An overview of the resources and environment conditions and major geological problems in the Yangtze River economic zone, China

Focusing on the Yangtze River economic zone,the previous geological researches are systematically summarized,resources and environment conditions and major geological problems which are needing to be concerned in land planning and construction are studied.The results show that the resource conditions of cultivated land,shale gas,geotherm,lithium and so on are superior in the Yangtze River economic zone,and the resources and environment conditions are conducive to develop the modern agriculture,clean energy industry and strategic emerging industries.3×1013 m^2 farmlands without heavy metal pollution are concentrated;there are three national level shale gas exploration and development bases with explored reserves of 5.441×1011 m^3;geothermal availability is 2.4×109 t of standard coal each year,equivalent to 19% of the amount of coal in 2014;Asia's largest energy lithium metal ore deposit is found.In some parts of Yangtze River economic zone,there are some major geological problems such as active faults,karst collapse,ground subsidence,landslide-collapse-debris flow,affecting the river-crossing channels,high-speed railway,urban agglomeration and green ecological corridor planning and construction.Those problems should be concerned,and the relevant suggestions and countermeasures are put forward.Meanwhile,the ideas to further support the development of the Yangtze River economic zone are put forward.

Possible effect of climate changes on the coastal zone of the Yangtze River Delta

A coastal historical evolution of the Yangtze River Delta was discussed in this paper on the basis of the historical data of the coastal zone and an estimation was made for the future change of the coast The emphasis was put on the future climate change that will have influence on the sea wall, coastal navigation and freshwater resources in the Delta It was also pointed out that the global warming and precipitation increase in the Yangtze River Valley may exert more impact on the zone In addition, some measures describing how to adapt to the climate change and reduce its impact were put forward

Distribution and Controlling Factors of Dissolved Gaseous Mercury and Reactive Mercury in Seawater Near Yangtze River Estuary

Complex hydrocultural conditions in the estuary affect the migration and transformation of mercury.Using two voyages in July and October 2018,Dissolved Gaseous Mercury(DGM)and Reactive Mercury(RHg)were determined to explore the source,transformation and influence of DGM content in the adjacent waters of Yangtze River Estuary in summer and autumn.The results showed the contents of DGM and RHg in summer were higher than those in autumn,and both of them were higher than those in open sea.In summer and autumn,the Yangtze River brought a higher concentration of DGM,and different flow direction and runoff resulted in differences in the high value region of the surface.The emergence of low-oxygen zones in summer was conducive to the production of DGM.In autumn,windy weather allowed seawater disturbances to promote the release of mercury from the underlying sediments,especially in shallow sea in northwest.RHg showed a higher concentration in the offshore than in the open sea in summer,but there was no such trend in autumn,reflecting the influence of less runoff input.DGM is the main product of RHg reduction,and there was a significant positive correlation between DGM and RHg in summer(r=0.356,P<0.05),while the correlation between DGM and RHg was not significant in autumn due to the influence of light intensity,wind speed and nutrients.The exchange flux of mercury in the adjacent waters of the Yangtze River Estuary was higher than that in the open sea.There was no significant difference of the release flux of mercury in summer and autumn.This article highlighted that the input of mercury from the Yangtze River runoff promotes the release of mercury in seawater,and the hypoxic zone caused by eutrophication is conducive to the production of DGM.

Malaria Transmission Potential in the Three Gorges Reservoir of the Yangtze River, China

Objective To define and evaluate the malaria transmission potential in the Yangtze River, following construction of the Three Gorges Reservoir. Methods Six villages, namely, Kaixian, Fengjie, Wanzhou, Fuling, Yubei, and Zigui were selected for investigating the malaria transmission potential in the reservoir. Transmission potential was estimated by mathematical modeling and evaluation of the local malaria situation. Factors that influenced the transmission potential were analyzed using Poisson regression analysis in combination with Grey Systematic Theory （based on evaluation by the Delphi method）. Results Indirect fluorescent antibody data and the incidence of malaria in the local population were consistent with the malaria transmission potential calculated for the area. Multivariate Poisson regression analysis showed a statistically significant association between the riparian zone and the man‐biting rate. Conclusion The risk of a malaria epidemic can be forecasted using the malaria transmission potential parameters investigated here which was closely correlated with the riparian zone.

