Spatial pattern of urban green spaces in a long-term compact urbanization process—A case study in China

Sun, Caige; Lin, Tao; Zhao, Qian; Li, Xinhu; Hong, Ye; Zhang, Guoqin; Liu, Xiaofang; Zhao, Yu

doi:10.1016/j.ecolind.2017.09.043

Cited by 51 publications

(32 citation statements)

References 36 publications

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“…This has resulted in a huge waste of land and energy resources, and has caused ecological damage around the city. As a result, there is a trend towards developing compact urbanization and an urgent need to assess the land cover evolution within built-up [20] areas. Using remote sensing image data to determine urban built-up area boundaries (UBAB) is an important process for analysis of LCE and compact urbanization.…”

Section: Introductionmentioning

confidence: 99%

Analysis of land cover evolution within the built-up areas of provincial capital cities in northeastern China based on nighttime light data and Landsat data

et al. 2020

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Mastering the evolution of urban land cover is important for urban management and planning. In this paper, a method for analyzing land cover evolution within urban built-up areas based on nighttime light data and Landsat data is proposed. The method solves the problem of inaccurate descriptions of urban built-up area boundaries from the use of single-source diurnal or nocturnal remote sensing data and was able to achieve an effective analysis of land cover evolution within built-up areas. Four main procedures are involved: (1) The neighborhood extremum method and maximum likelihood method are used to extract nighttime light data and the urban built-up area boundaries from the Landsat data, respectively; (2) multisource urban boundaries are obtained using boundary pixel fusion of the nighttime light data and Landsat urban built-up area boundaries; (3) the maximum likelihood method is used to classify Landsat data within multisource urban boundaries into land cover classes, such as impervious surface, vegetation and water, and to calculate landscape indexes, such as overall landscape trends, degree of fragmentation and degree of aggregation; (4) the changes in the multisource urban boundaries and landscape indexes were obtained using the abovementioned methods, which were supported by multitemporal nighttime light data and Landsat data, to model the urban land cover evolution. Using the cities of Shenyang, Changchun and Harbin in northeastern China as experimental areas, the multitemporal landscape index showed that the integration and aggregation of land cover in the urban areas had an increasing trend, the natural environment of Shenyang and Harbin was improving, while Changchun laid more emphasis on the construction of artificial facilities. At the same time, the method proposed in this paper to extract built-up areas from multi-source city data showed that the user accuracy, production accuracy, overall accuracy and Kappa coefficient are at least 3%, 1%, 1% and 0.04 higher than the single-source data method.

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Section: Introductionmentioning

confidence: 99%

Analysis of land cover evolution within the built-up areas of provincial capital cities in northeastern China based on nighttime light data and Landsat data

et al. 2020

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“…Regarding the limited land space available, and the goal of maximizing the ecological service function of trees to improve air quality, there is a lack of comprehensive analysis on how many trees to plant and where to plant them. Such problems are prevalent throughout China [22,23].Research on urban forest spatial distribution focuses on landscape management and urban planning [24][25][26]. Developed countries have a long history of thinking about green space layout.…”

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confidence: 99%

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confidence: 99%

GIS-Based Urban Afforestation Spatial Patterns and a Strategy for PM2.5 Removal

Zhou

Liu

Zhou

et al. 2019

Forests

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Within the scope of ecological development planning in China, afforestation is highly valued. However, the scientific planning of afforestation still has inadequacies. There are few studies on the spatial distribution of urban forests targeted at air quality improvement. Here, we implemented a virtual experiment to evaluate whether different tree planting distribution plans with the same afforestation scale would have a significant effect on fine particulate matter (PM2.5) removal. As a case study of Wuhan, this paper identified the statistical regularity between PM2.5 concentration and adsorption of representative trees through field sampling and measurement, simulated the influence of different afforestation plans on PM2.5 concentration based on Geographic Information System (GIS), judged the significance of the difference of the plans, and proposed a greening distribution strategy. The results show that different forest layouts had no significant impact on PM2.5 in the administrative region, and the concentration reduction rate was only 1%–2%. Targeted planting of trees in heavily polluted areas in the city center would have achieved better air quality improvement, with a reduction rate of 3%–5%. In Wuhan construction areas, trees should be planted to increase the forest coverage rate to 30%. The edge of the urban metropolitan development zone needs to be strengthened with trees to form a forest belt 10 km–20 km wide, with a forest coverage rate of at least 60%. In general, the capability of trees to reduce PM2.5 concentration is weak. The fundamental way to improve air quality is to reduce emissions; planting trees is only an auxiliary measure. More ecological forest functions should be considered in city-wide afforestation distribution.

