Evaluation and generalization of temperature‐based methods for calculating evaporation
Evaluation and generalization of temperature‐based methods for calculating evaporation
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DOI：
10.1002/hyp.119
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发表时间：
2001-02
影响因子：
3.2
通讯作者：
Chong-Yu Xu;Vijay P. Singh
中科院分区：
文献类型：
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作者：
Chong-Yu Xu;Vijay P. Singh
在加拿大安大略西北部的两个气候站（罗森湖和阿蒂科坎），评估和比较了七个基于温度的方程，每个方程代表一种典型的形式，用于确定蒸发。首先使用每个方程中涉及的原始常数值进行比较，然后使用重新校准的常数值进行比较。结果表明，当使用原始常数值时，两个台站的大多数方程都存在较大的偏差。当用重新校准的常数值代替原来的常数值时，两个台站的七个方程中有六个得到了改进。使用当地校准的参数值，所有七个方程都能很好地确定平均季节蒸发值。对于每月蒸发值，修改后的Blaney-Criddle方法产生的误差最小的所有月份的两个站，其次是哈格里夫斯和Thornthwaite方法。Linacre，Kharrufa和Hamon的方法显示出显着的偏见，在9月的两个站。在适当确定常数值的情况下，就基于温度的方法而言，可以推荐使用改进的Blaney-Criddle、Hargreaves和Thornthwaite方法来估算研究区域的蒸发。版权所有© 2001约翰威利父子有限公司。
Seven temperature‐based equations, each representing a typical form, were evaluated and compared for determining evaporation at two climatological stations (Rawson Lake and Atikokan) in north‐western Ontario, Canada. The comparison was first made using the original constant values involved in each equation, and then using the recalibrated constant values. The results show that when the original constant values were used, larger biases existed for most of the equations for both stations. When recalibrated constant values were substituted for the original constant values, six of the seven equations improved for both stations. Using locally calibrated parameter values, all seven equations worked well for determining mean seasonal evaporation values. For monthly evaporation values, the modified Blaney–Criddle method produced least error for all months for both stations, followed by the Hargreaves and Thornthwaite methods. The Linacre, Kharrufa and Hamon methods showed a significant bias in September for both stations. With properly determined constant values, the modified Blaney–Criddle, the Hargreaves and Thornthwaite methods can be recommended for estimating evaporation in the study region, as far as temperature‐based methods are concerned. Copyright © 2001 John Wiley & Sons, Ltd.