Land-Use Changes and Human Driving in and Near the Yangtze River Delta from 1995–2015

We analyzed the characteristics and trends of land-use change in and near the coastal zone of the Yangtze River Delta(YRD) during five periods(1995, 2000 2005, 2010, and 2015) using remotely sensed Landsat imagery. Using automatic supervised classification combined with visual interpretation, we obtained land-use information for five study areas(Nantong, Shanghai, Jiaxing, Ningbo, and Zhoushan). Significant land-use changes have occurred in this area between 1995 and 2015, characterized in particular by large reductions in cultivated land and rapid increases in urbanized land. In addition, land reclamation was very active in this period as an effective supplement to the increased demand for land development: since 1995, 1622 km^2 of land was reclaimed from near-coastal regions in the study area. This increase in urbanization was jointly driven by population, economic, transportation, and policy factors. Urban areas expanded from the center outward in concentric rings, with infrastructure guiding the radial expansion of development along transportation corridors, thus forming a network of connections. Due to the influence of national land regulation policies, the expansion rate of development in the YRD gradually diminished after 2010. This indicates that the area's resource and environmental carrying capacity has reached a saturation stage in which urbanization has transitioned from broad and incremental expansion to the intensive use of land resources.

区域协作治理中的领导力:一个动态分析框架——以长三角生态绿色一体化发展示范区为例

区域协作治理是当前公共管理研究的热点话题,将领导力理论嵌入区域协作治理场域中可以为理解复杂的协作过程提供动态视角。本文基于相关理论构建了由公共价值、运行系统、领导活动组成的区域协作治理领导力要素模型,其中公共价值是区域协作治理领导力的出发点和落脚点,运行系统由结构管理、过程管理、政治管理构成,是区域协作治理领导力的核心要素,领导活动是区域协作治理中正式领导和非正式领导的行为方式;本文以长三角生态绿色一体化发展示范区为例印证并发掘领导力的动态过程,认为示范区塑造了国家战略引领的公共价值体系,构建了以网络行政组织(NAO)为核心的复杂运行系统,形成了关系导向的领导策略和行动逻辑,通过这些领导力要素整合提升了示范区协作治理绩效;基于案例研究凝练搭建了区域协作治理领导力的动态分析框架,并提出长三角示范区加快从区域项目协同走向区域一体化制度创新的对策建议。

新能源汽车产业集聚对区域绿色经济效率的影响——基于长江经济带的实证研究

将产业集聚、绿色技术创新和绿色经济效率纳入同一研究框架,聚焦长江经济带,研究新能源汽车产业集聚对绿色经济效率的影响,为我国在“双碳”背景下推进实现制造强国的战略目标及长江经济带新能源汽车发展提供参考。论文基于2012—2020年长江经济带沿线11个省市面板数据,综合利用超效率SBM和区位熵法,构建计量模型,实证研究新能源汽车产业集聚对绿色经济效率的影响,探讨绿色技术创新的中介效应,并进一步分析新能源汽车产业集聚对绿色经济效率的空间溢出效应和区域异质性。研究结果表明:1)长江经济带整个区域已形成“带状”新能源汽车产业集聚区,集聚平均水平随年份波动上升,上中下游产业集聚水平呈递增格局,水平差异较大且有逐渐增加趋势;2)新能源汽车产业集聚通过整合内部网络资源和提升外部整体能力,对长江经济带绿色经济效率具有正向促进作用;3)产业集聚的发展通过竞争效应和合作效应促进绿色技术创新,而绿色技术创新的发展可以提升经济动力和效率,因而绿色技术创新在产业集聚与绿色经济效率之间具有中介作用;4)新能源汽车产业集聚对绿色经济效率具有空间溢出效应,上中下游新能源汽车产业集聚对绿色经济效率的影响存在差异。据此,从加强产业集群建设,发挥新能源汽车产业发展的长效机制、强化发展绿色技术创新体系和推动新能源汽车区域异质性发展三个方面提出对策建议。

