Potential contributions of green spaces at business sites to the ecological network in an urban agglomeration: The case of the Ile-de-France region, France

2014 ◽  
Vol 131 ◽  
pp. 27-35 ◽  
Author(s):  
Hortense Serret ◽  
Richard Raymond ◽  
Jean-Christophe Foltête ◽  
Philippe Clergeau ◽  
Laurent Simon ◽  
...  
Keyword(s):  
Urban Agglomeration ◽  
Green Spaces ◽  
Ecological Network

scholarly journals Landscape Pattern and Ecological Network Structure in Urban Green Space Planning: A Case Study of Fuzhou City

Land ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 769
Author(s):  
Bo-Xun Huang ◽  
Shang-Chia Chiou ◽  
Wen-Ying Li
Keyword(s):  
Landscape Pattern ◽  
Green Space ◽  
Urban Green Space ◽  
Green Spaces ◽  
Ecological Network ◽  
Space Planning ◽  
Urban Green ◽  
Urban Green Spaces ◽  
Process Of Urbanization

During the process of urbanization, many green spaces are fragmented for other uses. The key problems for researchers and planners are reducing the fragmentation of green spaces, constructing urban ecological networks, and maintaining sustainable environments to cope with the rapid urbanization process. This paper analyzes Fuzhou, China as a case study of the effects of urbanization, and reviews three epochs in Fuzhou: 2000, 2010, and 2021. First, the integration degree of landscape pattern index and spatial syntactic attribute value is used to quantify the urbanization situation of Fuzhou and the degree of green space fragmentation in the process of urbanization. Second, it adopts the network analysis method to construct an urban ecological network featuring “one city and two rings”. Finally, urban green spaces are assessed by the corridor structure analysis, and the improvement of the urban green space ecological network is quantitatively evaluated by comparing the green space ecological network with the green space planning system. The results show that the urbanization of Fuzhou city center is apparent and the fragmentation of urban green space is a serious issue from 2000 to 2021. The green space planning in Fuzhou is ineffective in improving the existing green space. According to the results, the street integration of space syntax aptly reflects the process of urbanization. In conclusion, the planned ecological network increases the shape complexity of green patches and landscape connectivity and reduces landscape fragmentation, thus improving the urban ecological environment quality and facilitating the sustainability of urban green spaces.

Analysis of spatial dimensions and explicit multifractal modelling for the deployment of green areas in an urban agglomeration.

2021 ◽  
Author(s):  
Leydy Alejandra Castellanos Diaz ◽  
Olivier Bonin ◽  
Pierre Antoine Versini ◽  
Ioulia Tchiguirinskaia
Keyword(s):  
Land Use ◽  
Urban Form ◽  
Urban Areas ◽  
Spatial Scales ◽  
Urban Agglomeration ◽  
Green Spaces ◽  
Land Use Patterns ◽  
Urban Dynamics ◽  
Green Areas ◽  
The Impact

<p>The need to adapt and increase the resilience of urban areas regarding the issues induced by urbanization and climate change effects (e.g. floods, Urban Heat Island, pandemics, etc.), has led to propose several strategies as the Natural-Based Solutions (NBS), which are focus on restoring natural processes such as infiltration and evapotranspiration (ET) in urban areas. In consequence, the increasing interest on NBS installation (highly supported by the H2020 program of the European Commission) by urban planners, decision-makers, researchers and the residing population has conducted to question the most efficient ways of NBS deployment. In this context, the urban dynamics (e.g. population density, land use patterns, transport network, etc.) and the distribution of green areas at different spatial scales play a key role that characterise the urban development in the territory.</p><p>Based on the study of an urban agglomeration named Est-Ensemble, located at the east of Paris (France), this research aims to: i) determinate the fractal dimension of the built-up and green areas by using 2 different box-counting methods; ii) set the potential areas to install NBS, through the development of an iterative downscaling scheme over the built-up structure with the software Fractalopolis, and following a polycentric approach inspired on the urban form of Ile de France Region, and iii) assess the population access to the nearest green spaces and deficit of green spaces.</p><p>Further, from local scale measurements of ET made close to Est-Ensemble agglomeration, the authors carried out a multifractal analysis of the ET data to better evaluate the observed scaling behaviour. This will be coupled with spatial approach developed above to evaluate the impact of temperature reduction of different land use scenarios. This research is partly supported by the French ANR EVNATURB project.</p>

scholarly journals An investigation of green space in a developing country city: The feasibility of creating a network of such spaces

2021 ◽  
Author(s):  
◽  
Hari Iswoyo
Keyword(s):  
Developing Country ◽  
Urban Growth ◽  
Urban Areas ◽  
Green Space ◽  
Developed Countries ◽  
Green Spaces ◽  
Urban Region ◽  
Biodiversity Assessment ◽  
Ecological Network ◽  
Stepping Stones

