[1]Li Yongping,Zhao Xiaoyan,Tan Shucheng,et al.Spatial and Temporal Evolution of Vegetation Cover and Driving Forces in the Urban Agglomeration of South Sichuan Province[J].Research of Soil and Water Conservation,2024,31(05):399-409.[doi:10.13869/j.cnki.rswc.2024.05.005]
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
31
Number of periods:
2024 05
Page number:
399-409
Column:
Public date:
2024-08-10
- Title:
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Spatial and Temporal Evolution of Vegetation Cover and Driving Forces in the Urban Agglomeration of South Sichuan Province
- Author(s):
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Li Yongping1, Zhao Xiaoyan2,3, Tan Shucheng4, Wu Han3
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(1.Office of International Exchange and Cooperation, Neijiang University, Neijiang, Sichuan 641000, China; 2.Institute of International Rivers and Ecological Security, Yunnan University, Kunming 650500, China; 3.School of Geography and Resource Science, Neijiang University, Neijiang, Sichuan 641000, China; 4.School of Earth Science, Yunnan University, Kunming 650500, China)
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- Keywords:
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vegetation cover; drivers; geographical detector model; south Sichuan urban agglomeration
- CLC:
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Q948
- DOI:
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10.13869/j.cnki.rswc.2024.05.005
- Abstract:
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[Objective]The aims of this study are to explore the spatial and temporal evolution patterns of vegetation cover in the urban agglomeration of southern Sichuan, to analyze its driving mechanism, and to provide reference and decision-making basis for promoting ecological environmental protection and sustainable socioeconomic development in the upper reaches of the Yangtze River. [Methods]The vegetation cover was taken as the research object. The coefficient of variation and linear regression research methods were used to analyze the spatial and temporal evolution characteristics of the vegetation change in the urban agglomeration of south Sichuan from 2001 to 2021, and the geographic detector model was used to explore the influencing factors. [Results](1)The overall condition of vegetation cover in the south Sichuan urban agglomeration was good, and the proportion of areas with vegetation cover of 0.4 or more was 71.74%. The change of vegetation cover was dominated by low fluctuation, accounting for 78.16%. The trend of vegetation degradation was significant, accounting for 8.89%.(2)The degree of influence of each driving factor on vegetation cover was ranked in descending order:elevation>land use type>average annual temperature>slope>population density>GDP>urbanization rate>average annual evaporation>average annual precipitation>aspect. Among them, the explanatory power q-values of the first six factors were all greater than 16%, which were the main driving factors affecting the change of vegetation cover.(3)Any two-factor interactions were dominated by two-factor enhancement and nonlinear enhancement, in which the q value of the interaction between elevation and land use type was the largest, 0.369.(4)When the elevation was 1 200 to 1 400 m, the mean annual temperature was 12.15 to 15.16 ℃, the slopes were 32° to 35°, the population density was less than 22.31 people/km2, the GDP was 122 to 1 221 yuan/km2 and when the land use type was woodland, the vegetation was most suitable. [Conclusion]The overall condition of vegetation cover in the south Sichuan urban agglomeration from 2001 to 2021 was good, and topography, meteorological conditions and socioeconomic factors all had a significant impact on regional vegetation changes.