摘要
水面蒸发是水循环过程中的一个重要环节,在水资源评价、水文模型确定、水利水电工程中都需要精确的水面蒸发资料。世界气象组织推荐的标准蒸发池为20m2蒸发池[1]。根据衡水水文实验站1985年-2008年20m2蒸发池水面蒸发资料,分析了蒸发量年内年际变化特征,年蒸发量呈减少趋势;探求与E-601型蒸发器折算系数的变化特征及昼夜折算系数的差别;建立了水面蒸发量与气象因子的经验公式,相关性很好。
The water surface evaporation is an important link of water cycle process. The precise water surface evaporation material is needed in the water resources appraisal, the hydrology model determination and the water conservancy and hydropower project. The 20m^2 evaporation pool is recommended as a standard evaporation pool by the World Meteorological Organization. According to water surface evaporation material of the 20m^2 evaporation pool in the hydrology experimental station of Hengshui during 1985 to 2008, water surface evaporates variation of yearly and annual rate are analyzed. The year transpiration rate shows the reducing tendency. The change of E-601 evaporator conversion coefficient, the difference of day and night evaporating rate conversion coefficient are approached;experienced formula of the water surface evaporation rate and various meteorological factors are established, the relevance is good.
出处
《南水北调与水利科技》
CAS
CSCD
2009年第5期66-69,共4页
South-to-North Water Transfers and Water Science & Technology
关键词
20m2蒸发池
水面蒸发量
折算系数
气象因子
经验公式
20m^2 evaporation pool
water surface evaporates
conversion coefficient
meteorological factors
experienced formula
