Spatial Pattern Evolution and Casual Analysis of County Level Economy in Changsha-Zhuzhou-Xiangtan Urban Agglomeration, China

In order to evaluate whether or not the county units′ economy in the Changsha-Zhuzhou-Xiangtan(Chang-Zhu-Tan) Urban Agglomeration was growing as expected, this study analyzed the spatial economy pattern at county-level by using the Exploratory Spatial Data Analysis(ESDA) method. In this process, the global Moran′s I and local Getis-Ord G*i indexes were employed to analyze indicators including per capita GDP and three industrials(i.e. primary, secondary and tertiary industry) from 2000 to 2010. The results show that: 1) the county units′ economy in the Chang-Zhu-Tan Urban Agglomeration has exhibited a strong spatial autocorrelation and an accelerated integration trend since 2008(Moran′ s I increased from 0.26 to 0.56); 2) there is a significant difference in economy development between the northern and southern county units in the Chang-Zhu-Tan Urban Agglomeration: the hotspot zone with high economic level was formed among the northern county units whereas the coldspot zone with low economic level was located in the southern areas. This difference was caused primarily by the increasingly prominent economic radiation effect of Changsha ′upheaval′; 3) town density, secondary industry, and the integration policy are the major contributors driving the evolution of the spatial economy pattern in the Chang-Zhu-Tan Urban Agglomeration.

Spatiotemporal Measurement of Regional Expansion in Changsha-Zhuzhou-Xiangtan Metropolitan Area Based on Nighttime Light Data

The research purpose is to accurately reveal the temporal and spatial law of the urban expansion of Changsha-Zhuzhou-Xiangtan, one of the seven major urban agglomeration areas in China, and provide decision-making basis for the future urban construction land layout and regional development policy-making. Based on the night lighting data (DMSP/OLS), this paper extracts the boundary of the urban construction land of Changsha-Zhuzhou-Xiangtan urban agglomeration from 1993 to 2017, and quantitatively studies the spatial and temporal characteristics of the expansion of the metropolitan area in the past 25 years according to the methods of spatial expansion analysis, center of gravity migration measurement, landscape pattern index, spatial autocorrelation, etc. The results show that: 1) it is scientific and feasible to extract urban agglomeration construction land by the method of auxiliary data comparison for the study of urban expansion;2) the expansion of regional space in Changsha-Zhuzhou-Xiangtan metropolitan area shows a trend of “weakening first and strengthening later”. The construction land keeps increasing, and the expansion form gradually changes from extensive type to intensive type;3) the center of gravity of the metropolitan area fluctuated and repeated in part during the past 25 years, but it was always located in the municipal district of Changsha city. The eastern region, mainly Changsha city, was still the core area of urban agglomeration expansion;4) strengthening the territorial space protection and control of ecological green core in the metropolitan area is a key measure for the high-quality development of urban agglomeration.

基于Markov-PLUS模型的长株潭城市群建设用地扩张模拟及碳排放响应分析

在双碳目标和新型城镇化背景下,保证经济平稳增长的同时减少碳排放是实现城市高质量发展的重要任务之一,更是长沙、株洲、湘潭等国家低碳试点城市重点建设目标之一。因此以长株潭城市群中用地变化和碳排放最为剧烈的中心城区作为研究区域,在现状分析的基础上运用Markov-PLUS耦合模型和碳排放响应模型,模拟了自然状态发展情景、耕地保护发展情景、生态保护发展情景和绿色低碳发展情景下建设用地扩张及碳排放响应情况。结果表明:①2000—2020长株潭城市群建设用地面积呈现阶段性的波动增长趋势,耕地和林地是其主要来源,扩张强度在2010—2015年最大,主要集中在城市群中心区域;碳排放量呈现倒“V”型曲线,可以划分为碳排放量快速上升阶段(2000—2005年)和碳排放量下降阶段(2005—2020年),以2010年为节点,下降幅度先增加后减缓;二者之间存在较为密切的正相关关系,整体表现为建设用地面积增加(减少)碳排放随之增加(减少)的较强扩张与较高排放模式。②Markov-PLUS模拟结果显示,长株潭城市群建设用地在自然状态发展情景下扩张面积最大(235.9503km^(2)),在生态保护发展情景下扩张面积最小(200.6354km^(2));绿色低碳发展情景下建设用地扩张所占用的生态碳汇面积相对较少(169.78km^(2)),占未利用地相比其他情景较多(1.20km^(2)),扩张分布较为合理,带来的生态环境压力和碳排放压力较小,既有利于生态环境保护也有利于社会经济发展。③碳排放响应结果显示,在不同情景下长株潭城市群各区县的碳排放对建设用地扩张均表现出一定的敏感性,综合建设用地扩张与碳排放响应结果,绿色低碳发展情景是长株潭城市群未来的较优发展模式。

