A new water balance equation introducing dew amount in arid area

被引：0
|
作者：
Wang Z. [1 ,2 ,3 ]
Zhang Z. [1 ]
Suo Y. [1 ]
机构：
[1] Department of Hydraulic Engineering, Tsinghua University, Beijing
[2] State Key Lab of Hydroscience and Engineering, Tsinghua University, Beijing
[3] State Key Lab of Plateau Ecology and Agriculture, Qinghai University, Xining
来源：
Shuili Xuebao/Journal of Hydraulic Engineering | 2019年 / 50卷 / 06期
关键词：
Arid region; Dew; Eddy correlation; Heihe river basin; Water balance;
D O I：
10.13243/j.cnki.slxb.20190129
中图分类号：
学科分类号：
摘要：
Dew, defined as water transported from atmosphere to certain surface due to condensation, was often ignored in water balance calculation. In this study, observation data from nine stations of Heihe Hydrometeorological Observation Network in 2016 was used to calculate and evaluate dew quantity and duration. The results indicated that condensation was common in Heihe river basin that dew was monitored on more than 75% days in all stations. Dew amount of nine stations in 2016 ranged from 6.56mm to 25.13mm, while the mean value was 15.47mm. Calculating the ratio of dew to evapotranspiration, average ratio was 6.61%, while the maximum and minimum ratios were 28.82% and 0.77%, respectively. Ratio of dew to precipitation is 18.54% in average, while the maximum and minimum ratios were 63.25% and 3.02%, respectively. The mean energy balance closure is 0.69. These percentages showed that condensed water in arid areas could not be ignored in water balance. Based on above analysis, this paper proposed that dew should be considered in water balance equation of the arid area. The new water balance calculation in desert showed the new water balance equation effectively increased the closure of water balance equation and improved the accuracy of the water balance equation. © 2019, China Water Power Press. All right reserved.
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页码：710 / 720
页数：10
相关论文
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