Spatial-temporal pattern of NDVI and its driving factors in the mining district of Southeast Hubei from 2000 to 2022
The mining district of Southeast Hubei is one of the most important polymetallic ore-forming areas in the middle reaches of the Yangtze River.Studying the dynamic change characteristics of NDVI(Normalized Difference Vegetation Index)in this area can help to systematically evaluate the vegetation recovery status and is of great significance for subsequent natural resource development,utilization,and ecological environmental protection.Based on Landsat images from 2000 to 2022,this study constructed long-term NDVI data sequences and used Theil-Sen Median trend analysis,Mann-Kendall test,spatial autocorrelation analysis,and geoprobe tools to explore the spatiotemporal changes and driving factors of NDVI in the mining district of Southeast Hubei over the past 23 years.The results show that the NDVI in the mining district of Southeast Hubei is generally at a high level and shows a trend of fluctuating increase.The NDVI increase area accounts for about 70.81%,mainly distributed in areas such as Echeng District,Daye City,Yangxin County,etc.Spatially,NDVI shows significant positive correlation,mainly clustering into high/high clusters and low/low clusters,but with the recovery of vegetation,the degree of aggregation gradually weakens.Socio-economic,topographical and geological environmental factors are closely related to the spatial distribution of NDVI.Specific performance is the interaction between land use,engineering geological rock groups,soil types,slope orientation,and slope angle has a significant impact on the spatial distribution of NDVI.The research results can reflect the vegetation change characteristics of the mining area and have certain guiding significance for regional ecological protection and restoration.
NDVIspatial-temporal patterndriving factorgeographic detectormining district of Southeast Hubei
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