Effects of land disturbance on surface temperature in large opencast coal mine
Landsat TM thermal infrared(TlR) bands was used to estimate the spatial dynamics of surface temperature by single-channel method in 1987,1996,2001 ,and 2005 in Pingshuo openeast coal mine area in Shanxi Province,China. The land disturbance types were classified by remote sensed data, which include openeast coal pit, soil removed land, piled land, reclamation land, and industrial centers. An area weighted method was proposed to evaluate the contribution rate of certain disturbance type on temperature increase. Results show that the surface temperature in coal pit and industrial centers are the highest,which are 5 ～ 10 ℃ higher than the lowest temperature in study area;the contributions of coal pit and industrial centers to temperature increase are great;surface temperature heterogeneity is high in piled land for the differences in waste types and piling structures, and the temperature values are at a middle level; piled land contributes to temperature increase evidently in the first stage of mining;temperature of soil removed land and reclamation land are the lowest in each period;temperature increase contribution of reclamation land decrease for the climate controlling effects of vegetation.
openeast coal mineland disturbancesurface temperatureland reclamationPingshuo mining area
NETL
NSTL
万方数据
维普
