Impact of coupling coordination development of port and city environments on urban economic competitiveness:Evidence from the coastal port cities in eastern China

Promoting the coupling coordination development of port and its hinterland city environments is an important way to improve urban economic competitiveness.Based on relevant data of 13 coastal port cities in eastern China from 2000 to 2018,this study explores the coupling coordination development of port and city environments and its impact on urban economic competitiveness by constructing the coupling coordination degree model and the panel threshold model.The research results show that:(1)In terms of the coupling coordination development of port and city environments,most coastal ports and their hinterland cities are in a state of moderate or serious disorder.Overall,the degree of coupling coordination of port and city environments needs to be further improved;(2)The coupling coordination degree of port and city environments has a significant impact on urban economic competitiveness,and this effect gradually increases with the development of the ports and the urban economy.Among the variables that impact the urban economic competitiveness,fixed assets investment and foreign trade are significant factors that can enhance urban economic competitiveness.(3)At present,there is a“U-shaped”relationship between the coupling coordination degree of port-city environments and the urban economic competitiveness.This relationship lies on the right side of the inflection point of the“U-shaped”curve.Therefore,following the concept of assigning priority to ecological development,expanding fixed assets investment and actively developing foreign trade can further enhance the urban economic competitiveness.

Preliminary Analysis of Sea Use Planning Strategies in Coastal Cities:A Case Study of Binhai New Area in Tianjin City

Through investigating current sea use in coastal cities of China,and exploring foreign and domestic researches on sea use,this paper took Binhai New Area of Tianjin City for example to analyze major problems of its sea use in ecological security,planar form,land use layout,specialized planning,management and regulatory mechanism,then proposed strategies from 4 perspectives,namely ecological conservation and restoration,optimization of planning planar form,optimization of planning land use layout,and planning management,in order to provide references and instructions for the sea use planning of Chinese coastal cities.

Changes of Wetland Landscape Pattern in New Coastal District of Tianjin City

With the wetland landscape in New Coastal District of Tianjin City as the chief study objective and based on the remote sensing and non-remote sensing data of ETM/TM with 1999-2007 as the time scale and the new administrative region of New Coastal District as the space (scale) scope, this paper conducted the study on the landscape pattern change. The results showed that the natural wetland and agricultural land tended to decrease, while the saltern, maricultural areas and construction land increased apparently. The overall landscape shape tended to develop in simplification and regulation and with the development of population and social economy, human’s intervention to the landscape was getting improved.

Mercury concentration in hair samples from Chinese people in coastal cities

This investigation was made to estimate current normal concentrations of total mercury in the hair of Chinese coastal people. Hair samples were collected from 659 healthy inhabitants in the areas along the coast and the rivers (such as Shanghai, Ningbo, Dalian, Xiamen, and Zhoushan) of China from Feb. 2005 to June 2006. Total mercury concentrations in the samples were analyzed by the cold vapor atomic adsorption spectrometry method (CVAAS). The results showed the geometric mean concentration of total mercur...

Advances and Practices on the Research, Prevention and Control of Land Subsidence in Coastal Cities

Land subsidence severely threatens most of the coastal plains around the world where high productive industrial and agricultural activities and urban centers are concentrated. Coastal subsidence damages infrastructures and exacerbates the effect of the sea-level rise at regional scale. Although it is a well-known process, there is still much more to be improved on the monitoring, mapping and modeling of ground movements, as well as the understanding of controlling mechanisms. The International Geoscience Programme recently approved an international project(IGCP 663) aiming to bring together worldwide researchers to share expertise on subsidence processes typically occurring in coastal areas and cities, including basic research, monitoring and observation, modelling and management. In this paper, we provide the research communities and potential stakeholders with the basic information to join the participating teams in developing this project. Specifically, major advances on coastal subsidence studies and information on well-known and new case studies of land subsidence in China, Italy, The Netherlands, Indonesia, Vietnam and Thailand are highlighted and summarized. Meanwhile, the networking, dissemination, annual meeting and field trip are briefly introduced.

Impact,Mechanism,Monitoring of Land Subsidence in Coastal Cities(Annual Work of IGCP 663)

Land subsidence is a worldwide geohazard consisting in the lowering of the ground surface due to natural and human-induced processes occurring in the shallow and deep subsoil.Over the last two decades,land subsidence has caused damages and widespread impacts to a variety of infrastructures in coastal cities(Ma et al.,2011;Liu et al.,2016;Minderhoud et al.,2018).

