衡水湖蒸发量与污染变化情况研究

Study on Changes of Evaporation and Pollution in Hengshui Lake

利用20 m^(2)蒸发池测得衡水湖水面蒸发量数据,并进行同步计算,得到衡水湖水面蒸发量更接近天然水体的蒸发量,并进一步研究蒸发量的大小与污染物浓度和污染指数的变化情况。通过计算研究蒸发量数据,衡水湖2009—2019年这11年间平均水面蒸发量为764 mm,蒸发量最大值在2015年与2017年,最小值在2013年,衡水湖年际蒸发量变化较小;衡水湖年内平均蒸发量最大值出现在夏季。蒸发量是衡水湖水量损失最主要的途径,研究计算蒸发量可以深入了解衡水湖湖水年损失量,进而合理补水,减小水平衡分析误差,从而改善衡水湖的生态环境。

The present study adopted the observation data from a 20 m^(2) evaporation pond of Hengshui Lake,and the synchronous calculation was carried out and found the water surface evaporation of Hengshui Lake is closer to that of natural water body.Furthermore,the changes of evaporation,pollutant concentration and pollution index were further studied.The results through calculating and investigating the evaporation data showed that the average surface evaporation of Hengshui Lake during 2009-2019 was 764 mm,with the maximum evaporation in 2015 and 2017,and the minimum evaporation in 2013.The annual evaporation of Hengshui Lake varies slightly.The maximum annual average evaporation of Hengshui Lake appears in summer.Evaporation is the main pattern of water loss in Hengshui Lake.The calculation of evaporation can help investigate the annual water loss in Hengshui Lake,and then supplement water reasonably,reduce the error of water balance analysis,and improve the ecological environment of Hengshui Lake.