Ecological Benefit Analysis of Urban Green Space Based on Three-Dimensional Green Quantity

• Published in: Journal of the Indian Society of Remote Sensing 2022, Vol.50 (11), p.2267-2276
• Main Authors: Li, Feng-xia, Li, Meng, Feng, Xiao-gang
• Format: Article
• Language: English
• Subjects: Absorption; Carbon dioxide; Dust; Earth and Environmental Science; Earth Sciences; Open spaces; Remote sensing; Remote Sensing/Photogrammetry; Research Article; Retention; Sulfur dioxide; Urban areas; Urban planning
• ISSN: 0255-660X; 0974-3006
• DOI: 10.1007/s12524-022-01603-x

Using large-scale field data and remote sensing imagery, we estimated the three-dimensional (3-D) green quantity of green space and analyzed the ecological benefits of urban green spaces in Xi’an City, China. The total 3-D green quantity of the main Xi’an urban area was 37475294.7 m 3 , annual CO 2 absorption was 113.9 × 10 3 t, annual SO 2 absorption was 113.6 t, annual dust retention was 41.2 × 10 3 t, and annual O 2 production was 82.6 × 10 3 t; of which, CO 2 absorption had the greatest benefit. The total ecological value of the arbor forest was 176.839 million yuan, to which the annual CO 2 absorption, SO 2 absorption, dust retention, and O 2 production contributed 77.28%, 0.08%, 3.96%, and 18.68% of the value, respectively. Among them, CO 2 absorption accounted for the largest proportion of the monetary value, which was equivalent to 136.656 million yuan. Future research should focus on developing an accurate evaluation index model for assessing the ecological benefits of urban green space based on the characteristics of green quantity and providing an important basis for the rational planning of urban green space and scientific allocation of garden plants.