Study on the Collaborative Governance Mechanism of Ecological Environment in Changsha-Zhuzhou-Xiangtan Region under the Green Development Perspective

Natural resources and the environment,environmental capacity of China has been approaching the red alert,and long-term accumulation of ecological debt needs to be solved. The transformation of economic development mode and green economic development path are inevitable choices. The complexity and the pressureof the ecological environment governance force Changsha-Zhuzhou-Xiangtan region to change the ecological governance method. The " government-market-society" is taken as the overall framework,to build a diversified body of eco-environment collaborative governance platform. Through collaborative governance among governments,government-market collaborative governance and government-society collaborative governance,ecological capital stock is improvedin the quantity and quality,thus contributing to benigndevelopment of regional economy and society.

Dynamic Evaluation of Rationality of Land Use Structure in the Changsha-Zhuzhou-Xiangtan Area

The rationality of land use structure was evaluated with dynamic TOPSIS method based on changing data of land use from 2008 to 2011 in the Changsha-Zhuzhou-Xiangtan area. The results showed that during 2008- 2011,the rationality of land use structure was totally high,the dynamic value hi of Changsha,Zhuzhou,Xiangtan and the Changsha-Zhuzhou-Xiangtan area was 0. 7954,0. 7821,0. 8245 and0. 8186,respectively; the value Ci( tk) reflecting the rationality of land use structure at different time points was rapidly increased,and the gap between regions was not big and shrinking. According to the grey relational analysis,the change of different land use types had different effects on the rationality of land use structure: transportation land,the land for cities,towns and villages and the land for mining and industry are most highly correlated with the rationality of land use structure,while arable land,woodland,water area and water conservancy facility land have also an important impact on the rationality of land use structure; controlling the excessive growth of transportation land,the land for cities,towns and villages and the land for mining and industry,protecting arable land,forest land,water area and water conservancy facility land,and moderately increasing the garden plot,plays a decisive role in optimizing the land use structure in the Changsha-Zhuzhou-Xiangtan area.

长株潭城市群生态环境与城镇化时空耦合协调关系--基于遥感生态指数和夜间灯光指数

城镇化是推动社会经济发展、影响区域生态安全格局的重要因素,生态环境与城镇化的稳定协调是实现区域可持续发展的保证。为平衡城市群在城镇化发展进程中与生态环境的耦合协调关系,以长株潭城市群23个区(县)为研究对象,综合利用土地利用、夜间灯光和MODIS数据,基于Google Earth Engine(GEE)平台,构建2002~2022年夜间灯光指数和遥感生态指数分别表征城镇化水平和生态环境质量,并采用耦合协调度模型探析长株潭城市群城镇化与生态环境耦合协调的等级聚类和时空差异。结果表明:①2002~2022年,长株潭城市群热度变化显著,降低29.26%,且除炎陵县外,其他区(县)生态环境质量均有不同程度下降,呈倒“N”型或“M”型走势,开福区、天心区、天元区等城镇建设活动多的区(县)遥感生态指数下降幅度最大;②长株潭城市群城镇化水平有所提高,夜间灯光指数整体呈上升趋势,但2022年增速低于2017年,区(县)之间发展不均衡,城镇化水平较高的区(县)集中在长沙;③长株潭城市群多数区(县)耦合度在2002~2022年处于从拮抗到磨合过渡的阶段,2012年耦合度整体处于较高水平,但17个区(县)在2017年又落回较低阶段。2022年长株潭城市群大部分区(县)耦合协调度达到协调状态,部分区(县)长期失调,整体耦合协调情况较好,但空间分布不均衡,呈现中北部高、南部低的特征。

