Application of Cellular Automata and Markov Chain model for urban green infrastructure in Kuala Lumpur,Malaysia

Kuala Lumpur of Malaysia,as a tropical city,has experienced a notable decline in its critical urban green infrastructure(UGI)due to rapid urbanization and haphazard development.The decrease of UGI,especially natural forest and artificial forest,may reduce the diversity of ecosystem services and the ability of Kuala Lumpur to build resilience in the future.This study analyzed land use and land cover(LULC)and UGI changes in Kuala Lumpur based on Landsat satellite images in 1990,2005,and 2021and employed the overall accuracy and Kappa coefficient to assess classification accuracy.LULC was categorized into six main types:natural forest,artificial forest,grassland,water body,bare ground,and built-up area.Satellite images in 1990,2005,and 2021 showed the remarkable overall accuracy values of 91.06%,96.67%,and 98.28%,respectively,along with the significant Kappa coefficient values of 0.8997,0.9626,and 0.9512,respectively.Then,this study utilized Cellular Automata and Markov Chain model to analyze the transition of different LULC types during 1990-2005 and 1990-2021 and predict LULC types in 2050.The results showed that natural forest decreased from 15.22%to 8.20%and artificial forest reduced from 18.51%to 15.16%during 1990-2021.Reductions in natural forest and artificial forest led to alterations in urban surface water dynamics,increasing the risk of urban floods.However,grassland showed a significant increase from 7.80%to 24.30%during 1990-2021.Meanwhile,bare ground increased from 27.16%to 31.56%and built-up area increased from 30.45%to 39.90%during 1990-2005.In 2021,built-up area decreased to 35.10%and bare ground decreased to 13.08%,indicating a consistent dominance of built-up area in the central parts of Kuala Lumpur.This study highlights the importance of integrating past,current,and future LULC changes to improve urban ecosystem services in the city.

The Role of Green Infrastructure in Mitigating the Urban Heat Island Effect

The accelerating urbanization process and intensifying climate change have exacerbated the urban heat island effect, threatening sustainable urban development. This study investigates the role of green infrastructure in mitigating urban heat island effects, its implementation challenges, and applications. Employing a system dynamics approach, the research models the relationships between green infrastructure, urban microclimate, and human well-being. Findings indicate that large, continuous green spaces, such as urban parks and green corridors, are most effective, potentially reducing surrounding temperatures by 1˚C - 4˚C. Green infrastructure also provides multiple ecosystem services, including improved air quality and increased biodiversity. However, its implementation faces challenges such as land resource limitations and financial constraints. To address these issues, the study proposes a performance-based planning method, emphasizing multifunctional design and cross-sectoral collaboration. Through analysis of international and Chinese urban case studies, best practices and lessons learned are summarized. The research demonstrates that successful strategies must be context-specific, integrating local conditions while emphasizing long-term planning and continuous optimization. This study provides a scientific basis for developing effective heat island mitigation strategies and climate adaptation plans, ultimately achieving sustainable urban development and improved living environments.

Is the Urban Shrinkage Inhibits the Improvement of Public Service Level?

Public services provide convenient conditions for urban residents to study,work and live,and have important significance for improving the life quality of residents and improving the level of welfare.However,while China’s spatial economic is heading towards agglomeration development,a large number of cities have shrunk,which has made unbalanced supply of public services between regions increasingly prominent.Based on the existing literature and the development reality,this paper analyzes the impact of urban shrinkage on the public service level from the public service supply mechanism,and discusses the heterogeneous effects of different labor shrinkage on public services.The results of the study show that urban shrinkage will inhibit the improvement of public service level,but inter-governmental competition makes the labor shrinkage of industry and service industry promote the improvement of public service level.In addition,this paper takes economic development level as a moderating variable to study the moderating effect of economic development level in the impact of urban shrinkage on public service levels.It is found that the reduction of economic development level will promote government competition and provide more public services.

