干旱区生态环境知识资源中心

Land surface temperature is an important parameter to characterize the earth's surface environment. And it plays very important role in the course of global natural ecosystem evolution. As a result of the surface energy balance, the land surface temperature will influence directly evaporation from topsoil and vegetation transpiration. So, the land surface temperature was retrieved and analyzed using the mono-window algorithm of Qinzhihao and the data of Landsat TM in the study of the spatial distribution of ecological water requirement in the groundwater-fluctuating belt of the lower reaches of Heihe River. The conclusions show that the spatial distribution of the land surface temperature was matching and coupling with the status of land cover. The retrieved result of land surface temperature characterize exactly the relationship between water and temperature of the earth surface in the arid region, which provide an important data source for the study of regional evapotranspiration, ecological water requirement of vegetation and the effort of restoring vegetation and rebuilding ecosystem.