From quantity to quality: enhanced understanding of the changes in urban greenspace

Wang, Jing; Zhou, Weiqi; Jia, Wentao; Qian, Yuguo

doi:10.1007/s10980-019-00828-5

Cited by 23 publications

(23 citation statements)

References 68 publications

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“…Therefore, the potential heat mitigation suggested by the results study is not attainable in a scenario of severe infill development. Additionally, densification strategies should consider that newly created urban green space might result in less provision of ecosystem services than remnant natural patches [25, 66, 67]. Finally, infilling might exacerbate the unevenness of the accessibility to green areas by depriving dwellers of the most dense parts in city core from their few remaining urban green spaces.…”

Section: Discussionmentioning

confidence: 99%

Evaluating urban greening scenarios for urban heat mitigation: a spatially-explicit approach

Bosch¹,

Locatelli²,

Hamel³

et al. 2020

Preprint

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Urban green infrastructure, especially trees, are widely regarded as one of the most effective ways to reducing urban temperatures in extreme heat events, and alleviate its adverse impacts on human health and well-being. Nevertheless, urban planners and decision-makers are still lacking methods and tools to spatially evaluate the cooling effects of urban green spaces and exploit them to assess greening strategies at the urban agglomeration scale. This article introduces a novel spatially-explicit approach to simulate urban greening scenarios by increasing the tree canopy cover in the existing urban fabric, and evaluating their heat mitigation potential. The latter is achieved by applying the InVEST urban cooling model to the synthetic land use/land cover maps generated for the greening scenarios. A case study in the urban agglomeration of Lausanne, Switzerland, illustrates the development of tree canopy scenarios following distinct spatial distribution strategies. The spatial pattern of the tree canopy strongly influences the human exposure to the highest temperatures, and small increases in the abundance of tree canopy cover with the appropriate spatial configuration can have major impacts on human health and well-being. The proposed approach supports urban planning and the design of nature-based solutions to enhance climate resilience.

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Section: Discussionmentioning

confidence: 99%

Evaluating urban greening scenarios for urban heat mitigation: a spatially-explicit approach

Bosch¹,

Locatelli²,

Hamel³

et al. 2020

Preprint

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“…Such high dynmism could potentially influence the quality of UG and thereby ecosystem services ( Zhou et al 2017a). For example, the newly created UG patches may have lower quality than the currently/ previously existing ones (Wang et al 2019), and provide less ecosystem services (Sun and Chen 2017). This warrants further research in the future.…”

Section: The Implications Of Urban Planning and Managementmentioning

confidence: 99%

Spatial distribution of urban greenspace in response to urban development from a multi-scale perspective

Wang

Zhou

Wang

et al. 2020

Environ. Res. Lett.

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Urban expansion and renewal are one of the major drivers affecting urban landscapes worldwide. Considerable research has been conducted to understand how urban greenspace (UG) changes in response to urbanization at various scales from individual patches to landscapes. However, most of these studies have been conducted at a single scale, and little is known from a multiple scale perspective. Here, we present a multi-scale analytical framework to quantify the spatial pattern of greenspace and its change by integrating rank-size distribution, urban-rural gradient analysis and hotspots analysis. We applied this framework to nine major Chinese cities using 2.5 m resolution Advanced Land Observation Satellite and Systeme Probatoire d'Observation de la Terre imagery captured in 2005 and 2010. We found the multi-scale assessment provides integrated and synthesized information about the dynamics of UG that would otherwise be missed. First, the hotspots analysis revealed dramatic change in UG for all the nine cities, and such change tended to be spatially clustered. Second, the spatial heterogeneity of UG decreased from 2005 to 2010 for all the cities as a result of the increase of UG in urban core areas and loss of UG in the urban periphery, resulting in landscape homogenization along the urban-rural gradient. Third, substantial loss of UG co-occurred with densification of urban land development, indicating potential adverse impacts of compact city on urban greenery. Infill development became dominant, with percentage ranging from 52.7% in Shanghai to 90.6% in Nanjing, resulting in more compact urban form. This study underscores the importance of a multi-scale perspective on understanding the spatial distribution of UG and its change, and its response to urban development.

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“…Therefore, for it is important to track changes in vegetation cover to monitor the impact of these changes. However, few studies have empirically described changes in urban vegetation [27][28][29][30][31], and these existing studies have shown mixed results in different contexts. For instance, in assessing Landsat imagery of more than ten thousand cities, Corbane et al [28] found that urban greenness has increased over the period of 1990 to 2014 for most of the world's urban centres, including 32 mega cities.…”

Section: Introductionmentioning

confidence: 99%

“…Most studies have assessed the overall or net change in greenspace or vegetation cover, which provides a single measure of how much change has happened. While net change is a valuable metric, it is not always easy for related stakeholders to process and implement it in decision making, as it does not provide information about how much of the change is due to gains or losses [30,32,33]. Furthermore, net change can be misleading; for example, large gains and losses in urban vegetation within the landscape in different places may result in no net change overall, despite substantial dynamics within the landscape.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, net change can be misleading; for example, large gains and losses in urban vegetation within the landscape in different places may result in no net change overall, despite substantial dynamics within the landscape. More nuanced metrics, such as the dynamic change approach employed by Wang et al [30], may offer additional information that can be used to develop more sophisticated approaches to policy and practice. The dynamic change approach provides a comprehensive and broad view of change.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Changes in Melbourne’s Urban Vegetation Cover—2001 to 2016

Timalsina

Mavoa

Hahs

2021

Land

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Understanding changes in urban vegetation is essential for ensuring sustainable and healthy cities, mitigating disturbances due to climate change, sustaining urban biodiversity, and supporting human health and wellbeing. This study investigates and describes the distribution and dynamic changes in urban vegetation over a 15-year period in Greater Melbourne, Australia. The study investigates how vegetation cover across Melbourne has changed at five-yearly intervals from 2001 to 2016 using the newly proposed dynamic change approach that extends the net change approach to quantify the amount of vegetation gain as well as loss. We examine this question at two spatial resolutions: (1) at the municipal landscape scale to capture broadscale change regardless of land tenure; and (2) at the scale of designated public open spaces within the municipalities to investigate the extent to which the loss of vegetation has occurred on lands that are intended to provide public access to vegetated areas in the city. Vegetation was quantified at four different times (2001, 2006, 2011, 2016), using the normalized difference vegetation index (NDVI). Dynamic changes of gain and loss in urban vegetation between the three periods were quantified for six local government areas (LGAs) and their associated public open spaces using a change matrix. The results showed an overall net loss of 64.5 square kilometres of urban vegetation from 2001 to 2016 in six LGAs. When extrapolated to the Greater Melbourne Area, this is approximately equivalent to 109 times the size of Central Park in New York City.

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From quantity to quality: enhanced understanding of the changes in urban greenspace

Cited by 23 publications

References 68 publications

Evaluating urban greening scenarios for urban heat mitigation: a spatially-explicit approach

Evaluating urban greening scenarios for urban heat mitigation: a spatially-explicit approach

Spatial distribution of urban greenspace in response to urban development from a multi-scale perspective

Dynamic Changes in Melbourne’s Urban Vegetation Cover—2001 to 2016

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