摘要
本文采用波文比法;能量平衡法;空气动力学法和蒙蒂斯综合法计算了农田水分散失。并进行了比较。波文比在-0.4<β<0.4范围内,结果清楚地表明:(1)空气动力学方法的计算结果比波文比方法所得结果有偏小趋势(空气动力学方法计算中假设Kh/Kw=1);(2)能量平衡方法的计算结果与波文法的计算结果吻合的相当好,并且能量平衡方法的最大优点是不用观测湿度梯度,(3)蒙蒂斯综合法的计算结果与波文比法的结果也比较一致。文中就各种方法的误差也做了分析。
The Bowen ratio method, the aerodynamic method, the energy balance method and the Monteith Combir.ation method have been widely used for measuring evaporation in the farm field. In this paper, the author has used over the four methods and calculated evaporation in the farm field and compared the results with that from the Bowen ratio method. Within rang-0. 4<β<0.4, the result shows clearly that: (1) the aerodynamic method gives results only a less than the Bowen ratio method; (2) the energy balance method gives results is almost as good as the results of the Bowen ratio method and has the advantage of not requiring humidity measurements; (3) the Monteith combination method is a new method about evaporation calculation in the farm field, comparing the results with that from the Bowen ratio method is closely. In this paper, about discusses of the errors from each method also is given.
出处
《北京大学学报（自然科学版）》
CAS
CSCD
北大核心
1989年第5期594-604,共11页
Acta Scientiarum Naturalium Universitatis Pekinensis
关键词
农田
水分
蒸散
波文比法
The Bowen ratio raethod
The aerodynamic method
The energy balance method
The monteith combination method
Evapotranspiration
Evaporization
Sensible heat flux
Latent heatflux
