[1]Zhang Yue,Sun Mengxin,Xin Yu,et al.Trend and Influencing Factors of Vegetation NDVI in Eastern Sichuan from 2000 to 2020[J].Research of Soil and Water Conservation,2023,30(06):247-254,263.[doi:10.13869/j.cnki.rswc.2023.06.012]
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 06
Page number:
247-254,263
Column:
Public date:
2023-10-10
- Title:
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Trend and Influencing Factors of Vegetation NDVI in Eastern Sichuan from 2000 to 2020
- Author(s):
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Zhang Yue1,2, Sun Mengxin1,2, Xin Yu1,2, Yang Cunjian1,2
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(1.Key Laboratory of Evaluation and Monitoring of Southwest Land Resources, Ministry of Education, Sichuan Normal University, Chengdu 610068, China; 2.College of Geography and Resource Science, Sichuan Normal University, Chengdu 610068, China)
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- Keywords:
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NDVI; eastern Sichuan; residual analysis; climate change; human activities
- CLC:
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Q948.112
- DOI:
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10.13869/j.cnki.rswc.2023.06.012
- Abstract:
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[Objective] The aim of this study is to explore the characteristics of spatial distribution and spatiotemporal changes of vegetation in the eastern Sichuan region, to reveal the main factors affecting the changes of vegetation and the specific scope, and thus to provide scientific and technological support for the construction of ecological civilization and high-quality development in this region. [Methods] Based on MODIS-NDVI data and ground meteorological station data, the relationship between the trend of vegetation cover change and the influencing factors in eastern Sichuan was explored using trend analysis, partial correlation coefficient and residual analysis. [Results](1)From 2000 to 2020, the NDVI of the vegetation in the eastern part of Sichuan Province showed the distribution pattern of high level in the northeast and low level in the southwest, and the overall vegetation cover showed the upward trend, with obvious stage characteristics. Over the past 21 years, the vegetation cover in most areas of the eastern Sichuan region had significantly improved, and localized vegetation degradation had been serious.(2)Both climate change and human activities contributed to vegetation NDVI, with differences in the areas of influence on vegetation and more significant effects of human activities on vegetation.(3)From 2000 to 2020, vegetation NDVI in eastern Sichuan was positively correlated with temperature and precipitation, and the effect of temperature factor was more significant, but the area of the region passing the 0.05 significance test was smaller, indicating that vegetation changes were mainly influenced by non-climatic factors.(4)The impact of human activities on vegetation had two aspects, on the one hand, urbanization led to the decline of vegetation NDVI, on the other hand, through the implementation of forestry ecological projects, forest and grassland vegetation recovery was obvious. [Conclusion] The vegetation cover of the east Sichuan area had been effectively restored as a whole, and its changes were mainly influenced by human activity factors. The study of the influencing factors can help provide theoretical support for ecological environmental protection and sustainable development.