Evapotranspiration over a Japanese cypress forest. II. Comparison of the eddy covariance and water budget methods
Evapotranspiration over a Japanese cypress forest. II. Comparison of the eddy covariance and water budget methods
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DOI：
10.1016/j.jhydrol.2006.05.025
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发表时间：
2007-02
影响因子：
6.4
通讯作者：
Y. Kosugi;M. Katsuyama
中科院分区：
文献类型：
--
作者：
Y. Kosugi;M. Katsuyama
使用涡流协方差和水预算方法估算了日本柏树林的蒸散量。长期水分收支显示，尽管有树木生长、演替、偶尔砍伐和自然干扰，该流域的年蒸散量33年没有发生明显变化。对能量收支进行校正的涡度协方差法与长期和短期水分收支法的比较强烈表明了两种方法结果的有效性，并且还表明，尽管降水量和土壤湿度存在相当大的波动，但蒸散量季节波动的幅度和特征并未显示出显着的年际差异。经能量收支修正后的涡度协方差法的三年平均蒸散量（735mm）与水收支法的33年平均蒸散量（749mm）非常接近。
Evapotranspiration over a Japanese cypress forest was estimated using both the eddy covariance and water budget methods. The long-term water budget revealed that there has been no obvious change in the annual amount of evapotranspiration in this watershed for 33 years despite tree growth, succession, occasional cutting and natural disturbance. Comparison of the eddy covariance method, with a correction for the energy budget, and long-term and short-term water budget methods strongly suggests the validity of the results of both methods and also demonstrates that both the amplitude and characteristics of the seasonal fluctuation of evapotranspiration show no significant interannual differences despite considerable fluctuation in precipitation and hence soil moisture. The three-year average amount of evapotranspiration from the eddy covariance method, with a correction for the energy budget (735mm) were very close to the 33-year average amount of evapotranspiration from the water budget method (749mm).