长江中游护滩服役状态评价体系

随着长江航道建设的快速发展,维护管理好在役的航道整治建筑物成为一项重要工作。目前国内针对长江中常见的航道整治建筑物——护滩服役状态的相关研究较少。基于考虑指标模糊性的可拓云理论,建立护滩服役状态评价模型。依据监测信息、护滩历年维护经验和相关规范,构建了评价指标体系,并结合序关系法和熵权法,综合确定指标权重,经模型计算可以得到护滩所隶属的服役状态等级。将该模型应用于长江中游新九水道护滩服役状态评估,评价结果与工程实际情况吻合。验证表明,本文所建立的护滩服役状态评价模型可以正确识别护滩服役状态,指导护滩日常维护工作,推进长江航道养护智能化。

基于机载高光谱遥感的长三角一体化示范区水质监测

本文基于机载航空高光谱影像数据对长三角生态绿色一体化发展示范区内“一河三湖”重点水域水质参数进行了反演研究。试验获取了示范区内全谱段高光谱影像数据,通过对机载遥感影像进行预处理,获得水体离水反射信息;在飞行时刻同步采集了水体样本与水体光谱,通过竞争性自适应重加权特征选择方法,选择最优波段参与反演模型的构建,并完成水质专题制图。模型验证集的决定系数R^(2)均达0.6以上,同时与水质监测站数据误差小于10%,实现了长三角一体化示范区的水质精确监测,证实了机载高光谱遥感对于水质参数的反演应用价值,为示范区发展赋能高质量。

Regional eco-efficiency evaluation and spatial pattern analysis of the Yangtze River Economic Zone

The environmental ecology of the Yangtze River Economic Zone(YREZ)faces ecological function decline,deterioration and degradation under intense human activities,long-term development and utilization and its economy has developed rapidly over recent decades.Eco-efficiency is considered as a measure of coordinated development of economy,resources,environment and ecology,and is currently considered a very important issue.In this paper,based on the slack-based measure and data envelope analysis model,we take 129 prefecture-level cities of the YREZ as the study unit and measure the eco-efficiency of the YREZ in 2000,2005,2010 and 2015,which considers undesired output.The evaluation of the status quo of the regional eco-efficiency development was carried out at provincial,prefectural and city scales.The spatial autocorrelation test model and standard deviation ellipse were used to analyze the spatially distributed characteristics and the evolutionary regularity of eco-efficiency.Our study suggested that the eco-efficiency value varied significantly at different spatiotemporal scales and the overall distribution presented an"N-shaped"pattern,the value is the largest downstream and the smallest upstream.Regional eco-efficiency presented certain volatility in growth and a clear spatial positive agglomeration trend from 2000 to 2015.The spatial distribution of each agglomeration area was also significantly different,forming some high-high agglomeration areas at the center of the shaft with Shanghai and surrounding cities,and some low-low agglomeration areas at the center with middle reaches and upstream cities.The low-high over-aggregation and high-low polarization clusters were fewer.At the same time,with the change of the research period,the degree of positive agglomeration became increasingly pronounced and the eco-efficiency gap of the neighborhoodunit reduced.The regional eco-efficiency value of the YREZ presented a spatial distribution pattern in the northeast-southwest axis and the evolutionary pattern of the regional eco-efficiency similarly showed a northeast-southwest orientation.

