关键词: 植被指数, 煤矿开采, 植被覆盖度, Landsat TM遥感数据

Abstract:

Coal mining destroys eco\|environment, affecting the sustainable development in the mining area. This paper, aiming at the impacts of coal mining on vegetation coverage, uses Jincheng's Landsat TM remoting sensing data from 1987 to 2011 and coal mines distribution maps, and applies Flaash in ENVI 5.1 to gain the radiation brightness value from determining radiation, atmosphere calibration, and gain the average vegetation index of DVI, NDVI, PVI from jointing, trimming and wave band operatio. The data of DVI, NDVI and PVI are compared to obtain the changing trend of vegetation coverage in mining and non\|mining areas, where SPSS software is used to study their vegetation coverage variance. Value P of DVI and NDVI in mining and non\|mining areas is 0.048, 0.036, both less than 0.05, indicating vegetation coverage in mining area is obviously less than in non\|mining area, and DVI and NDVI in mining area are less than in non\|mining by 199.103 and 0.070. DVI and NDVI in mining area turned sharply in 2009 with an annual rising rate of vegetation coverage 24%, suggesting the policy of coal consolidation and acquisition improve the ecological environment to some extent.

Key words: vegetation index；coal mining, vegetation coverage；Landsat TM remote sensing data