Examining the Level of Service in the Context of Recreational Carrying Capacity in the Erzurum Urban Forest,Turkey

Urban forests are confronted with high using pressure because of the increasing demand for recreation and accessibility of these settings. For that purpose, defining and managing recreational carrying capacity is considered as significant in ensuring ecological value’s and recreational satisfaction’s continuity. The purpose of this paper is to investigate the carrying capacity of Erzurum Urban Forest with respect to Level of Service (LOS) as a new management technique that focuses on service quality and visitor satisfaction. The data were obtained by self-administered questionnaire conducted with 166 visitors on weekends and holidays during summer season of the year 2014. Data were analyzed by dimensions/indicators of recreational satisfaction and socio-demographic characteristics with intent to identify tolerance range of visitors. The contribution and relative importance of each of the indicators to the overall satisfaction were analyzed by using Ordinal Logistic Model (OLM). The results indicated that the four indicators were at the greatest degree;“distance from picnic spot to toilets” and “quantity of children’s playground facilities” were decease of overall satisfaction while “distance from picnic spot to parking” and “level of shade at picnic spot” had a positive contribution to the overall satisfaction. The outputs from these analyses were used to calculate LOS. It was revealed that the level of service (0.40) in Erzurum Urban Forest was below the moderate level. Planning and managing strategies for optimizing the LOS were developed and discussed by considering these results.

Enhancing coastal areas governance for sustainable tourism in the context of urbanization and climate change in eastern Thailand

Coastal areas in the eastern sub-region of Thailand,a popular destination in Southeast Asia,are facing rapid tourism-related urbanization and associated consequences of environment and climate change(CC).Thus,this study aims to analyze the relationships between tourism,coastal areas,the environment,and CC in the context of tourism urbanization;and recommend strategies for enhancing the governance of coastal areas.Three popular destinations were selected as study areas,Koh Chang,Koh Mak,and Pattaya.Group discussions,questionnaire surveys,in-terviews,and observation were used for primary data collection together with secondary data.The results show that the development of these destinations has been incompatible with the coastal environment and CC patterns.Rapid urbanization from tourism development is the main driver of environmental changes and makes the areas vulnerable to CC-related risks.While water scarcity and pollution are found the most critical environmental issues of the destinations,coastal areas are negatively affected in terms of increased air and water pollution and resource degradation.They have also been exposed to different CC-related problems while the risks of accumulative impacts of both environment and CC have not been adequately recognized or addressed.Although some measures have provided synergies of improved environment and increased climate resilience,possible conflicts and gaps were also found.Public infrastructure integration and optimization to enhance coastal areas'environment and climate resilience are suggested.

Congestion Pricing of Urban Street Segments along with MRT Route—The Case Study of Dhaka, Bangladesh

Dhaka, Bangladesh’s capital, already has a congestion problem to handle the ever-growing demand for traffic. The usage of private cars cannot be stopped by charging and the town is not encouraged by quality public transport. It is impossible to enforce congestion prices here in line with traditional cordon pricing systems since the region uses unusual land patterns. However, the current project Mass Rapid Transit (MRT) Line 6, which will be built by 2021, provides the prospect of congestion pricing. A price and optimum approach were established for this article. The congestion price is only payable for the segments and is accessible for private cars under this system. Two urban street segments along the MRT route were selected for the study and congestion toll for a private car is estimated for each segment separately. The sum of the toll in monetary terms is determined using certain associated parameters from the discrepancy from the actual Level of Service (LOS) travel time and traffic flow to the desired LOS. The outcome has shown that the price per passenger car is $0.3 - $0.44. The price is flexible, which means it will vary based on traffic volume. The findings for politicians to enforce congestion pricing are viewed as recommendations.

The Planned Conservation of the Urban Fortifications of Tuscany: Satellite Interferometry as an Innovative Monitoring Technology for Asset Management

The “Monitoring City Walls” research project by the University of Pisa approaches planned conservation as a process that pursues an in-depth understanding of historic city walls and their surroundings to define a system of effective risk prevention. This multidisciplinary research adopts monitoring strategies and technologies at the large scale and in relationship to natural and urban conditions. The underlying logic frames the conservation of these historic fortifications within the more general mitigation of risks generated by context. The research aims to develop an innovative approach to monitoring ancient defensive structures in historical towns. The integrated use of advanced technologies allows for the control and, most importantly, advance identification of possible risks. These new technologies, in particular satellite interferometry, make it possible to improve and increase the operational capacity of monitoring processes by facilitating the acquisition and investigation of data relative to the system defined by ancient city walls and their surroundings. These technologies also represent a cost-effective tool for managing the important transition from the observation and study of individual monuments to the monitoring of large monumental complexes or even entire historical centers.

