Abstract: The aim of this research is to analyze the evolution of vegetation cover in the Huainan mining area during the period of 2005-2014 and provide scientific references for the ecological restoration of the mining area.Based on the dimidiate pixel model and the MODIS NDVI time series products obtained every 16 days,the vegetation coverage of 2005,2008,2011 and 2014 in Huainan mining area was extracted.The temporal and spatial evolution characteristics of vegetation cover were analyzed from three aspects:temporal evolution,quantity transfer and spatial evolution.The results show that the average NDVI in the monitoring period decreased from 2005 to 2008 and increased from 2008 to 2015.The average vegetation coverage in the monitoring period was 0.722 3,0.701 7,0.718 1 and 0.702 8,respectively,with the average decrease rate of 2.7%.The area covered by the higher vegetation was the dominant vegetation cover in the study area,accounting for 50% of the total area of the study area,while the medium,low and no vegetation cover area was stable in the monitoring time,with their areas less than 200 km²,indicating the vegetation cover was generally in good condition.The transformation of vegetation cover was mainly dominated by the transformation between the relatively high coverage and high coverage.The stability condition was the main evolution direction of vegetation cover,while the alternation between mild degradation and mild improvement of vegetation were obvious.

Key words: Huainan mining area, vegetation coverage, spatiotemporal revolution, remote sensing monitoring, MODIS NDVI