长株潭城市群经济-社会-生态协同发展水平的演化特征及提升路径

基于复合系统协同度模型,将城市群解析为由经济、社会、生态等子系统集成的复合系统,以长株潭城市群为对象,探讨国家“两型”社会综合配套改革试验区获批成立以来长株潭城市群经济-社会-生态协同发展水平的演化特征并探寻其提升路径。结果表明:1)从城市群尺度看,2007—2019年长株潭城市群经济、社会、生态子系统有序度总体呈提升趋势,复合系统协同度由轻度失调走向中度协同;2)从城市尺度看,长沙市、株洲市已实现中度协同,湘潭市仍为轻度协同,研究期内长沙市复合系统协同度持续强化、株洲市与湘潭市相对弱化;3)长株潭城市群协同发展目前存在两大问题,一方面城市群总体协同水平偏低、社会-生态子系统变化缓慢,主要制约序参量为基础设施和环境治理;另一方面城市间协同水平存在明显差距,主要制约序参量为经济规模、发展质量、产业结构和污染排放;4)长株潭城市群协同发展水平的进一步提升,在城市群尺度下需合理制定各子系统有序发展与协同目标,健全城市群财政及公共事务统筹管理机制;在城市尺度下各城市应补足短板、提升发展能级,不断完善城市间互动合作机制。

Assessment and Countermeasures of Ecological Civilization Construction in Changsha,Zhuzhou and Xiangtan

[Objective] The aim was to assess the ecological civilization construction in urban agglomeration composed of Changsha,Zhuzhou and Xiangtan synthetically.[Method] By means of analytic hierarchy process,the assessment system of ecological civilization in Changsha,Zhuzhou and Xiangtan was established firstly,and then the ecological civilization construction in Changsha,Zhuzhou and Xiangtan was evaluated comprehensively,and the existing problems and causes of ecological civilization construction were analyzed,finally the corresponding suggestions and countermeasures were put forward.[Result] For natural subsystem and social subsystem,the comprehensive scores of Changsha,Zhuzhou and Xiangtan were 0.143 and 0.214,and Changsha had the highest scores (0.150 and 0.221),and next came Xiangtan (0.142 and 0.219),while the scores were the lowest in Zhuzhou (0.136 and 0.213).From economic subsystem,the comprehensive score of urban agglomeration composed of Changsha,Zhuzhou and Xiangtan was 0.216,and the maximum score appeared in Changsha (0.247),Zhuzhou the second (0.201),while Xiangtan owned the lowest score (0.197).In cultural subsystem,the comprehensive score of urban agglomeration was only 0.078 which was the lowest score among four subsystems,and it was related to its low weight.In addition,the scores of Changsha and Xiangtan took the first place (0.079),while it was lower in Zhuzhou (0.077).[Conclusion] The ecological civilization construction in Changsha,Zhuzhou and Xiangtan persisted at a higher level and developed well on the whole.

城市森林植物生态功能研究--以长株潭城市群为例

以长株潭城市群城市森林植物为研究对象,系统研究其生态功能,包括植物滞尘效应、植物挥发性物质抑菌能力、植物释放低分子化合物能力、植物负离子效应、植物吸收二氧化硫气体能力及降温效应等,为长株潭城市群城市森林科学发展提供理论依据.

长沙-株洲-湘潭市主城区土地利用变化的生态环境效应

根据长株潭(长沙—株洲—湘潭市)主城区1996—2008年土地利用变更调查数据,采用Costanza生态系统服务价值的计算方法,参照谢高地的生态服务价值系数,结合敏感性(CS)分析,评估了研究区域土地利用类型的生态系统服务价值,并利用灰色模型对其发展趋势进行了预测分析。结果表明,研究期内,研究区生态系统服务价值从1996年的1.69×109元减少至2008年的1.48×109元。根据灰色模型的预测结果,得到2035年研究区域生态系统服务价值将减少至1.08×109元。区域价值受损的主要原因是土地利用转化导致生态服务价值的流向变化,耕地、林地、水域向建设用地的转移导致生态服务价值的负流向。研究区域快速城市化和以追求GDP高速增长的发展模式已给生态安全带来了巨大压力。