成都市主城区绿色基础设施遥感解译及其生态服务现状研究

城市绿色基础设施(Urban Green Infrastructure,UGI)的广泛应用,正在持续重塑全球城市景观,对城市生态系统服务产生重要影响。成都作为紧邻川西高原的内陆盆地城市,其城市景观在UGI构成的多样性等方面与中国其他城市具有显著差异。以成都城市景观为中心展开综合调查,使用地理信息系统、生态服务建模和空间分析来量化UGI对生态服务的影响,并采用系统化方法将UGI整合到优化城市生态系统服务的规划建议中,为快速城市化中的成都主城区UGI空间布局优化,特别是空间聚集程度冷点区域改善,提供具体的解决策略。总结出三个关键趋势:(1)成都市的土地利用发生了重大变化,以城市区域绿色空间的显著缩小和建设用地的显著扩大为特征,主要归因于人口增长和土地利用模式的变化;(2)空间聚集程度热点和冷点的调查分析显示,主城区大多数温度冷点位于成都的东部,而基于其价值的热点最高集中度位于南部地区;(3)对UGI内碳密度的分析显示,生态系统服务集中度的峰值出现在城市中心区域。

优化县域义务教育资源配置的实践审视与路径

我国义务教育实行“以县为主”的管理体制。随着学龄人口的变化、新型城镇化的发展、地方财政紧缩以及义务教育优质均衡发展的要求,县域义务教育学校出现“城挤、乡弱、村空”的现象,义务教育资源配置面临新的挑战。各地在优化县域义务教育资源配置时,注重党政协同推进,强化办学标准引领,完善配套服务与加大投入力度,教育资源整合有力促进了义务教育优质均衡发展。同时,建立同人口变化相协调的基本公共教育服务供给机制,需要理性看待和因地制宜推进新一轮乡村学校布局调整,加强顶层设计,完善县域义务教育学校办学标准;加大教育投入,改进县域义务教育经费保障机制;统筹师资配置,促进县域义务教育强校提质扩优;盘活闲置资源,出台闲置校舍处置指导意见。

贵州省公共服务设施空间优化配置策略研究

贵州作为西部欠发达山区省份,城镇化发展水平相对滞后,公共服务设施配置水平有待提升。本文以贵州省为例,开展公共服务设施空间优化配置研究,对医疗卫生设施、教育设施、社会福利设施和文化体育设施四类基本公共服务设施现状服务水平、服务效率、空间布局进行分析,总结发展特征和问题,依据贵州城镇化趋势和新时代城镇发展要求,明确发展目标,从服务水平提升、空间布局优化方面提出贵州省公共服务设施优化提升策略,为贵州省公共服务设施体系建设高质量发展提供思路参考。

Ecosystem service of green infrastructure for adaptation to urban growth:function and configuration

Objectives:(1)to explore what kind of green infrastructure(GI)meets the demand for urban ecological security of rapid urbanization areas;(2)to figure out how to determine the specific function and configuration of GI from ecosystem service requirements of urban ecological security.Methods:(1)Through the literature review,this article summarizes the function and structure evolution of GI in order to adapt to urban growth.(2)Standing on the imperfect ecological functions and unreasonable spatial configurations,this article builds up a conceptual model for the optimization of green infrastructure ecosystem services to meet the demand for the green infrastructure pattern needed by urban growth.Results:The optimization framework consists of four central function modules and its regulating and controlling mechanisms,incuding:(1)Balancing supply and demand of GI's ecosystem service;(2)Measuring and evaluating GI's ecosystem services;(3)Elevating and optimizing GI's ecosystem service;(4)Building urban ecological security patterm with high efficiency of GI's ecosystem services.Moreover,this framework provides guidance for the planning and design of GI and the urban ecological security pattern building in rapid urbanization areas based on ba lancing supply and demand of GI's ecosystem services.Conclusion:The conceptual model of Gl's ecosystem service optimization based on balan-cing supply and demand shows a new path to meet the needs of urban growth and build a city's ecological security pattern through upgrading and optimizing GI.

