Estimation of annual actual evapotranspiration from nonsaturated land surfaces with conventional meteorological data
Estimation of annual actual evapotranspiration from nonsaturated land surfaces with conventional meteorological data
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DOI：
10.1360/03yd0183-x
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发表时间：
2004-03
影响因子：
5.7
通讯作者：
Q. Xinfa;Zeng Yan;Miao Qilong;Y. Qiang
中科院分区：
文献类型：
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作者：
Q. Xinfa;Zeng Yan;Miao Qilong;Y. Qiang
关于实际蒸散量（AE）和潜在蒸散量（PE）之间的关系，观点分歧很大。 Penman 表明，AE 的强度由 PE 决定，并作为 PE 的函数按比例变化。相比之下，Bouchet 指出 AE 决定 PE，并且与 PE 成反比。基于中国432个气象站和512个水文站近30年的数据，在9个流域对Penman假设和Bouchet互补关系两种不同的理论进行了检验。通过数据集成技术，将AE与PE之间的互补关系完整展现。在深入分析PE概念的基础上，建立了通过常规气象观测估算非饱和地表实际蒸散量的通用模型。结果表明，除黄河流域少数年份外，计算误差均控制在<10%以内。
Views diverge greatly on the relationship between actual evapotranspiration (AE) and potential evapotranspiration (PE). Penman showed that AE is determined in intensity by PE and changes proportionally as a function of PE. In contrast, Bouchet indicated that AE determines PE and varies inversely with PE. Based on nearly 30 years data from 432 weather stations and 512 hydrological stations in China, the two different theories, Penman’s assumption and Bouchet’s complementary relationship between AE and PE, were tested on nine river basins. With data integration technique, the complementary relationship between AE and PE was displayed entirely. A general model to estimate the actual evapotranspiration from nonsaturated surfaces by routine meteorological observations has been established on the basis of thorough analysis of the concept of PE. The results show that the calculations are all in error control of <10%, except for a few years over the Yellow River Basin.