干旱区生态环境知识资源中心(Arid): A dynamic harmonic regression approach to estimating groundwater evapotranspiration based on diurnal groundwater-level fluctuations

Arid

DOI	10.1007/s10040-023-02719-1
	A dynamic harmonic regression approach to estimating groundwater evapotranspiration based on diurnal groundwater-level fluctuations
	Huang, Jinting; Wang, Jiawei; Zhou, Yangxiao; Fang, Tuo; Ning, Bohan; Song, Ge; Huang, Tian; Li, Linghua; Yang, Zhan; Lv, Qiu; Pu, Fang; Li, Zongze; Wang, Wenke
通讯作者	Huang, JT
来源期刊	HYDROGEOLOGY JOURNAL
ISSN	1431-2174
EISSN	1435-0157
出版年	2024
卷号	32 期号:1 页码:253-266
英文摘要	Groundwater evapotranspiration (ETg) is a significant component of water and energy balance analyses in arid and semiarid environments; however, it is also one of the most challenging items to estimate. Estimation of ETg using diurnal groundwater-level fluctuation is considered cost-effective and straightforward, while more accurate estimation technology continues to be developed due to the complex set of factors that influence the variation of groundwater level. This paper proposes a method for calculating ETg that combines the analytical solution of the Boussinesq equation and dynamic harmonic regression analysis, which is a nonstationary approach to groundwater-level signal extraction. The presented approach can calculate ETg values with a high time resolution consistent with the groundwater-level monitoring frequency, and it is robust enough to handle large amounts of measurement data. More importantly, this method eliminates the influence of recharge during the groundwater-level-rise stage. The method is tested in bushland dominated by Sminthopsis psammophila in Mu Us Desert (northern China), which has a shallow water table. The results show that this method is easy to perform and it obtains a reasonable estimate of ETg in the unfrozen seasons, regardless of the disturbance of recharge that results in a sharp rise in groundwater level. However, the method does not work well in the frozen seasons because of the physical mechanisms of change in groundwater movement in the vadose zone and a strong barometric effect. Overall, the method provides a step toward accuracy of ETg estimation using diurnal groundwater-level fluctuation, and this paper provides guidelines for its use.
英文关键词	Evapotranspiration Diurnal groundwater level fluctuation Boussinesq equation Dynamic harmonic regression Arid regions
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001080658200001
WOS关键词	WATER-TABLE FLUCTUATIONS ; VEGETATION ; RATES
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404094
推荐引用方式 GB/T 7714	Huang, Jinting,Wang, Jiawei,Zhou, Yangxiao,et al. A dynamic harmonic regression approach to estimating groundwater evapotranspiration based on diurnal groundwater-level fluctuations[J],2024,32(1):253-266.
APA	Huang, Jinting.,Wang, Jiawei.,Zhou, Yangxiao.,Fang, Tuo.,Ning, Bohan.,...&Wang, Wenke.(2024).A dynamic harmonic regression approach to estimating groundwater evapotranspiration based on diurnal groundwater-level fluctuations.HYDROGEOLOGY JOURNAL,32(1),253-266.
MLA	Huang, Jinting,et al."A dynamic harmonic regression approach to estimating groundwater evapotranspiration based on diurnal groundwater-level fluctuations".HYDROGEOLOGY JOURNAL 32.1(2024):253-266.