耦合视角下甘肃省县域乡村“三生”功能协调度的时空跃迁特征与影响因素

Spatial and temporal transition characteristics and influencingfactors of“production-living-ecological”functions of ruralareas at county level in Gansu provincefrom the perspective of coupling

探究乡村“三生”功能协同发展水平,揭示其演化进程中耦合协同关系的时空跃迁特征及影响因素,将有利于优化乡村地域功能空间格局及开创新时代乡村发展新局面。基于1998—2020年甘肃省86个县域研究单元,构建乡村生产-生活-生态功能综合评价指标体系,运用耦合协调度模型、LISA时间路径、LISA时空跃迁及参数最优地理探测器等方法,探究县域乡村“三生”功能耦合协调发展水平、时空跃迁特征及影响因素。结果表明:(1)县域乡村“三生”功能耦合协调度总体上呈现出不断增长的发展态势,逐步向良性、有序方向不断迈进,但耦合协调度数值整体较低且发展速度相对较为缓慢。2013年后耦合协调状态由严重失调状态转为基本失调状态的县域比例快速增加。(2)整体来看,全省中间区域县域乡村“三生”功能耦合协调度的局部空间结构更加具有稳定性,而陇东南地区和酒泉市县域空间结构更加具有动态性。LISA时间路径弯曲度呈现西北地区向东南地区增大趋势。各县域研究单元耦合协调度的局部空间关联格局保持较为稳定,其时空跃迁具有相对较强的路径锁定。(3)经济发展对耦合协调度提升具有重要影响作用,城镇辐射对耦合协调度的提升具有明显促进作用。经济发展与其他因子的共同作用直接影响到耦合协调度的提升,根植于自然本底条件的其他诸如社会经济条件与区位交通条件等因素是作用于乡村“三生”功能耦合协调发展的驱动性重要条件。

Exploring the level of coordinated development of the rural“production-livingecological”functions,revealing the spatiotemporal leap characteristics and influencing factorsof the coupling coordination relationship in its evolution process will help optimize the spatialpattern of rural regional functions and creat a new era of rural development.Based on 86county research units in Gansu province from 1998 to 2020,this paper constructs acomprehensive evaluation index system for rural“production-living-ecological”functions,anduses the coupling coordination degree model,LISA time path,LISA spatiotemporal leap,andparametrically optimal geo-detector methods to explore the coupling coordination developmentlevel,spatiotemporal leap characteristics and influencing factors of the rural“production-livingecological”functions.The results show that:(1)The coupling coordination degree of rural“production-living-ecological”functions at county level shows a growing development trend,gradually moving towards a benign and orderly direction,but the coupling coordination degreevalue is relatively low and the development speed is relatively slow.After 2013,the proportionof counties with coupling coordination state changed from serious misalignment to basicmisalignment state increased rapidly.(2)On the whole,the local spatial structure of thecoupling coordination degree of rural“production-living-ecological”functions in the middleregion is more stable,while the southeast Gansu and Jiuquan city is more dynamic.Thecurvature of LISA time path shows an increasing trend from northwest to southeast in Gansu.The local spatial correlation pattern of the coupling coordination degree of each countyresearch unit remains relatively stable,and its spatial and temporal transition has relativelystrong path locking.(3)Economic development has an important effect on the improvement ofcoupling coordination degree,and urban radiation has an obvious promoting effect on theimprovement of coupling coordination degree.The joint action of economic development andother factors directly impact the improvement of the coupling coordination degree.Otherfactors rooted in the natural background,such as socioeconomic conditions and location trafficconditions,are the basis for realizing the coupling coordination development of rural“production-living-ecological”functions.