长三角地区传统村落空间分布及其影响因素研究

以长三角地区41个地市2012-2022年间评选的1255个传统村落为研究对象,采用核密度分析、标准差椭圆和随机森林回归等方法,分析传统村落空间演化规律及影响因素。研究结果表明:长三角地区传统村落空间分布不均衡,在苏浙皖交界处分布集中,形成了西北-东南方向的空间分布格局;少数民族人口比例对传统村落密度的正向影响最为明显,路网密度、人口密度、农业生产总值、城镇化率、财政支出和游客周转量等影响因子与传统村落密度间大多表现为负向关系;从影响因素来看,长三角地区传统村落的形成演化是地理条件、社会经济和历史文化交互耦合作用的结果。该研究能为长三角地区传统村落保护与开发和乡村振兴发展提供科学依据和理论参考。

长江中游城市群数字经济发展水平的区域差异与分布动态演进

基于2011—2020年长江中游城市群28个城市面板数据,利用熵权法测算其数字经济发展水平,并运用Dagum基尼系数和核密度估计等方法对长江中游城市群数字经济发展的区域差异、差异来源和分布动态进行分析。研究发现:(1)长江中游城市群各城市数字经济发展水平持续提升,区域数字经济发展总体趋于均衡。(2)Dagum基尼系数分解结果表明:在观测期间,武汉城市圈数字经济发展不均衡现象较为显著,环长株潭城市群和环鄱阳湖城市群区域内差异波动下降;三大区域之间的数字经济发展差距均呈下降趋势;从差异来源看,三大区域数字经济发展差异主要是由区域之间的超变密度构成。(3)从核密度曲线的分布特征来看,长江中游城市群总体和三大子区域的核密度曲线均呈现“长尾起峰”的态势,并且三大子区域内的数字经济发展水平差异呈扩大趋势。基于上述结论,长江中游城市群应全力提升区域数字经济发展水平,区域内各城市应因地制宜进行数字经济的差异化和特色化产业布局,并加强数字经济产业的跨区域政策沟通和协作。

长江经济带国土空间格局与功能演变的时空特征和响应过程

揭示国土空间格局与功能演变的内在机制对缓解国土空间冲突具有现实意义。在探讨国土空间格局与功能交互机制的基础上,采用地学图谱、核密度估计等模型分析2000—2020年长江经济带国土空间格局与功能演变的时空特征,借助双变量空间自相关模型识别国土空间格局与功能演变的响应过程。结果表明:1)长江经济带20 a内城镇空间扩张29559.54 km^(2),迫使农业空间与生态空间分别减少25162.63、3268.36 km^(2),农业空间与生态空间互换及其内部结构重组主导国土空间格局演变过程,国土空间格局演变速度呈现上游快于中游快于下游的地域分异规律。2)长江经济带城镇、农业和生态功能均值分别由0.129、0.287、0.646提升至0.343、0.456、0.698,中、下游地区国土空间功能发展由城镇功能拉动、农业功能推动,上游地区国土空间功能发展由生态功能主导、农业功能抬升,国土空间功能演变强度具有下游高于中游高于上游的区域差异特征。3)国土空间格局与功能演变具有双向非线性响应关系,城镇空间扩张与其功能扩容呈现“双增”的空间正相关性,农业、生态空间收缩与其功能提质呈现“一减一增”的空间负相关性,上、下游国土空间格局与功能演变的响应程度较高,中游地区因面临上游地区城镇、农业功能的虹吸效应和下游地区生态功能的溢出效应,响应程度较低。应以国土空间功能提质、增效、扩容为导向,形成互补、融合、协调的城镇空间开发、农业空间保护、生态空间修复的国土空间格局,促进长江经济带可持续均衡发展。