The Role of Geomorphological Studies in Development of Coastal Cities

Natural and unnatural factors would develop coastal areas. Coastal area is a region that takes materials and substances from land surface then transfers them to sea and the remained and cumulative substances of them would deform under the effect of erosion forming the coasts appearance. Geomorphology is the study of land and process leading to formation and development of it. Coastal geomorphology emphasizes on formation of coastal areas and some processes such as waves, tides, and stream leading to formation of boulders, coral reefs and sandy beaches. The base of this study is on analytical comparison method of affecting variables on periodic change of shoreline in river estuary in which statistical and image data were analyzed. This research was conducted within three time intervals including 1955-1988, 2000-2006, and 2006-2013. Wind hourly data of Meteorological Organization of Iran was used to study waves. The fluctuation in level of Caspian Sea is an important factor in changes in shoreline of Caspian Sea besides the role of river and providing sediment output into the sea. The most area was belonged to 1995 along with declining trend of seal level of Caspian Sea and the lowest area was belonged to 2000 with a rising trend of sea level within three studied intervals. This point indicates the effect of seal level factor on change in area of studied intervals.

Countermeasure Research on the Drainage and Water-logging Prevention of Coastal Cities:A Case Study of Yingping District in Xiamen

According to the drainage problems emerging from the several torrential rainstorm in domestic coastal cities in the last two years, especially the issues that the drainage and waterlogging prevention of coastal cities are susceptible to the tide level of open seas, this paper took the reconstruction of Yingping District in Xiamen, a typical coastal area, as a case study, analyzed the main waterlogging causes of the district under the influences of the average annual tide level and storm tide caused by typhoon with the application of drainage model, and came up with reasonable implementation strategies for reconstruction;besides, this paper also assessed and divided the waterlogging risks of the district under the influences of storm tide and applied engineering measures as well as non-engineering measures to prevent the urban cities from water-logging hazards. It is expected that the study would provide reference for the reconstruction of coastal cities in drainage and water-logging prevention.

A Comparative Study on the Development of Coastal Tourism Cities in China and Foreign Countries:A Case Study of Qingdao and Hawaii Island

Coastal tourism has become a pillar industry in the economic and social development of China’s coastal areas and an important part of the national Marine strategy.It has a huge development potential and broad space for improvement.There is still a big gap between the development of domestic coastal tourism cities and that of foreign countries.This paper made a comparison between Qingdao and Hawaii Island based on the analysis of Qingdao and Hawaii Island in economy,industry,location,tourism,culture,management system and marketing methods,aiming to provide theoretical suggestions for the development of urban tourism in China.

Qingdao A Coastal Opening City

In eastern China, Qingdao is an important coastal opening city and a hub of the economy. Since 1992 the city government has planned a programme to develop Qingdao into a modern international city focussed on an industrial park, three districts and three strips projects. Under a concerted effort the city’s economic construction and opening up has shown vibrant prospects for development.

Evaluation of harmonious development for economy-environment system in coastal cities: a case study of Tianjin Municipality

With the aim of the harmonious development of economy-environment system in coastal cities in China. an index ,system used to evaluate the economy-environment system is built up in this paper, which includes four aspects： economy, environment, resources, and ocean industry. Based on the analysis on present condition and future trends of economic development in Tianjin and the quantification of various evaluation indices, the aathor applies integrated index valuation model to valuate the harmonious development af economy-environment of Tianjin. The results show that the coordinated degree of economy-environment would drop down in the future, from 0.95（superior level of harmonious development） in 2000 to 0.59（inferior level of harmonious development） in 2015. under the circumstance of the current economic development mode. The level of comprehensive development of Tianjin also presents to descend. Based on the analyzing of status and future trends of environment-economy coordinated development, the paper puts forward the countermeasures such as industry, structure adjustment, increasing the level of environmental protection investment, strengthening the enforcement of en vironmental policies to improve the coordinated development of environment-economy in Tianjin municipality.

我国沿海地区城市洪(潮)涝成因及应对策略——以深圳市为例

沿海地区受地理位置、全球气候变化和城市化快速发展等影响,城市洪(潮)涝灾害频发,已成为影响我国沿海地区城市公共安全的突出问题,严重制约经济社会可持续健康发展。根据城市水文循环过程,综合考虑致灾因子、孕灾环境和承灾体等,将沿海地区城市洪(潮)涝成因概括为“先天不足—后天变化”两个方面,并以深圳市为例进行了深入分析。在此基础上,从提高防洪(潮)和排涝能力,协调防洪、除涝、排水标准,科学规划城市发展,充分考虑地下空间竖向设计,全面加强流域统一管理5个方面提出沿海地区城市洪(潮)涝应对策略,为沿海地区城市防洪(潮)、除涝工程体系建设和城市洪(潮)涝风险管理提供支撑。

依嵌而融:东部沿海城市各民族交往交流交融的多维互嵌要素研究

东部沿海城市已成为各民族交往交流交融和全方位相互嵌入的重要场域。人口要素、空间互嵌、经济互嵌和文化互嵌构成了民族交往交流交融的社会基础、场域环境、物质条件和精神依归。以天津市为例,在人口基础要素方面,民族成份齐全多元,少数民族流动人口规模增长较快等,使得各民族社会交往的人口资源增量较为丰富。在空间互嵌环境方面,民族空间交往的场域环境存具区际分布结构、民族聚居结构和社区互嵌结构的差异性。在经济互嵌条件方面,民族就业领域存在集中化现象,各民族围绕职业领域和就业分布进行民族生产交往。在文化互嵌依归方面,通过各民族文化互嵌共生,强化中华文化认同与国家认同教育,增进了民族精神交往。要坚持“并重”思维,理性看待民族就业分布集中化现象,在把握客观规律的基础上建设民族互嵌式社区,顺势而为地推动东部沿海城市各民族广泛交往、全面交流和深度交融。

