测定农田蒸散的涡度相关技术

Field Evapotranspi ration Measurement Based on Eddy Covariance Technology

主要介绍涡度相关技术测定湍流通量的原理,及其在农田蒸散量测定方面的国内外应用研究进展。讨论了引起涡度相关技术测定农田蒸散误差的主要原因,并分析采用涡度相关系统测定的水、热通量资料的可靠性,提出进行涡度相关技术测定资料分析时剔除异常数据和进行数据修正的方法。

The principle of measuring turbulent flux by eddy covariance system and its application to field evapotranspiration measurement were introduced in this paper. The main factors that caused the errors of field evapotranspiration value were discussed, the accuracy of eddy covariance water and heat flux records was analyzed, the method for eliminating abnormal data and making data correction were brought forward in analysis of eddy covariance measurement.