干旱区生态环境知识资源中心(Arid): 干旱区凝结水评估及对水量平衡方程影响

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	干旱区凝结水评估及对水量平衡方程影响
其他题名	A new water balance equation introducing dew amount in arid area
	王忠静 1; 张子雄 2; 索滢 2
来源期刊	水利学报
ISSN	0559-9350
出版年	2019
卷号	50 期号:6 页码:710-720
中文摘要	凝结水是大气中水汽通过凝结作用向地表输送的水分,在水量平衡计算中常被忽略。本文利用西北干旱区黑河水文气象观测网9个站点2016年涡度相关观测数据,计算评估了相应站点范围的凝结水发生情况、凝结水量量级以及相应的能量闭合度情况。结果表明,黑河流域凝结水现象普遍发生,各站点产生凝结水的天数占全年天数75%以上;各站点年凝结水量最大25.13 mm、最小6.56 mm、平均15.47 mm;各站点总凝结水量与总蒸散发量相比,最大28.82%、最小0.77%、平均6.61%;与总降水量相比,最大63.25%、最小3.02%、平均18.54%;各站点能量闭合度平均为0.69,本文估算的凝结水量或低于实际凝结水量。可以认为,凝结水在干旱区水量平衡中不容忽视。基于此,本文提出在干旱区水量平衡方程中,宜显式表达凝结水过程和凝结水项。引入凝结水的水量平衡分析表明,新水量平衡方程在纳入凝结水这一局地水循环因子后,水量平衡方程闭合度明显提高。
英文摘要	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.
中文关键词	凝结水 ; 干旱区 ; 涡度相关 ; 水量平衡 ; 黑河流域
英文关键词	dew arid region eddy correlation water balance Heihe river basin
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6522803
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239510
作者单位	1.清华大学水利水电工程系;;清华大学;;青海大学, ;;水沙科学与水利水电工程国家重点实验室;;青海省部共建三江源生态与高原木业国家重点实验室, ;;;;西宁, 北京;;北京;;青海 100084;;100084;;810016, 中国; 2.清华大学水利水电工程系, 北京 100084, 中国
推荐引用方式 GB/T 7714	王忠静,张子雄,索滢. 干旱区凝结水评估及对水量平衡方程影响[J],2019,50(6):710-720.
APA	王忠静,张子雄,&索滢.(2019).干旱区凝结水评估及对水量平衡方程影响.水利学报,50(6),710-720.
MLA	王忠静,et al."干旱区凝结水评估及对水量平衡方程影响".水利学报 50.6(2019):710-720.