摘要
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。
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.
关键词
蒸发散
乱流交换
动力参数
杉木
Evapotranstiration
Turbulent flow exchange
Driving force parameter
Water balance
