陆面蒸发估算的CRAE模型探讨

蒸发是陆面过程中联系能量和水分循环的重要过程。蒸发模拟估算在流域水资源研究和农业生产等方面具有现实意义。概述了互补相关（CRAE）模型的结构及其应用与发展。CRAE模型在实际应用中避开了复杂的土壤-植被系统，只输入常规的气象资料，即气温、日照、湿度，就可以估算陆面蒸发。CRAE模拟的流域年蒸发量误差在1%~10%具有较好的拟合性。因此，CRAE模型在流域蒸发估算、水文资源分析、农业生产中有较强的应用性。

Discussion of CRAE model in Evaporation Assessment of Terrestrial Surface

Evaporation is an important process in terrestrial energy and water circle. It is important that evaporation assessment in research of catchments water resource analyses and agricultural production. So it will be widely applied. We summarized the frame and application of Complementary Relationship Areal Evapotranspiration (CRAE) model. The advantage of the model is that it estimates actual evapotranspiration from observations of temperature, humidity and sunshine duration over a wider range of regions without the requirement for factors or assumptions associated with the soil-vegetation system. The result shows that the CRAE model seems effective for estimating catchment evapotranspiration.