因素;3)高韧性生成表现出明显组态特征,可归纳为水土资源禀赋型、近郊生态嵌合型、社会适应与反哺型、丘陵雨养保育型4类路径。研究表明,武汉都市圈城乡结合部耕地利用韧性具有显著时空分异和多路径生成特征,应依据不同区域主导约束实施差异化分区治理。

     

    Abstract: Rapid urbanization has intensified land-use competition, landscape fragmentation, and ecological pressure in urban-rural fringe areas, making it necessary to evaluate how cultivated land maintains production functions under multiple disturbances and to translate the diagnosis into spatially differentiated governance. This study took the urban-rural fringe of the Wuhan Metropolitan Area as the research object. The fringe was delineated by clustering the intensity and spatial fluctuation of nighttime-light data, and 4,775 valid grids of 1 km × 1 km were established as the basic evaluation units. A cultivated land use resilience framework was constructed from resistance, adaptability, and recovery. Resistance described the stability of root-zone soil moisture, crop evapotranspiration, and terrain conditions; adaptability reflected landscape connectivity, market accessibility, construction-land pressure, and production-use stability; and recovery represented the response to extreme drought. Entropy weighting was applied to a pooled two-year sample to calculate comparable resilience scores for 2012 and 2022. Local spatial autocorrelation analysis identified spatial clusters and outliers, geographically weighted regression revealed spatially varying effects, and fuzzy-set qualitative comparative analysis identified county-level configurations associated with high resilience. The results showed that cultivated land use resilience remained generally at a medium-to-high level but declined substantially during 2012–2022. The mean score decreased from 0.79 to 0.65, and the proportion of high-resilience grids fell from 84.67% to 27.50%. High-value areas contracted toward relatively continuous outer-suburban agricultural spaces, whereas low-value clusters expanded around the main urban area, development corridors, and urban expansion fronts. Global Moran’s I decreased from 0.26 to 0.24, indicating that positive spatial autocorrelation persisted while overall clustering weakened slightly. The driving effects were markedly spatially non-stationary. Compared with the global ordinary least squares model, the geographically weighted regression model increased the adjusted coefficient of determination from 0.444 to 0.625 and reduced the corrected Akaike information criterion from 10,755.08 to 9,488.99. Population density and point-of-interest density exerted stronger negative effects in the inner fringe and along the Wuhan–Ezhou–Huangshi development corridor, where construction encroachment and land-use competition were concentrated. In outer-suburban and hilly agricultural areas, precipitation and groundwater depth became more important because direct urban pressure weakened and water availability increasingly constrained crop physiological stability. Surface-water accessibility was significant in the global model but seldom became the strongest local constraint. Proximity to rivers and lakes captured regional differences in potential water availability, whereas its effective contribution to field production was conditioned by plot fragmentation, irrigation and drainage connectivity, and local water-use organization. No single antecedent condition was necessary for high resilience. Eight effective configurations were identified, with an overall solution consistency of 0.9146 and coverage of 0.7021. According to their dominant condition combinations and regional contexts, the configurations were summarized as four modes: water-soil resource endowment, suburban ecological mosaic, social adaptation and feeding-back, and hilly rain-fed conservation. These modes show that high resilience can be maintained through different combinations of development intensity, population pressure, urban location, precipitation, groundwater depth, and surface-water proximity. By integrating resilience level, local spatial association, dominant constraints, and configurational pathways, the study area was divided into core protection, pressure regulation, endowment enhancement, and risk warning zones. The corresponding priorities are to maintain contiguous high-resilience farmland, control construction encroachment and repair fragmented landscapes, improve water conservation and irrigation conditions according to local natural constraints, and establish dynamic monitoring for transitional areas. The findings demonstrate that cultivated land use resilience in urban-rural fringe areas is jointly shaped by spatially differentiated pressures and multiple conditional pathways. Linking grid-scale diagnosis with county-level implementation can improve the territorial precision and practical operability of cultivated land protection.

     

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