The research results show that the transpiration instensity of populus hopeiensis was 0.0896±0.0586g/gf'h. The correlation between daily changes in the transpiration intensity and the air temperature was quite significant, but the correlation between the seasonal changes of the former and the latter, and the correlation between the seasonal changes of the former and the relative humidity or the soil water were not significant. The water consumption of the community evapotranspiration was equal to the precip...