中国城市体系网络化研究   总被引：14，自引：1，他引：13  

胡国建  陈传明  金星星  王强 《地理学报》2019,74(4):681-693

当前,学者普遍认同城市体系研究的重心从等级范式向网络范式转向。在大量的文献梳理基础上,阐述20世纪80年代以来中国城市体系研究范式的转向过程,并进一步梳理中国城市网络研究的进展、问题与关注重点。结果表明：2010年之后,网络成为中国城市体系研究的主流范式,等级体系文献数量呈波动递减趋势,全国和长三角成为热点关注区域;属性数据一定程度上弥补了早期城市网络研究中数据匮乏的状况,关系数据应成为未来研究的侧重点;不同研究视角及其所应用的数据存在着一定的局限性,多元视角的综合研究成为趋势。在此基础上,提出城市网络研究未来可能的突破点,包括：调整国家城市网络的研究框架、超越交通数据直接考察城市间的实体联系、测度企业外部的横向联系、有向加权网络分析和可视化、增加研究中的地理“意味”等。  相似文献   

Gentrification as space domestication. The High Line Art case     

Pier Luigi Sacco  Maria Tartari  Guido Ferilli  Giorgio Tavano Blessi 《Urban geography》2019,40(4):529-554

In this paper, we critically examine the role of artistic locational choices and practices in the context of gentrification processes in urban renewal contexts. We characterize gentrification as a form of domestication of space, and explore the extent to which artistic choices and practices relate to such process with reference to the deontological dilemma of legitimization within the art system vs. responsible empowerment of vulnerable local constituencies. We illustrate our argument with an analysis of the High Line Art project, and show how this can be considered as a textbook example of art-driven space domestication leading to brutal forms of gentrification. We comment on the threat that this provides to the social credibility of artistic practices as an agency of responsible social change.  相似文献   

Analog simulation of urban construction land supply and demand in Chang-Zhu-Tan Urban Agglomeration based on land intensive use     

Xiong  Ying  Chen  Yun  Peng  Fen  Li  Jingzhi  Yan  Xiaojing 《地理学报(英文版)》2019,29(8):1346-1362

Journal of Geographical Sciences - Urban land intensive use is an important indicator in harmonizing the relationship between land supply and demand. The system dynamics (SD) can be used to...  相似文献   

How changes of groundwater level affect the desert riparian forest ecosystem in the Ejina Oasis,Northwest China     

HaiYang Xi  JingTian Zhang  Qi Feng  Lu Zhang  JianHua Si  TengFei Yu 《寒旱区科学》2019,11(1):62-80

Groundwater is a key factor controlling the growth of vegetation in desert riparian systems. It is important to recognise how groundwater changes affect the riparian forest ecosystem. This information will not only help us to understand the ecological and hydrological process of the riparian forest but also provide support for ecological recovery of riparian forests and water-resources management of arid inland river basins. This study aims to estimate the suitability of the Water Vegetation Energy and Solute Modelling(WAVES) model to simulate the Ejina Desert riparian forest ecosystem changes,China, to assess effects of groundwater-depth change on the canopy leaf area index(LAI) and water budgets, and to ascertain the suitable groundwater depth for preserving the stability and structure of desert riparian forest. Results demonstrated that the WAVES model can simulate changes to ecological and hydrological processes. The annual mean water consumption of a Tamarix chinensis riparian forest was less than that of a Populus euphratica riparian forest, and the canopy LAI of the desert riparian forest should increase as groundwater depth decreases. Groundwater changes could significantly influence water budgets for T. chinensis and P. euphratica riparian forests and show the positive and negative effects on vegetation growth and water budgets of riparian forests. Maintaining the annual mean groundwater depth at around 1.7-2.7 m is critical for healthy riparian forest growth. This study highlights the importance of considering groundwater-change impacts on desert riparian vegetation and water-balance applications in ecological restoration and efficient water-resource management in the Heihe River Basin.  相似文献   

乡村振兴规划的性质及其体系构建探讨   总被引：1，自引：0，他引：1  

王介勇  周墨竹  王祥峰 《地理科学进展》2019,38(9):1361-1369

实施乡村振兴战略是解决中国新时代社会主要矛盾的必然要求,关系着国家现代化的成败。落实乡村振兴战略需要建立科学合理的乡村振兴规划体系,统筹协调和优化配置城乡要素资源。论文基于地理学综合视角,深入分析乡村概念内涵与乡村发展的基本特征,总结乡村振兴规划的基本性质与存在的主要问题,初步构建了乡村振兴规划体系框架。结果表明：① 乡村包含社会文化、政治经济和地理空间多重属性,具有生产、生活、生态、文化等多功能,乡村振兴发展是乡村资源开发利用、经济社会发展和自然人文耦合的综合过程;② 乡村系统具有要素分散性和发展自组织性、空间异质性和类型多样性、对区域和城市依赖性与产业发展受自然因素强限制的基本特征;③ 乡村振兴规划是对乡村空间要素资源配置的统筹协调过程,其本质是以促进公平为导向的规划,应更加强调规划参与过程及其统筹协调能力;④ 当前中国乡村规划尚未形成完整体系,缺少法律基础,规划技术理论发展较滞后,规划边界模糊、规划深度不够,规划实施保障机制不健全;⑤ 基于上述理论和问题分析,构建了包含主体规划系统、制度保障系统、技术支持系统、多规协调系统和参与反馈系统的“五位一体”乡村振兴规划体系。该体系可以高效配置乡村要素资源,促进城乡融合发展,有利于形成规划合力,增强乡村振兴规划的权威性、可行性和实用性。  相似文献   