Hallmark of a Resilient City: Adoption of Green Infrastructure in African Cities

Dynamic urbanization of African cities has created development trajectories that face systemic challenges in the provision of sustainable and ecologically resilient urban environments. The specific challenges include extensive unregulated growth with informal settlements reflecting poor service levels and high poverty indices, inadequacy in provision of basic services in health, water, housing, transport and communication infrastructure, high reliance on biomass fuels, exposure to environmental stress and implausible climate change coping and mitigation mechanisms among others. Review of extensive literature and synthesis of existing bodies of knowledge on the ecological and management perspectives of urban environments revealed many gaps and understanding of urban transformation processes. The purpose of this review was to contextualize credible pathways for optimization of both ecosystem goods and services from green urban landscapes (Green infrastructure) and non-green infrastructure to ensure sustainable and ecologically resilient urban environments. Attempts were made to rationalize and validate through discussions the benefits of managed urban ecosystems for African cities. On the basis of the evidence from the literature, it is concluded that urban development trajectories that do not embrace multifaceted approaches that deliberately retain and maintain green infrastructure in the urban environment may not be cost-effective. It is recommended that systematic integration of urban forestry concepts in urban planning that involves communities, local and national governments, business entrepreneurs and public and private research institutions provides tenable frameworks for addressing current and future challenges of urbanization in Africa.

数字基础设施建设对城市绿色创新效率的影响——基于“宽带中国”战略试点政策的准自然实验

本文基于我国280个地级及以上城市2006~2021年的面板数据,利用多期双重差分模型考察“宽带中国”战略试点政策实施对城市绿色创新效率的影响效应、内在机制及异质性表现。研究发现:(1)“宽带中国”战略试点政策实施对城市绿色创新效率具有显著的提升作用,并且在一系列稳健性检验后结果依然稳健;(2)劳动力流动和生产性服务业集聚是“宽带中国”战略试点政策实施提高城市绿色创新效率的两种机制;(3)“宽带中国”战略试点政策实施对城市绿色创新效率的促进作用在东部城市、大规模城市、非资源型城市中更强;(4)正式环境规制和非正式环境规制正向调节“宽带中国”战略试点政策实施对城市绿色创新效率的驱动作用。本文为推动数字基础设施建设以及城市绿色创新效率的提升提供了重要政策启示。

数字基建对城乡基本公共服务均等化的影响研究——来自“宽带中国”准自然实验的证据

实现城乡基本公共服务均等化是解决我国发展不平衡不充分问题的重要举措,是扎实推进共同富裕的关键抓手,当前快速发展的数字基建已成为促进基本公共服务均等化的新引擎。以“宽带中国”示范城市创建政策为准自然实验,选取我国2011—2020年地级以上城市面板数据为研究样本,采用双重差分法实证检验数字基建对城乡基本公共服务均等化的影响及作用机制。研究结果表明:数字基础设施的建设与应用有效促进了城乡基本公共服务均等化,该结论经稳健性检验后依然成立;数字基建对我国中部地级市、传统基建较好地级市、高城镇化水平地级市的城乡基本公共服务均等化驱动效应更强。机制检验进一步表明,数字基础设施的建设与应用通过提升基本公共服务供给效率、缓解财政支出城市偏向、加速乡—城人口流动促进城乡基本公共服务均等化。基于此,提出加快数字基础设施建设与应用、加大农村基本公共服务供给力度、推进新型城镇化建设等政策建议。

住房压力如何影响青年流动人口的落户意愿--基于城市公共服务水平的调节效应分析

利用2017年中国流动人口动态监测数据匹配我国284个地级市及以上城市数据,考察住房压力对青年流动人口落户意愿的影响及城市公共服务水平的调节效应。研究发现:住房压力与青年流动人口落户意愿之间呈倒U型关系;城市公共服务水平能够延缓住房压力对青年流动人口落户意愿负面影响的发生。进一步分析表明,青年流动人口户籍所处地理位置与居住证办理情况均能在不同程度上影响城市公共服务的调节效果。

城市群集聚规模对城市工资水平的影响研究

城市群是城市发展的高级形态,近年来,随着我国城市发展水平的不断提高,城市群在区域经济中的地位日益突出。为了更好理解城市群的影响,以我国城市群作为研究对象,选取了相关城市2007-2021年的面板数据,对城市群集聚规模影响城市工资水平的方向和路径进行了实证分析。研究结果表明:城市群集聚规模对城市工资水平存在着显著的正向影响,且这种影响是异质的;城市群集聚规模主要通过推动城市产业升级和提升城市创新能力两种途径促进城市工资水平的提高。

