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[1]ZHANG Bin,XIA Qiuyue.Topographic Gradient Effect and Vulnerability Analysis of Carbon Storage in Wuhan Urban Circle[J].Research of Soil and Water Conservation,2023,30(05):443-452.[doi:10.13869/j.cnki.rswc.2023.05.002.]

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Topographic Gradient Effect and Vulnerability Analysis of Carbon Storage in Wuhan Urban Circle

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 05 Page number: 443-452 Column: Public date: 2023-08-10

Title:: Topographic Gradient Effect and Vulnerability Analysis of Carbon Storage in Wuhan Urban Circle

Author(s):: ZHANG Bin¹, XIA Qiuyue²; (1.School of Public Administration, Huazhong University of Science and Technology, Wuhan 430074, China; 2.School of Public Administration, Huazhong Agricultural University, Wuhan 430070, China)

Keywords:: Wuhan urban circle; carbon storage; terrain gradient; land use change; vulnerability

CLC:: X171.1

DOI:: 10.13869/j.cnki.rswc.2023.05.002.

Abstract:: [Objective] Accurately assessing the spatial and temporal differentiation of regional carbon storage, and analyzing its topographic gradient effect and vulnerability to land use, are of great significance for the implementation of the regional ‘two carbon' goal. [Methods] Wuhan urban circle was taken as an example. The InVEST model was used to evaluate the spatial and temporal differentiation characteristics of regional carbon storage with the help of GIS platform, and based on DEM data, the terrain index was used to explore the topographic gradient effect of carbon storage, and the potential impact index was used to reveal the vulnerability of carbon storage. [Results](1)From 2005 to 2020, the total carbon storage in Wuhan urban circle first decreased and then increased, showing a trend of low in the middle and west and high in the north and south in terms of spatial distribution, with large differences between cities.(2)The topographic position of Wuhan urban circle is generally low in the central and western regions and high in the north and south, with the largest proportion of level 1. From the spatial autocorrelation analysis, it can be seen that there is a significant positive spatial correlation between regional topographical position and carbon density.(3)The conversion of cultivated land to construction land is the main reason for the loss of regional carbon storage, resulting in a carbon loss of up to 7.068 Tg, while the conversion of cultivated land to forest land is the main reason for the increase of regional carbon storage, expanding the regional carbon pool by 7.62 Tg. As far as the vulnerability assessment of carbon storage was concerned, from the perspective of the urban circle as a whole, the PI indices from 2005 to 2020 were all negative, indicating that regional land use could have a negative potential impact on carbon storage. [Conclusion] The carbon storage in Wuhan urban circle has generally decreased and there are significant differences among internal cities. The topographic position is significantly positively correlated with carbon density, and the vulnerability of carbon storage is high due to land use change.

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Last Update: 2023-08-10