基于引文分析法的“点-轴系统”理论研究述评     

李满春  姚梦汝  汪侠  刘小强  陈焱明 《地理科学进展》2019,38(2):164-174

论文采用引文分析法,对陆大道院士所著《关于“点-轴”空间结构系统的形成机理分析》一文的349篇引文进行分析,从引文数量、引文作者、发文期刊、研究案例地、学科领域、研究主题、引用动机7个方面,探究“点-轴系统”理论的研究现状。结果表明：自2002年以来,“点-轴系统”理论的引文数量整体呈上升趋势,研究主题聚焦于区域经济和旅游发展;研究案例地以省级和市级中观尺度为主,多为单一型研究区,主要集中在西北丝绸之路经济带、东北辽宁经济圈、西南藏滇川渝、东部长三角四大热点区域;引文质量普遍较高,并且具有多学科交叉应用的特点,但批判性思考和创造性提升相对较少。基于此,论文从拓展研究和实践应用2个角度对“点-轴系统”理论未来发展进行了展望,以期为相关研究提供参考。  相似文献   

Researching and Teaching the Anthropocene     

Kenneth R. Young 《Geographical review》2019,109(2):258-264

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利用水系沉积物高程定量恢复古地貌的技术方法——以鲁西白彦地区白彦砾岩为例          下载免费PDF全文

程光锁  于学峰  杨斌  胡戈  李兆营  周军  刘卫东  罗文强  马祥县 《山东国土资源》2019,35(9)

主要分析了构造抬升对水系和地形的影响和恢复,以从古生代灰岩围岩中大面积但零星出露的岩溶砾岩点为研究对象,对区域古水系和地形地貌恢复和反演做出了新的尝试。在收集资料和实测的基础上,尝试性探讨了利用稳定水体参照物高程反演抬升高度以及邻区山峰点的古高程、古水系,恢复区域上古地形地貌的技术方法。并以白彦地区为例,通过白彦岩溶砾岩的分布、产状、金刚石矿物含量、岩性等地质特征,恢复白彦地区古地形线、古水系位置和流向等古地理地貌,指出在白彦期时代,该区总体发育4个水系,邹城市大石墙水系、枣庄水系、平邑水系、费县水系,水系中金刚石含量较为丰富的砾岩点大多分布在凤凰山隆起中心,其中在平邑水系推测存在一个山地峡谷中的古湖泊。认为蒙山凸起中已知的常马庄地区的金伯利岩脉所含有金刚石可能主要供应平邑区水系,其他3个地区水系的金刚石可能来源于凤凰山及其东部隆起剥蚀地区。  相似文献   

The bivalve Lembulus bicuspidatus may enhance denitrification in shelf sediment at the Angola–Benguela Frontal Zone     

A Neumann  A Flohr 《African Journal of Marine Science》2018,40(1):91-96

We collected living individuals of the bivalve Lembulus bicuspidatus, which shows an unusual preference for the oxygen-deficient habitat found at the Angola–Benguela Frontal Zone of the southeastern Atlantic. With a series of incubation experiments with ¹⁵N-labelled nitrate as a tracer in combination with membrane-inlet mass spectrometry, we studied the potential contribution of L. bicuspidatus to nitrate reduction in the upper sediment layer. Our preliminary results suggest that L. bicuspidatus enhances nitrate reduction if the oxygen concentration is sufficiently low. The Lembulus-mediated nitrate reduction rate is then similar to the rate of microbial nitrate reduction in the surrounding sediment.  相似文献   

Newly discovered hydrothermal fields along the ultraslow-spreading Southwest Indian Ridge around 63°E     

陈杰  陶春辉  梁锦  廖时理  董传万  李怀明  李伟  王媛  岳羲和  何拥华 《海洋学报(英文版)》2018,37(11):61-67

The ultraslow-spreading Southwest Indian Ridge(SWIR) to the east of the Melville fracture zone is characterized by very low melt supply and intensive tectonic activity. Due to its weak thermal budget and extremely slow spreading rate, the easternmost SWIR was considered to be devoid of hydrothermal activity until the discovery of the inactive Mt. Jourdanne hydrothermal field(27°51′S, 63°56′E) in 1998. During the COMRA DY115-20 cruise in2009, two additional hydrothermal fields(i.e., the Tiancheng(27°51′S, 63°55′E) and Tianzuo(27°57′S, 63°32′E)fields) were discovered. Further detailed investigations of these two hydrothermal sites were conducted by Chinese manned submersible Jiaolong in 2014–2015. The Tiancheng filed can be characterized as a lowtemperature(up to 13.2°C) diffuse flow hydrothermal field, and is hosted by fractured basalts with hydrothermal fauna widespread on the seafloor. The Tianzuo hydrothermal field is an inactive sulfide field, which is hosted by ultramafic rocks and controlled by detachment fault. The discovery of the three hydrothermal fields around Segment #11 which receives more melt than the regional average, provided evidence for local enhanced magmatism providing heat source to drive hydrothermal circulation. We further imply that hydrothermal activity and sulfide deposits may be rather promising along the easternmost SWIR.  相似文献