Calculation of soil evapotranspiration with zero flux plane method
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DOI：10.7606/j.issn.1000-7601.2006.02.26
Key Words: zero flux plane  soil water  evapotranspiration
Author NameAffiliation
HU An-yan College of Environmental Engineering and Sciences，Chang’an University，X i’an 710054， China 
DONG Xin-guang College of Hydraulic and Hydroelectric Engineering，Xinjiang Agricultural University，Urumqi 830052，China 
LIU Yan College of Environmental Engineering and Sciences，Chang’an University，X i’an 710054， China 
ZHOU Jin-long College of Hydraulic and Hydroelectric Engineering，Xinjiang Agricultural University，Urumqi 830052，China 
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Abstract:
      The calculation of soil evapotranspiration is a difficulty in studying soil water movement.Zero flux plane method is a method of calculating soil evapotranspiration by zero flux plane during certain period.According to the development condition of zero flux plane,it can be divided into steady condition equation and variation condition equation.These equations are tested by soil profile with different depth of water line and different crops.The results indicate that the zero flux plane method is feasible and its accuracy is favorable.This method is suitable for calculating soil evapotranspiration in arid and semi-arid plain areas where the depth of water line is between 3 m to10 m.
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