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Wind-adjusted Turc equation for estimating reference evapotranspiration at humid European locations

机译：风量调节的Turc方程用于估算欧洲潮湿地区的参考蒸散量

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摘要

The Turc equation is one of the simplest empirical equations used for estimating reference evapotranspiration (ET_O) under humid conditions. However, this equation generally overestimates ET_O values at windless humid locations and underestimates ET_O at windy humid locations. The main objective of this study is to develop a new adjusted Turc equation through introduction of the wind adjustment factor. In this study, data from CLIMWAT database have been divided into two groups in order to verify the model on half of the dataset. As the mean monthly data from CLIMWAT refer to the long-term average year, the detailed Western Balkans (WB) dataset with the monthly data from real years has been used for additional verification of the wind adjustment factor. For each verification station, ET_O estimates from the original and adjusted Turc equations have been statistically compared with FAO-56 Penman-Monteith (PM) ET_O estimates. The adjusted Turc equation provides good agreement with the evapotranspiration, and produces a reliable estimation at all locations. These results support the use of the adjusted Turc equation for estimating reference evapotranspiration at European humid locations where humidity data are not available.
机译：Turc方程是用于估算潮湿条件下的参考蒸散量（ET_O）的最简单的经验方程式之一。但是，该公式通常高估了无风潮湿位置的ET_O值，而低估了有风潮湿位置的ET_O。这项研究的主要目的是通过引入风力调节因子来开发新的调节Turc方程。在这项研究中，来自CLIMWAT数据库的数据被分为两组，以便在数据集的一半上验证模型。由于CLIMWAT的平均每月数据指的是长期平均年份，因此使用了详细的Western Balkans（WB）数据集以及真实年份的每月数据来进一步验证风向调整因子。对于每个验证站，已将原始和调整后的Turc方程中的ET_O估计值与FAO-56 Penman-Monteith（PM）ET_O估计值进行了统计比较。调整后的Turc方程与蒸散量很好地吻合，并在所有位置产生可靠的估计。这些结果支持使用调整后的Turc方程估算在没有湿度数据的欧洲潮湿地区的参考蒸散量。

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