<p>In developing countries a big issue for urban development is the growth in infrastructure in response to economic and population demands. Such development causes cities to expand and occupy the suburbs, turning them into more built up areas. The impacts of such urban growth are immediately observable in the reduction of green areas and environmental quality, and diminishing contact with the natural environment. This study will focus on green spaces in a city in a developing country to consider the effect of this urbanization. In response to urban growth in developed countries attempts have been made to link together green spaces into a form of networks. These networks are intended to conserve the function of natural areas in towns and cities while still accommodating development. The greenway or green network and ecological network are two successful approaches developed in America and Europe. This study assesses the green spaces in Makassar, an Indonesia city, to see possibility of implementing such concepts. The study begins by redefining spaces into a typology, then assessing the spaces through three stages. The first stage is biodiversity assessment. The Rapid Biodiversity Assessment, adapted from a study in the UK, is used to assess plant biodiversity as an indicator of the quality of green spaces in urban areas. This method was adjusted and simplified to reflect the limitation in resources and time. The second stage was assessment of spaces based on a target species, in this case urban birds. The third stage combines the biodiversity score with consideration of space size and ownership. This stage produced different classes of spaces. These stages produced three different maps which were then overlaid to find the best quality green spaces termed ‘the most preferred spaces’. The next step was to see whether these spaces could be linked up in a network and to determine what sort of network could be achieved. In this part of the analysis spaces are grouped into main patches and scattered small patches, termed stepping stones. With this approach the potential connectivity can be observed visually. This study also acknowledged the significance of areas of ecological quality outside the main city but within the greater urban region and proposed connection of the network of spaces outward towards two natural parks, which could be considered as the main ecological patches. Having assessed the two main elements of a green space network—patches and corridors—through visual observation of the maps generated by the fieldwork, this study concludes that currently an ecological network is not feasible for the city because of the condition of the green spaces that make up the patches and corridors. Even a greenway along the main river corridor is not currently feasible because the highly valuable natural remnants have been significantly fragmented by cultural activities. Similarly, the road corridors are also not currently in a promising condition. The thesis ends with recommendations for the improvement of these.</p>

scholarly journals EFFECTIVENESS OF GREEN ROOFS IN STRENGTHENING ECOLOGICAL NETWORK

2021 ◽  
Vol XLVI-4/W1-2021 ◽  
pp. 51-54
Author(s):  
M. Y. Joshi ◽  
L. Rivière ◽  
G. Mahy ◽  
J. Teller
Keyword(s):  
Detailed Analysis ◽  
Urban Areas ◽  
Smart Cities ◽  
Green Roofs ◽  
Urban Biodiversity ◽  
Green Spaces ◽  
Ecological Network ◽  
Development Framework ◽  
Specific Species ◽  
Foraging Distances

Abstract. Improving biodiversity in urban areas is widely recognised as part of sustainable smart cities development framework. Due to unprecedented urbanisation, there is a lack of adequate green spaces which has in turn affected the urban biodiversity. Green roofs are argued to enhance and support the biodiversity by systematic inclusion into the urban ecological network. However, its connection to the existing natural ecological areas and connectivity are not discussed at a city scale. Thus, in this study, we aim at identifying the connectivity of potential areas for developing green roofs in strengthening the biodiversity and ecological network in cities. Altogether, we observe that the potential roofs are in the near proximity of these zones. The zones with dry lawns and meadows like environment are quite limited and spatially far from each other. Thus, developing green roofs can help in connecting these spaces. In this paper, we mainly focused on bees as they play an important role in pollination and are also declining in the urban areas. Further research can incorporate more detailed analysis on foraging distances of other species. A methodology can be developed to select which zones can be targeted for specific species.

scholarly journals An investigation of green space in a developing country city: The feasibility of creating a network of such spaces

2021 ◽  
Author(s):  
◽  
Hari Iswoyo
Keyword(s):  
Developing Country ◽  
Urban Growth ◽  
Urban Areas ◽  
Green Space ◽  
Developed Countries ◽  
Green Spaces ◽  
Urban Region ◽  
Biodiversity Assessment ◽  
Ecological Network ◽  
Stepping Stones

<p>In developing countries a big issue for urban development is the growth in infrastructure in response to economic and population demands. Such development causes cities to expand and occupy the suburbs, turning them into more built up areas. The impacts of such urban growth are immediately observable in the reduction of green areas and environmental quality, and diminishing contact with the natural environment. This study will focus on green spaces in a city in a developing country to consider the effect of this urbanization. In response to urban growth in developed countries attempts have been made to link together green spaces into a form of networks. These networks are intended to conserve the function of natural areas in towns and cities while still accommodating development. The greenway or green network and ecological network are two successful approaches developed in America and Europe. This study assesses the green spaces in Makassar, an Indonesia city, to see possibility of implementing such concepts. The study begins by redefining spaces into a typology, then assessing the spaces through three stages. The first stage is biodiversity assessment. The Rapid Biodiversity Assessment, adapted from a study in the UK, is used to assess plant biodiversity as an indicator of the quality of green spaces in urban areas. This method was adjusted and simplified to reflect the limitation in resources and time. The second stage was assessment of spaces based on a target species, in this case urban birds. The third stage combines the biodiversity score with consideration of space size and ownership. This stage produced different classes of spaces. These stages produced three different maps which were then overlaid to find the best quality green spaces termed ‘the most preferred spaces’. The next step was to see whether these spaces could be linked up in a network and to determine what sort of network could be achieved. In this part of the analysis spaces are grouped into main patches and scattered small patches, termed stepping stones. With this approach the potential connectivity can be observed visually. This study also acknowledged the significance of areas of ecological quality outside the main city but within the greater urban region and proposed connection of the network of spaces outward towards two natural parks, which could be considered as the main ecological patches. Having assessed the two main elements of a green space network—patches and corridors—through visual observation of the maps generated by the fieldwork, this study concludes that currently an ecological network is not feasible for the city because of the condition of the green spaces that make up the patches and corridors. Even a greenway along the main river corridor is not currently feasible because the highly valuable natural remnants have been significantly fragmented by cultural activities. Similarly, the road corridors are also not currently in a promising condition. The thesis ends with recommendations for the improvement of these.</p>

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