摘要
本文根据鄱阳湖都昌蒸发实验站1981～1988年的实验资料,对计算水面蒸发的彭曼公式作了修订.重点讨论了总辐射和干燥力.由总辐射、有效辐射和干燥力的不同类型公式进行组合优选,得出彭曼修正式.修正后的公式精度明显提高.年平均蒸发量相对误差小于4％.月蒸发量相对误差<±15％的精度为85％,<±20％的精度为92％.成果令人满意,可用于鄱阳湖及其邻近地区的水面蒸发计算.
Poyang lake is the largest fresh water lake in China.Based on the evaporation data from Duchang Evaporation Station,Penman's formula for calculating evaporation from water surface is modified.Following an in-depth discussion of the glabal radiation and the drying power,various types of formulas of the glabal radiation,the effective radiation and the drying power are combined and optimized and new formulas are estabalished.Calculations show that the formulas are more accurate than Penman's formula.The relative error of annual mean evaporation is less than 4%.As a as monthly evaporation is concerned,the accuracy of calculation is 85% for the relative error(<± 15%)and 92% for the relative error(<±20%).The result shows that it can be used to estimate the evaporation from water surfaces of Poyang Lake and nearby districts.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
1990年第6期30-40,共11页
Journal of Hohai University(Natural Sciences)
关键词
鄱阳湖
水面
蒸发
太阳
辐射
evaporation from water surfaces
the glabal radiation
Penman's formula
