ANALYSIS OF VEGETATION COVERAGE CHANGES IN GONGHE COUNTY,QING HAI LAKE REGION FROM 2013 TO 2020 BASED ON LANDSAT 8 OLI DATA
Based on the Landsat 8 OLI satellite remote sensing image data in the United States,ArcGIS 10.8 and ENVI5.3 software were used to extract and analyze the dynamic change characteristics of vegetation coverage in different periods of Gonghe County by using the pixel bipartite model method and the difference image method.The results showed that the average vegetation coverage in 2013,2015,2017 and 2020 was 58％,50％,46％and 54％,respectively,and the proportion of the area with vegetation coverage fc＞0.4 to the total area reached more than 60％.In the past 8 years,the vegetation coverage had showed a fluctuating trend,and the area of vegetation coverage at all levels had changed nearly 5 806.64 km2,and the vegetation coverage had experienced a small range of improvement,degradation and improvement stages.The decline region area ration of vegetation coverage was higher than the increase region area ration.these results showed it was useful to strength the ecological environment protection.
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万方数据
