Abstract: Based on the MOD11C3 data of land surface temperature (LST) in 2003-2009, and by using GIS technology, this paper analyzed the spatial distribution pattern of the LST in the Three Gorges Reservoir Region (Chongqing section) before and after the construction of the Dam. Meanwhile, the mean annual air temperature data from four weather stations and related LST were compared to identify the change pattern of the LST. As affected by altitude, latitude, and vegetation cover, the LST in the Three Gorges Reservoir Region (Chongqing section) was generally higher in southwest area and lower in northeast area. Due to the thermal effect of water, there were two high temperature regions and two low temperature regions. The high temperature regions were mainly in the southwest part, whereas the low temperature regions were mainly in the southeast part. The mean LST increased from 18.2℃ before the construction of the Dam to 18.6 ℃ after the construction of the Dam, but the increment was not significant. There was an obvious seasonal variation of the LST in the Three Gorges Reservoir Region (Chongqing section) after the construction of the Dam. The LST increased in spring, autumn, and winter, but decreased in summer. The change pattern of the LST had good correlation with that of the air temperature.

Key words: landfill cover soil, trichloroethylene, bacterial community structure., Illumina MiSeq sequencing