基于“三生”空间视角的城市群国土空间利用质量评价--长株潭城市群的实证研究

国土空间作为区域经济社会高质量发展和生态文明建设的重要载体,其利用质量的好坏与利用效率的高低,是新时期优化国土空间布局亟需研究的重要课题。在生态文明建设背景下,以绿色发展为目标导向,在借鉴已有相关研究成果的基础上,从生产、生活和生态空间的现实状态和对区域经济社会发展的综合保障与支撑能力方面构建国土空间利用质量综合评价指标体系,综合运用熵值法确定权重和耦合协调度模型,对长株潭城市群2010—2019年国土空间利用质量和耦合协调度进行综合评价与分析,以指导区域国土空间可持续利用、高质量发展。结果表明:长株潭城市群整体上国土“三生”空间利用质量的整体耦合协调度不高,各市层面的国土空间利用质量综合评价指数出现明显的区域时空分异特征。基于区域国土空间高质量发展视角,提出应加快推进长株潭城市群一体化、集约化、适度化、绿色化、创新化、重点化发展的措施建议。

基于NC-DEA模型长株潭耕地利用经济效率的视窗分析

笔者利用长株潭地域15个县市区1996—2012时段面板数据,采用非控制变量数据包络模型视窗分析方法研究耕地利用效率的变化。结果发现:长株潭市区县地域单元耕地利用经济效率时间变化相对稳定,市域耕地利用经济效率高于其他地域,表明外部环境因素对经济效率产生明显影响,优越的社会经济环境条件有利于耕地效率的提高,非控制变量的数据包络方法在不删除其他要素条件下能评价耕地单要素效率,视窗分析能解释效率的动态变化,二者结合的特定要素的DEA视窗分析方法可以给其他类型土地效率评价提供重要的分析工具。

2000-2018年长株潭城市群“三生”空间格局演变

随着城市化进程的不断推进,城市群区域内“三生”空间格局发生了显著变化。本文以长株潭城市群为研究区域,运用土地利用转移矩阵、景观格局指数、重心迁移等方法,分析18年来长株潭城市群“三生”空间时空分异格局。结果表明:①18年来长株潭城市群生活空间以扩张为主,生产空间保持稳定,生态空间则有明显缩减;②三类空间景观破碎程度均不断加深;③18年间,三类空间的标准差椭圆长轴均为西北—东南走向,生产、生活空间的重心迁移距离最小,生态空间重心移动趋势剧烈。

Research on Traffic Accessibility and Transportation Integration Level of Chang-Zhu-Tan City Group in China

Aiming at the problem of lack of data model to analyze the level of transportation integration, the paper taking Changsha-Zhuzhou-Xiangtan City Group of China as the research object, based on the Gravity measurement model, transportation comprehensive distance model, weighted road density model, analysis of Changsha-Zhuzhou-Xiangtan City Group accessibility and transportation integration level. A new method to measure the level of traffic integration is proposed and verified by the road network data and socio-economic data of Changsha-Zhuzhou-Xiangtan City Group. The results show that: Changsha-Zhuzhou-Xiangtan City Group traffic accessibility was “point to surface” shape distribution, taking the core region of Changsha as the optimal, Xiangtan, Zhuzhou, Changsha County next, in remote Yanling County, Chaling county has the lowest accessibility;the correlation between traffic network connection degree and economic connection degree reached 0.871, indicating that the transportation integration level of urban agglomerations has a high degree of fit with the level of economic integration. The research results on the one hand for the Chang-Zhuzhou-Xiangtan urban agglomeration traffic present situation to make an annotation;on the other hand, that provide a reference for further optimization of Changsha-Zhuzhou-Xiangtan urban agglomeration traffic planning.

基于熵值法的城市群旅游业绩效评价--以长株潭城市群为例

城市群旅游业绩效评价是一个重点问题。构建了由经济、市场、效率、环境在内的旅游业绩效评价体系,运用熵值法对2010-2016年长株潭城市群旅游业绩效进行了综合测度。研究表明:(1)长株潭城市群整体旅游业绩效值较高,总体呈现平稳上升趋势。(2)长株潭城市群内部间旅游业绩效值差距较大,发展不平衡,其中长沙的绩效值比株洲湘潭高,三城市间四个绩效也存在不同程度的差异,经济绩效和市场绩效较高,效率绩效次之和环境绩效最低。

城市群规划实施效果评估研究——以长株潭城市群为例

长株潭城市群经济发展对于湖南省以及中国中西部地区的发展至关重要,且该城市群规划实施的效果对其他城市群有重要借鉴意义。基于此,文章根据2000-2017年地级市面板数据,采用合成控制法,评估长株潭城市群规划实施后对城镇化和环境质量的影响。评估分析表明,长株潭城市群规划的实施推动了城市群城乡融合,在一定程度上促进了城镇化的进程,但对环境造成了一定的负面影响,其原因在于长株潭城市群内城市之间的非均衡发展。因此,城市群应着眼于制定合理规划,促进城市均衡发展,重点落实城乡融合和生态文明;各级政府应加强公共治理,强化监督和治理责任,以更好地实现城市群规划的既定目标。

