Study on spatiotemporal changes of fractional vegetation cover in Baotou City based on NDVI in the past 20 years
[Objective]This paper aimed to evaluate the effectiveness of ecological restoration and governance in-Baotou City over the past 20 years,from 2000 to 2021.[Method]The study analyzed Fractional Vegetation Cover (FVC) and its spatiotemporal dynamic changes using the Normalized Differential Vegetation Index (NDVI) and-dimidiate pixel model,based on the LandSat TM/OLI image data from five periods of peak vegetation growth be-tween 2000 to 2021. Additionally OHS image data from"Zhuhai-1" satellite for the Tumet Right Banner in 2021 were used for accuracy evaluation.[Result]Accuracy evaluation showed that Land Sat-8 data and OHS data from the same period in 2021 exhibited high similarity in the spatial distribution and coverage area at different FVC levels in the Tumote Right Banner area,with a similarity of 86.96％. This suggests that the FVC inversion using LandSat data was accurate and feasible. From 2000 to 2021,the FVC types in Baotou City were predominantly low and me-dium,accounting for over 65％ of the total FVC. The average change in FVC during this period was 0.0528. FVC changed over different periods exhibited an initial decrease followed by an increase,indicating a general trend of slight degradation followed by slight improvement in vegetation coverage.[Conclusion]During the period from 2000 to 2021,Baotou City's vegetation coverage initially decreased and then increased,reflecting a period of ecological degra-dation followed by improvement. This research highlights the significant implications for ecological environmental re-mediation in Baotou City.
fractional vegetation covernormalized differential vegetation indexdimidiate pixel model
万方数据
维普
