杉木人工林蒸散规律的研究及乱流扩散法应用的探讨

 本文根据乱流扩散法原理，利用实验集水区连续6年实测数据，对杉木人工林蒸散规律进行了探讨。结果表明：杉木人工林年平均蒸散量875.45mm，占年降雨量的82.2%。其中，林冠蒸散量781.77mm，林地93.68mm，分别为总蒸散量的89.3%和10.7%。与水量平衡法的结果比较，为水量平衡法的101.2%。在研究蒸散规律的同时，对乱流扩散法的应用及参数的估算也进行了较详细的分析。

STUDIES ON THE LAWS OF EVAPOTRANSPIRATION IN A CHINESE FIR PLANTATION AND DISCUSS ON RAIPID CURRENT SPREAD METHOD

On the basis of the data collected from observations in 6 years,acording to the principle of turbulent despersion, the basic characteristics of evapotranspiration in Chinese fir plantation was studied. Results showed that the annual evapotranspiration is 875.45mm,which takes 82.2% of the precipitation. The annual crown-evapotranspiration is 89.3% of the total evapotranspiration (781.77mm), the ground evaporation is 10.7% of total evapotranspiration (93.68mm). The total evapotranspiration increased by 1.2% compared with the results from water balance method. We also analyzed and discussed the application of turbulent flow method and its parameter estime- tion.