中文摘要：

互补相关原理反映了区域蒸发能力和实际蒸发的互补关系，可根据常规气象观测资料计算区域实际蒸发量，但目前主要用于湿润、半湿润地区。本文利用位于干旱区的新疆叶尔羌河平原绿洲的水文、气象观测资料，用水量平衡模型计算了年实际蒸发量，用修正Penman公式计算了年蒸发能力，验证了互补相关原理在该绿洲的适用性。利用CRAE（Complementary Relationship Areal Evapotranspiration）模计算了绿洲的月蒸发量，年蒸发总量与利用水量平衡方法计算得到的结果基本一致，且蒸发量年内变化过程比较合理，表明利用CRAE模型计算干旱区绿洲月蒸发量是可行的。

英文摘要：

The complementary relationship indicates the relationship between regional potential and actual evapotranspiration, which can be used to calculate regional evapotranspiration from available meteorological data. However, relevant models were mainly used in humid and sub-humid areas. By using hydrological and meteorological data in the Yerqiang Oasis in arid area in Xinjiang, annual actual evapotranspiration was calculated with water balance model, and annual potential evapotranspiration was calculated with the modified Penman equation. The results show that the complementary relationship between potential and actual evapotranspiration is applicable in the Yerqiang Oasis. Monthly evapotranspiration was calculated with the CRAE （Complementary Relationship Areal Evapotranspiration） model. The results of annual evapotranspiration are close to water balance results, and the variation of monthly evapotranspiration is also rational. These show that CRAE model is applicable in estimating monthly evapotranspiration in arid oasis.