车尔臣河流域水面蒸发折算系数分析

Conversion Coefficient of Water Surface Evaporation in Cheerchen River Basin

根据车尔臣河流域且末水文站1991—2004年间,20cm口径小型蒸发器与E601型蒸发器同期观测资料,估算了20cm小型蒸发器对E601型蒸发器的蒸发折算系数,分析了其变化特征,并将其与库尔勒市及我国新蒙区年水面蒸发折算系数进行了对比。结果表明,车尔臣河流域冻结期(10月—次年3月)的水面蒸发虽然微弱,但不能忽略,水面蒸发折算系数在非冻结期呈先增后减趋势,年际变化较小。该结果可供车尔臣河流域水量平衡研究、水资源评价、生态需水计算时参考。

Based on the climate data observed synchronously in Qiemo hydrometric station from 1991 to 2004, this paper evaluated the evaporation conversion coefficient from 20cm pan to E601 type evaporator, analyzed the coefficients changing characteristics. The evaporation conversion coefficients of Cheerchen river basin was compared with that of Kuerle city and that in Xinjiang- Mongolia basin. The results showed that the water surface evaporation intensity was small during the freezing period （Oct. to next Mar.）, but can not be neglected. The trend of conversion coefficient increased first and then decreased during the nonfreezing period, its interannual change was small. The results provided references for water balance research, water resources evaluation and ecological water demand calculation in Cheerchen river basin