中国城市群突破性创新能力分析——基于环长株潭城市群的实证

为助推以长沙为核心的环长株潭城市群全球研发中心城市建设,选取环长株潭城市群2010—2021年的发展数据,从突破性创新支持、创新管理、创新投入、创新产出和创新环境等5个维度构建城市群突破性创新能力SMIOE评价模型,采用信息贡献率分析法,遴选确定17个核心评价指标,使用“交叉熵权-TOPSIS”法测算环长株潭城市群的突破性创新能力指数。研究结果发现,SMIOE评价模型能客观反映城市群突破性创新能力的真实水平,环长株潭城市群突破性创新能力总体不均匀、发展水平较低,除长沙、株洲、衡阳外,2010—2021年间,其他5个城市指数分别呈“M”型和倒“V”型下降;突破性创新能力较高的城市主要集中于湖南东北部。最后基于研究结论,从树立全域创新、协同创新和重点创新等3个方面理念,提出环长株潭城市群突破性创新能力的发展建议,为促进环长株潭城市群创新群落早日提供参考。

长株潭绿心地区产业绿色转型发展策略

长株潭绿心地区是绿色转型发展的重要战略地区,其转型发展是一个系统性整体,发展模式具有复杂的多元属性,需要因地制宜差异化选择绿心转型发展途径。长株潭绿心依托系列上位规划有序推进产业转型发展,初步形成了绿色产业发展基础。针对现存的区域协调联动不足、产业发展机制薄弱、产业项目落地难等问题,研究探索多主体、多空间、多内容的整体性转型路径:以保值增值为根本遵循,推进实现绿心生态增值、服务增值、资产增值及生活品质增值,打造可持续的绿心地区“4+N”的绿色低碳产业生态圈;建立更具包容度和功能适应弹性的弹性空间管控机制,优化形成绿心地区绿色产业发展名录,确保产业清单的协同性;通过统筹横向和纵向两大产业融合维度,发挥一三产业融合发展的乘数效应,推动空间生态产业绿色化;构建嵌入式链接发展和飞地式链接发展的创新网络,提升绿心创新竞争力,支撑区域产业经济生态化。总体通过建立更深层次的区域合作机制,保障绿心地区产业升级转型,推动长株潭绿心地区绿色转型发展。

全域空间治理视角下长株潭绿心中央公园风貌管控探索

城乡风貌管控是促进城乡高质量发展的有效手段。本文以《长株潭绿心中央公园建设风貌管控导则》为例,基于当前国土空间规划背景下全域全要素的空间治理目标,面对长株潭绿心中央公园风貌管控传导路径不畅、城乡统筹不足、管控措施乏力等治理困境,构建了技术体系、传导路径和衔接机制3个层面的长株潭绿心中央公园风貌管控体系,并通过导控结合的方式,提出长株潭绿心中央公园全域风貌管控治理优化路径,以期能为我国全域风貌管控体系的系统构建提供有益参考。

基于空间模拟的都市圈旅游景区综合交通可达性分析——以长株潭都市圈为例

综合交通可达性对当代都市圈的旅游景区服务质量和游客体验有重要作用。文章以长株潭都市圈为例,通过空间数据库构建、出发点玫瑰图构建、交通分担率测算、交通接驳时间计算、交通方式可达性分析、景区综合交通可达性结构分析等空间模拟步骤,深入归纳其旅游景区综合交通可达性的空间分布特征及问题。结果表明:长株潭都市圈中旅游景区综合交通可达性的空间分布呈现出由中心城区向边缘区域的“低-高-低”趋势。旅游景区对高速公路依赖显著,轨道交通作用发挥不足,各类交通之间接驳不畅,部分景区入口设计存在问题。文章据此提出宏观交通规划、中观交通组织、微观交通设计3方面的优化措施。文章通过对旅游交通的前端、中端、末端环节全过程分析,构建都市圈旅游景区综合交通可达性的研究框架。在交旅融合背景下,对于优化都市圈的旅游交通系统具有规划和管理的启发作用。