城市空地更新为绿色基础设施的潜力评估

【目的】绿色基础设施(green infrastructure, GI)更新是解决收缩城市空地问题的有效手段,对城市生态系统有功能融合与结构调整的作用。【方法】从功能与结构视角,评估黑龙江省鹤岗市中心城区空地的生态系统服务供给能力和景观连通性,通过多因子叠加分析法评估城市空地更新为GI的潜力。【结果】鹤岗市中心城区生态系统服务供给能力较强的空地占比26.47%,景观连通性较强的空地占比16.26%,整体更新潜力不高,具有较高更新潜力的空地仅占22.19%,主要为面积较大的空地。【结论】通过构建城市空地更新为GI的潜力评估体系,提出了增加式、合并式、插入式与预留式空地更新模式,以及收缩城市空置用地更新的针对性规划策略,可为收缩城市空地再利用的规划实践与GI格局优化提供依据。

长三角城市群A级旅游景区时空异质性研究

城市群A级旅游景区演化研究对促进区域旅游业平衡充分发展具有重要价值.基于目的地多尺度、景区多等级及空间非稳定现实,运用多种空间分析方法,对长三角城市群A级旅游景区及影响因素的时空异质性进行研究.结果表明:(1)2001-2021年,3A、4A是长三角城市群A级旅游景区结构主体;上海、杭州、湖州、南京、安庆、金华、温州和台州的各级景区发展均较好.(2)长三角城市群A级旅游景区空间分布集聚性显著,逐渐形成“几”字形高密度景区带结构;各等级景区辐射范围不断扩大,形成东南-西北方向分布格局;城市尺度上,各等级景区都趋于均匀分布.(3)至2019年,影响A级旅游景区空间分布的因素包括旅游资源、旅游需求、旅游地交通及社会经济条件.各个因素的影响程度及其在空间上的异质性均随时间变化而变化.

城市绿色基础设施政策工具的系统综述和研究前沿分析

【目的】城市绿色基础设施政策工具是由政府主导实施的促进城市绿色基础设施建设的重要手段。【方法】以绿色基础设施政策工具为研究对象,借助Bibliometrix R Package软件和CiteSpace软件,以文本检索、计量分析、编码分类为研究线索,深入剖析了12项代表性城市绿色基础设施政策工具的发展历程,对比其发展历程、指标体系、绩效评估方式和政策管控路径的优势和劣势,探究绿色基础设施建设管理与生态系统服务目标有机结合的途径和方式。【结果】1)城市绿色基础设施政策工具的目标定位从解决单一雨水问题转向评估生态系统服务多重效益。2)政策指标初期包括植物、水系和土壤元素,后期逐步形成包括地表复层植被、地表蓝绿设施、建筑垂直绿化、建筑绿色屋顶项目元素,以及直接干预、动物介入管理元素的层级体系。3)城市绿色基础设施政策工具有强制约束土地利用的“一致性”和间接鼓励的“描述性”2种模式,结合了标准权重和绩效阈值2种互补的城市开发项目筛选机制,工具应用于规划、建设、管控、监测全周期过程。4)结合生态系统服务需求,校准城市绿色基础设施政策工具的绩效评估权重已成为迫切需求。【结论】城市绿色基础设施政策工具将成为应对全球问题和城市挑战的有力手段,揭示其管控落实过程的多元思路,可为城市绿色基础设施优化与完善提供政策指引和技术支持。

基础设施分形对超大城市规模边界的影响

基础设施分形是超大城市规模边界的重要影响因素。通过构建基于基础设施分形理论的城市发展模型分析发现,基础设施分形从人口异速增长、社会系统熵增和社会网络结构改变等方面,对超大城市规模边界产生重要影响。随着现代科技的发展,新型基础设施正替代传统基础设施,成为决定城市规模边界的核心要素。当前,应顺应科技革命趋势,加速推进基础设施优化升级,实施全周期、数字化治理,构建新型基础设施体系,重塑超大城市规模边界。