衡水湖水面蒸发量计算

湖泊水面蒸发量是水量平衡的一个重要组成部分。目前常用的水面观测仪器有20cm口径蒸发皿、80cm口径套盆蒸发器、E601型蒸发器等，其观测值与天然水面蒸发量存在一定的差距。根据实验资料分析，大水体水面蒸发资料接近于天然水面蒸发量。本文采用衡水试验站20m^2蒸发池观测资料，对衡水湖水面蒸发量进行同步计算．能真实地反映衡水湖水面蒸发情况。通过对衡水湖水面蒸发量计算，衡水湖多年平均水面蒸发量2939万m^3.水面蒸发量是水资源规划等管理工作中不可缺少的项目，采用大水体观测资料分析计算水面蒸发量，较准确地计算出水面蒸发量．对水资源利用及水量平衡计算有重要作用。

Calculation on Water Surface Evaporation of Hengshui Lake

Water surface evaporation of lake plays an important role in water quantity balance. At present, the common observation equipment of water surface includes 20cm evaporating basin, 80cm casing basin evaporator, E601 evaporator and so on. The observation value is different from evaporation of natural water surface. According to the experiment data analysis, water surface evaporation of water body is similar to evaporation of natural water surface. The passage adopted observation data from 20m^2 evaporation pond of Experiment Station in Hengshui, calculated water surface evaporation of Hengshui Lake, and actually reflected water surface evaporation situations of Hengshui Lake. Through calculating water surface evaporation in Hengshui Lake, the average water surface evaporation of years is 29.39 million m^3. Water surface evaporation is necessary in management of water resource plan. Using observation data analysis of water body, it calculated water surface evaporation accurately and played an important part in water resource utilization and water quantity balance calculation.