中国常用观测水面蒸发仪器有E601型、20 m2和20 cm 口径蒸发皿等,实验资料显示,大水体水面蒸发皿观测数据与天然水体蒸发量相比误差较小,可忽略不计.利用衡水水文实验站20 m2蒸发皿观测数据,同步计算出衡水湖水面蒸发量,分析其变化特征,得出衡水湖多年平均水面蒸发量为3 187万m3,极值差572.1万m3,极值比1.20,变差系数0.06.水面蒸发量是水量平衡计算的重要组成部分,利用大水体蒸发皿观测数据计算分析水面蒸发量,对水平衡计算及水资源规划等工作具有重要意义.
Variation Characteristics of Water Surface Evaporation in Hengshui Lake
The calculation of water surface evaporation of Hengshui Lake is an important part of the water balance calculation of Hengshui Lake.The commonly used instruments for observing water surface evaporation include E601 evaporation pan,20 m2 evaporation pan,20 cm diameter evaporation pan,etc.The experimental data showed that the error between the observation data of evaporation pan on the water surface of large water body and the evaporation of natural water body was small and negligible.In this paper,the water surface evaporation of Hengshui Lake was synchronously calculated by using the observation data of the 20 m2 evaporation pool at Hengshui hydrological experimental station,and its change characteristics were analyzed.The average water surface evaporation of Hengshui Lake was 31.87 million m3,the extreme value difference was 5.721 million m3,the extreme value ratio was 1.20,and the coefficient of variation was 0.06.The calculation of water surface evaporation is an important part of water resources work.It is of great significance to calculate and analyze water surface evaporation using the observation data of large water evaporation pan for water balance calculation and water resources planning.
water surface evaporationHengshui Lake20 m2 water surface evaporation panwater surface evaporation pan of large water
万方数据
维普
