Based on the GEE(google earth engine)platform combined with the pixel bipartite model,the vegetation coverage was estimated,and the geoscience information map system was constructed.The system was used to analyze the temporal and spatial variation characteristics of vegetation coverage in the lower reaches of the Tarim River.The following conclusions were drawn:the vegetation cover structure in the lower reaches of the Tarim River was dominated by extremely low vegetation cover,accounting for more than 80％of the total area of the study area;the most obvious change in the vegetation cover pattern was the transition between very low vegetation cover and other vegetation cover types,followed by the transformation between low vegetation cover and other vegetation cover types;the largest increases in the vegetation cover fluctuation spectrum were low vegetation cover and medium vegetation cover,and the largest decline was very low vegetation cover;the pattern of vegetation cover change was mainly stable and invariant,and the proportion of late change type was greater than that of previous change type.On the whole,from 2000 to 2022,the ecological environment of the lower reaches of the Tarim River gradually improved,and the vegetation change became better and better.
关键词
植被覆盖度/地学信息图谱/时空变化/塔里木河下游/遥感
Key words
vegetation coverage/geoscience information map/spatial-temporal variation/lower reaches of Tarim River/remote sensing
维普
万方数据