| Citation: |
YIN Zong-Min, YIN Zong-Qi, LIU Xue-Hao, HE Wen-Xi. 2024. Analysis of the Temporal and Spatial Variations of NDVI in Wuhan from 2000 to 2022. South China Geology, 40(4): 794-803. doi: 10.3969/j.issn.2097-0013.2024.04.017
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Analysis of the Temporal and Spatial Variations of NDVI in Wuhan from 2000 to 2022
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Abstract
NDVI (Normalized Difference Vegetation Index) can effectively reflect vegetation coverage, and can be used to study its spatial and temporal distribution and driving factors, which is of great significance for the construction of ecological civilization. This paper utilizes NDVI data calculated from MODIS images of Wuhan City from 2000 to 2022 to conduct spatial-temporal and correlation analysis. The results show that: 1) The overall NDVI in Wuhan City shows a growing trend, with relatively lower values in the central urban area and better vegetation coverage in the northern and southern parts of the city. 2) The NDVI in Wuhan City remained stable from 2000 to 2005, and increased from 2005 to 2022, with the monthly mean NDVI showing a negative skew, an increasing trend from January to August, and a decreasing trend from August to December. 3) There were significant increases in NDVI in Wuhan City during 2004—2005 and 2017—2018, and a significant decrease during 2007—2008. Compared to 2000, there was a noticeable increase in 2022.4) The time series prediction results indicate that the NDVI in Wuhan City will show a growing trend from 2021 to 2025, with the increase in NDVI from April to October contributing significantly to the annual NDVI growth. 5) There is a moderate positive correlation between NDVI and annual precipitation, and a strong positive correlation between NDVI and the city's greening fund investment which is an important reason for the increase in NDVI in Wuhan City.
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Keywords:
- Wuhan City /
- NDVI /
- spatiotemporal analysis /
- Time Series Forecasting Model /
- correlation analysis
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References
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YIN Zong-Min, YIN Zong-Qi, LIU Xue-Hao, HE Wen-Xi. 2024. Analysis of the Temporal and Spatial Variations of NDVI in Wuhan from 2000 to 2022. South China Geology, 40(4): 794-803. doi: 10.3969/j.issn.2097-0013.2024.04.017
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Figure 1.
Location map of Wuhan City
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Figure 2.
NDVI distribution map of Wuhan City from 2000 to 2022
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Figure 3.
Annual NDVI statistical curve (a) and monthly statistical curve (b) for Wuhan City
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Figure 4.
NDVI change map of Wuhan City from 2000 to 2022
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Figure 5.
NDVI accumulative change map of Wuhan City from 2000 to 2022
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Figure 6.
Comparison of model predicted NDVI curve and measured NDVI curve for Wuhan City from 2021 to 2025
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Figure 7.
NDVI trend values (a) and seasonal monthly NDVI averages predicted by the Prophet model (b)for Wuhan City from 2021 to 2026
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Figure 8.
Comparison analysis of NDVI values in Wuhan City from 2000 to 2022 with annual average precipitation (a), annual average temperature (b), annual average sunshine hours (c), and annual green space investment funds (d)