长三角合作共建园区转型路径与机制——基于“同质多形”视角

合作共建园区的转型发展作为重要区域治理现象在学术界备受关注。本文采用半结构化访谈法和文本分析法,援引“同质多形”理论视角并构建研究框架,尝试从尺度、网络、领域等多个维度揭示长三角合作共建园区转型的内在动力及其新发展趋势。研究发现:①长三角合作共建园区多维特征处于动态演化中,资本需求与行政治理困境共同构成最为关键的演化动力。园区经历了以企业转移为目标的早期形成阶段、2010年后的波折发展阶段以及2016年后以多元伙伴议程为导向的创新转型阶段,园区的转型发展由不同时期经济发展需求与行政治理困境共同推动。②长三角合作共建园区治理方式从政府间协同转向多元主体网络行动,使园区的尺度、网络、领域特征从早期迁出地主导的单中心治理方式向多元化发展。③长三角合作共建园区的建设从突出专业化经济优势转向囊括创新、生产、居住等要素的综合性整体系统转变,是当前区域治理日趋复杂的缩影,国家到地方、政府到市场的不同行动主体都参与其中。总之,本文揭示了合作共建园区治理的新趋势,并强调同质多形框架在认识与推动当前合作共建园区新发展中的理论与实践价值。

“跨界合作园区热”:尺度重组与空间转型——以长江三角洲地区为例

21世纪初以来,中国城市的增长经历了从竞争到合作的转变,“跨界合作园区热”接替“开发区热”成为转型期城市空间重构过程的集中展示。(1)研究立足长三角跨界合作园区的转型发展历程,探讨跨界合作园区历经的转移工业园、跨界新城到合作创新区的政策发展历程,及其空间转型的基本趋势;(2)基于空间转型与合作主体尺度重组活动的紧密联系,进一步探讨空间转型背后尺度重组的动力机制,并提出尺度上推、尺度融合与尺度多元化3个重组阶段及其所形成的托管、合署与企业式3种治理模式;(3)研究建构了跨界合作园区尺度权力重组与空间转型的逻辑框架,并从动态引导的政策支撑体系、劳酬对等的利益协调机制、省-地监管的分层管控机制等方面提出政策建议。

长江中游城市群制造业数字化转型升级水平及其影响因素

随着工业发展的不断推进,制造业数字化转型日益成为重要的趋势。数字化技术的快速发展和普及为制造业带来了前所未有的机遇和挑战。通过熵权法构建长江中游城市群制造业数字化水平指数,探讨长江中游城市群制造业企业数字化转型升级水平的影响因素。结果表明,数字化技术升级、数字化创新升级及数字化效益升级对于推动制造业的数字化转型具有重要的推动作用。

The Driving Forces and Synergistic Effect between Regional Economic Growth,Resources and the Environment in the Yangtze River Economic Zone

From the viewpoints of population,resources,environment and economic-social development,we establish the models of accounting for resource and environmental costs and coordinated（or relative coordinated） development degrees between economic growth and resources and the environment using the evaluation method of ecosystem service value.Synergistic effects between regional economic growth and resources and the environment in the Yangtze River Economic Zone was analyzed and driving forces were analyzed by regression of partial least squares.We found that from 1983 to 2012,resource and environmental costs in the Yangtze River Economic Zone（including seven provinces and two municipalities） increased from 4736.55 trillion CNY to 15 359.45 trillion CNY and corresponding weights dropped from 31.1% to 19.7% compared to the national level.The degree of coordinated development rose from 0.295 to 1.506,higher than the national average.In the years 1983,1993 and 2003,the main factor that drove the coordinated development of regional economic growth,resources and the environment was low level resource and environmental costs.With continuous increases in primary and tertiary industrial added values after 2012,the advantage of the Yangtze River Economic Zone has weakened.In the future,provinces should improve the rules and regulations on planning and implementing main functional areas,promote adjustment of industrial structure,restore ecology,improve resource utilization efficiency and reduce environmental loss costs to enhance quality of economic development and promote the coordinated development of regional economic growth and resources and the environment.