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“…Dessa forma, parte-se da lógica de que o aumento da densidade é tão necessário quanto a presença de áreas verdes intraurbana para se alcançar, concomitantemente, maior sustentabilidade e resiliência. Portanto, enfrentar o desafio de conciliar o necessário aumento de densidade habitacional e oferta de áreas vegetada de forma equitativa e inclusiva se torna de suma importância para o futuro das cidades (ARTMANN;FAN, 2019a;HAALAND;VAN DEN BOSCH, 2015;SUN et al, 2019;XU;PAULEIT, 2018).…”

Section: Introductionunclassified

“…Pesquisadores que buscam soluções para esta aparente contradição, a partir de diferente métodos, escalas e perspectivas (ARTMANN et al, 2019;BYRNE;SIPE;SEARLE, 2010;GAVRILIDIS et al, 2019;SUN et al, 2019), poucos se aprofundaram na matriz urbana, mais especificamente na relação entre quantidade/configuração dos espaços verdes residenciais, densidade e morfologia urbana na microescala urbana (SUN et al, 2019) . Ou seja, pouco se investiga sobre os motivos que levam diferentes arranjos e padrões morfológicos urbanos, com densidades similares, a ter taxas de cobertura arbórea e vegetal tão distintas entre si.…”

Section: Introductionunclassified

Cidades compactas e mais verdes: conciliando densidade urbana e vegetação por meio do desenho urbano

Sanches¹

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Enfim, tese concluída! Uma trajetória longa, de anos, que só quem aceita este desafio e adentra este universo, sabe do valor e de todo o esforço envolvido. Porém, não se faz pesquisa somente pela dedicação e esforço do pesquisador. Inúmeras pessoas, condições e acontecimentos corroboraram para o andamento, o sucesso e a conclusão deste doutorado. Por isso, antes do leitor embarcar nesta leitura, não posso deixar de registrar meus profundos agradecimentos a todos os envolvidos: À meu orientador, Demóstenes Ferreira da Silva Filho, por acreditar no meu potencial e confiar em todas minhas decisões, pelo companheirismo e apoio em todos os momentos de dúvidas, incertezas e de conquistas. Ao técnico, Jefferson Polizel e aos professores do Departamento de Ciências Florestais-ESALQ-USP, bem como aos colegas, Eduardo Alexandrino, Marcela Locatelli e Welinton Hirai da ESALQ-USP, pelo conhecimento compartilhado, assistência, dedicação e amizade. Aos colegas do Laboratório de Silvicultura Urbana e à assistente de pós-graduação, Giovanna Oliveira, pela ajuda técnica e administrativa e à amizade, os quais colaboraram na construção de um ambiente produtivo e de harmonia. À Universidade de São Paulo, pela infraestrutura e apoio financeiro para a condução e execução de diversas etapas do doutorado. Aos colegas e professores de outras universidades brasileiras, como Maurício Cetra, Felipe Martello,

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Spatial pattern of urban green spaces in a long-term compact urbanization process—A case study in China

Cited by 51 publications

References 36 publications

Analysis of land cover evolution within the built-up areas of provincial capital cities in northeastern China based on nighttime light data and Landsat data

Analysis of land cover evolution within the built-up areas of provincial capital cities in northeastern China based on nighttime light data and Landsat data

GIS-Based Urban Afforestation Spatial Patterns and a Strategy for PM2.5 Removal

Cidades compactas e mais verdes: conciliando densidade urbana e vegetação por meio do desenho urbano

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