基于机器学习的涉海企业类型识别及其空间组织特征的城市比较研究

在推进海洋强国建设的进程中,海洋产业是海洋经济增长的最直接对象,而其空间布局与产业组织特征的研究是最具基础性的工作之一。选取4个代表性城市为研究区,基于海洋企业的工商登记信息,爬取空间坐标构建POI产业信息数据库。使用人工神经网络等机器学习算法识别各企业所属的行业,综合运用GIS空间分析方法,分析海洋产业集群的空间分异性规律。结果表明:1)从空间格局特征看,总体呈“大分散、小集聚”的均衡格局,多类别对比显示企业选址存在行业集聚性,同时具有空间极化特征,陆海关系上体现为海岸带高密度单峰或“海岸带-市中心”双峰分布格局。2)从空间组织模式看,产业集群存在与人口规模、行政等级相对应的多层次等级位序特征;除单核心结构外,多核心结构中一般表现为“主-次双核心”或者“一主多次放射状”,核心区间产生空间联系形成多节点的轴线或网络结构。3)从空间匹配关系看,椭圆面积与城市面积呈正相关,椭圆长轴方向与海岸线延伸方向相近,产业分布与城市行政中心、港口等交通枢纽、海湾地形、海岸线等空间要素存在明确的匹配关系。

变化环境下长江流域滨海城市供水安全与适应性对策

全球气候变化和高强度人类活动影响导致长江流域水循环变化及相关联的城市群水资源供需矛盾问题,尤其在长江下游上海等滨海城市供水安全问题更加凸显,这已成为长江大保护十分关注的重要问题之一。以典型滨海城市上海为例,重点论述变化环境对长江流域的供水安全风险问题;分析当前和未来上海城市供水极端干旱影响、长江淡水与河口咸潮互动供水窗口压力,以及上海城市供水管理综合运用工程措施和预警预报、调度等非工程措施的挑战;提出若干对策与建议,包括供水安全保障的系统思维与战略规划、提升城市供水安全的系统智能化与智慧化管理水平以及完善供水安全保障的管理体系。

港城环境协调发展对城市经济竞争力影响的门限效应分析

基于2000~2021年中国东部地区13个沿海港口城市相关数据,构建协调度模型和面板门限模型,探析港城环境协调发展及其对城市经济竞争力的影响。研究结果表明:1)在港城环境协调度等级上,东部地区大多数港口与其腹地城市处于中度失调或严重失调阶段,整体上港城环境协调发展程度有待提升;2)港城环境协调度对城市经济竞争力具有显著影响,并且随着港口和城市经济发展,这种影响效应略微减弱,在协调度的影响变量中,固定资产投资、对外贸易是提升城市经济竞争力的显著因素;3)目前沿海港口城市港城环境协调度和城市经济竞争力之间呈“U”型关系,且处于“U”型曲线拐点右侧,因此,需坚持生态优先发展理念、扩大固定资产投资和积极发展对外贸易,以进一步提升城市经济竞争力。

厦门市滨海运动休闲城市规划与开发研究

为更好地发展厦门市滨海运动休闲城市,采用城市规划原理与方法,结合文献资料、实地调查等方法,以厦门市滨海城市发展目标为依据,分析厦门滨海湾区发展现状和特点,讨论厦门滨海运动休闲旅游城市高质量发展的优势。在此基础上提出开发厦门滨海运动休闲城市专项规划和运动休闲项目配套实施的构想,旨在为体育学科与现代城市规划设计融合发展提供参考。

沿海城市数字技术效率差异分解及收敛性分析

在数字技术领域沿海城市发展水平存在着较大差距,剖析数字技术效率差异来源及收敛性特征,有助于加快我国“智慧海洋城市”建设。为此,文章基于2013—2019年53个沿海城市的面板数据,构建投入产出分析框架,利用基于非期望产出的超效率SBM模型和Malmquist指数对数字技术效率进行静态和动态测算,并依据行政级别的不同,利用Kernel核密度估计法、Dagum基尼系数、σ收敛与β收敛研究沿海城市数字技术效率动态演进、差异分解及收敛性分析。结果发现:(1)沿海城市数字技术效率处于波动上升态势,主要由技术进步拉动,其中上海市数字技术效率稳定地达到DEA有效状态。(2)沿海城市总体数字技术效率差异存在扩大趋势,主要由区域间差异造成,分布有明显的右拖尾特征,存在向右移动趋势。(3)沿海城市数字技术效率β收敛特征明显,不存在σ收敛。文章的研究为提高沿海城市数字技术效率和“智慧海洋城市”建设提供理论支撑和实证依据。