Analysis on the Output Elasticity and Contribution Rate of Energy Consumption to Economic Growth in China's Yangtze River Economic Zone

Many studies have shown that energy consumption plays an important role in economic growth.The paper researches the influence of energy consumption on economic growth in China’s Yangtze River Economic Zone.The paper divides the energy of Yangtze River Economic Zone into the coal,the oil,the natural gas and the electricity and explores the influences of coal consumption,gas consumption,natural gas consumption and electricity consumption on economic growth quantitatively using an extended production function model.The paper mainly uses two methods.The first method is the output elasticity analysis.The paper calculates the four energy consumption’s output elasticity to economic growth to compares the influences of energy consumption in terms of out output elasticity.The second method is the contribution rate analysis.The paper calculates the contribution rates of four energy consumption to economic growth to compare the influences of four energy consumption on economic growth in terms of contribution rate.The paper makes an empirical analysis on the influence of energy consumption on economic growth in China’s Yangtze River Economic Zone.Analysis results show that oil consumption has the greatest influence on economic growth in China’s Yangtze River Economic Zone,in terms of both output elasticity and contribution rate,followed by natural gas consumption,electricity consumption and coal consumption.

长江中游城市群新型城镇化与共同富裕耦合协调度的时空演化特征及影响因素研究

该文运用耦合协调模型探讨长江中游城市群2009—2021年的新型城镇化和共同富裕水平的关系,并借助地理加权回归模型分析其影响因素.结果发现:1)长江中游城市群的共同富裕水平呈波动性上升的趋势,武汉城市圈及长株潭城市群的城市优于群内其他区域的城市.另外,新型城镇化指数总体呈现出线性增长,在2009年、2013年、2017年期间空间“极化”现象显著,2021年整体差距减小.2)新型城镇化与共同富裕的耦合协调水平亦呈现出波动上升的趋势,其中长沙市、武汉市的等级最高,处于较高协调阶段.3)GWR模型结果显示消费、产业结构、行政政策、科技创新和环境规制等因素在时空上存在显著差异.不同时间段各因素对地区的影响强度和波动方向稍有不同.产业结构、消费及环境规制均有显著正向影响,而行政政策及科技创新的正向影响稍弱,且区域间的主要动力差异明显.

长江上游潜流带泥沙中石油烃吸附机理研究

生态优先、绿色发展是推动长江经济带发展必须坚持的战略定位,然而随着长江航运的迅猛发展,大量船舶溢油污染物在长江潜流带沉积,威胁生态安全。为研究船舶溢油在长江上游潜流带中的吸附规律,本研究选用长江航运广泛使用的0号柴油为实验用油,以长江上游潜流带泥沙为研究对象,通过室内平衡振荡实验分析不同浓度水溶态石油烃在不同粒径泥沙中的吸附机理。结果表明:长江上游潜流带泥沙颗粒对水溶态石油烃的吸附平衡时间均在2 h左右,吸附过程呈明显的二阶段特征,包括快速(0~1 h)和慢速(1~2 h)两个阶段,快速阶段吸附量在90%以上,吸附量与粒径大小关系显著,准二级动力学模型(R^(2)为0.995~0.997)拟合效果更好。潜流带泥沙吸附过程呈线性趋势特点明显,Henry线性等温吸附模型(R^(2)为0.918~0.996)对等温吸附实验结果的拟合度更高,呈现出强分配、弱吸附的特点。大多情况下石油烃浓度越高、泥沙粒径越小,泥沙单位吸附量则越多,但有机质含量的差异会影响这一规律;此外,水土比降低、盐度升高会使泥沙单位吸附量增加。研究显示,长江上游潜流带泥沙对水溶态石油烃的吸附速率主要受到化学吸附机理控制,以表面有机质溶解分配作用为主,以非均匀表面化学吸附为辅,石油烃浓度、泥沙粒径、水土比、盐度均对石油烃在潜流带中的吸附有一定影响。