Monitoring and Analysis of Desertification in a Coal Mining Area in Xinjiang Based on Landsat Remote Sensing Data
Xinjiang is a region with severe desertification in China.In recent years,coal mining activities in Xin-jiang have led to land occupation,surface subsidence,and groundwater drainage,directly or indirectly exacerba-ting the trend of desertification in mining areas.Based on Landsat remote sensing data,ENVI5.3 is used for pre-treatment and calculation.This paper extracted the Normalized Difference Vegetation Index(NDVI),estimated Fractional Vegetation Cover(FVC),calculated vegetation regional change data,and monitored the desertification of mining areas and their potential affected areas in the past 10 years.The conclusion was as follows:(l)The con-clusions drawn from the three monitoring methods were basically consistent.In the past 10 years,the average veg-etation FVC in the study area has decreased by 4.04％,and the proportion of areas with FVC＞0.3 has decreased by 4.59％.The overall vegetation coverage has decreased,with a trend of desertification spreading.Since August 2020,human activities such as mining have begun to decrease,which has also led to an increase in the average FVC and vegetation coverage area in the study area from 2020 to 2023.The process of desertification has slowed down.(2)The data and images of vegetation regional changes calculated and inverted based on NDVI and FVC inversion could accurately and intuitively reflect areas with reduced vegetation and desertification development trends.This provided a visual monitoring method for desertification monitoring in mining areas and a reference basis for monitoring and preventing desertification in mining areas.
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万方数据
