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Analysis to vegetation coverage change in Shendong mining area with SPOT NDVI data

WU Li-xin1,2,3,MA Bao-dong1,LIU Shan-jun1(1.Institute for Geo-informatics & Digital Mine Research,Northeastern University,Shenyang 110004,China;2.Key Laboratory of Environment Change & Natural Disaster of Ministry of Education,Beijing Normal University,Beijing 100875,China;3.Academy of Disaster Reduction & Emergency Management of Ministry of Civil Affairs/Ministry of Education,Beijing Normal University,Beijing 100875,China)  
Using NDVI data from SPOT-4/5 satellite,and applying the gradation-change detection method for land desertification and the unary linear regression method,the dynamic change,in 1999—2008,of the vegetation coverage and land desertification in Shendong coal mining area in Northwest China was analyzed.It is revealed that the NDVI in Shendong increases integrally,and the land vegetation coverage in most of the mining area is improved.The ratio of obviously improved area reaches to 82.13%,while the ratio of degraded area is no more than 1%.The situation of land desertification is improved a lot in that the ratio of serious desertification area is decreased from 88.33% to 23.56%.It shows that the SPOT NDVI data can be used for the monitoring and analysis on vegetation coverage and land desertification in lager coal mining areas in Northwest China.
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