Quantitative Relationship between Urban Green Canopy Area and Urban Greening Land Area
Publication: Journal of Urban Planning and Development
Volume 147, Issue 2
Abstract
The urban green space ratio (GSR) is the ratio of the urban greening land area to the built-up area and is an indicator for controlling land use for greening in urban development in China. However, the statistical process for the urban GSR by field manual survey or remote sensing imagery visual interpretation is a time-consuming and labor-intensive task. While estimating the urban green canopy ratio (GCR) by spatial information technology has been wildly accepted in the industry. This research investigates the influencing factors between the urban greening land area and the urban green canopy area for exploring the quantitative relationship between GSR and GCR. The results showed that the urban street tree greenbelt is a positive correlation factor, while pavement and water bodies in an urban park are the negative correlation factors. Then, a calculation model of the urban GSR was proposed that will reduce the workload of green space statistics and achieve a high efficiency and accuracy for urban GSR surveys. This model would be applicable in the spatial mapping fields and the spatial planning fields.
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Acknowledgments
This research was funded by the National Natural Science Foundation of China (Grant No. 51808320).
Notation
The following symbols are used in this paper:
- Lst
- length of street tree greenbelt;
- Rgs
- ratio of green space;
- Sgc
- area of urban green coverage;
- Spl
- area of park dry land;
- Spp
- area of park pavement;
- Spw
- area of park water body;
- Sstc
- green coverage area of street tree greenbelt;
- Sub
- area of urban built-up;
- Wst
- wide of street tree greenbelt;
- X
- ratio of the pavement to the park & ratio of the water body area to the park dry land; and
- Y
- two-ratio difference caused by the pavement or the water body.
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Published In
Journal of Urban Planning and Development
Volume 147 • Issue 2 • June 2021
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© 2021 American Society of Civil Engineers.
History
Received: Mar 15, 2020
Accepted: Dec 22, 2020
Published online: Mar 18, 2021
Published in print: Jun 1, 2021
Discussion open until: Aug 18, 2021
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