摘要
以1979年以来多期陆地卫星Landsat MSS/TM遥感数据为基础,利用煤矿遥感影像各波段反射率远低于其他地物的典型光谱特征,提取了乌海市煤矿开采区时空分布数据集,并结合SPOT-VEGETATION NDVI数据,对乌海市煤矿开采区的变化过程以及生态环境影响进行了动态监测。结果表明:30a来乌海市煤矿开采区扩张明显,煤矿开采区面积由1979年的2.69km2增加到2010年的109.34km2,净增加106.65km2。煤矿开采过程中侵占了大量耕地、林地和草地,导致1998～2001年乌海市整体生态环境急剧恶化,全市年最大NDVI由1998年的0.2043下降到2001年的0.1231,2000年以后,乌海市煤矿开采区面积虽然仍呈增长趋势,但全市植被覆盖状况有所好转,尤其是2005～2010年植被覆盖状况明显好转,全市年最大NDVI由2005年的0.1417上升到2010年的0.2028。
The temporal and spatial distribution dataset of the coal mining area in Wuhai were extracted by multi-phase Landsat MSS / TM remote sensing data since 1979 and the characteristics of spectral features of coal mining areas, which the reflectance of the each band coal mine in the remote sensing would be far lower than that of other surface features. Meanwhile, the dynamic changes in coal mining areas and its in- fluence on ecological environment in Wuhai were monitored based on SPOT-Vegetation NDVI time series dataset. The results indicated that the coal mining area in Wuhai increased from 2.69 km2 to 109.34 km2 during the last 30 years, and large area of cultivated land,woodland and grassland were encroached with the dilation of coal mining and led to a rapid deterioration of the ecological environment in Wuhai. The NDVI
出处
《遥感技术与应用》
CSCD
北大核心
2012年第6期933-940,共8页
Remote Sensing Technology and Application
基金
高分辨率对地观测重大专项(E0203/1112/JC03)
国家973计划项目(2010CB950901)
