干旱区生态环境知识资源中心(Arid): A Global Assessment of Groundwater Recharge Response to Infiltration Variability at Monthly to Decadal Timescales

Arid

DOI	10.1029/2023WR035828
	A Global Assessment of Groundwater Recharge Response to Infiltration Variability at Monthly to Decadal Timescales
	Moeck, Christian; Collenteur, Raoul A.; Berghuijs, Wouter R.; Luijendijk, Elco; Gurdak, Jason J.
通讯作者	Moeck, C
来源期刊	WATER RESOURCES RESEARCH
ISSN	0043-1397
EISSN	1944-7973
出版年	2024
卷号	60 期号:6
英文摘要	Predictions of groundwater fluctuations in space and time are important for sustainable water resource management. Infiltration variability on monthly to decadal timescales leads to fluctuations in the water tables and thus groundwater resources. However, connections between global-scale climate variability and infiltration patterns and groundwater are often poorly understood because the relationships between groundwater conditions and infiltration tend to be highly nonlinear. In addition, understanding is further hampered because many groundwater records are incomplete and groundwater tables are often anthropogenically influenced, which makes identifying the effects of infiltration variability difficult. Previous studies that have evaluated how infiltration variability controls groundwater are based on a limited number of point measurements. Here, we present a global assessment of how infiltration variability is expected to affect groundwater tables. We use an analytical solution derived from Richards' equation to model water level responses to idealized periodic infiltration variability with periods that range from months to decades, to approximate both the effects of short-term and long-term climate variability and thus infiltration patterns. Our global-scale assessment reveals why infiltration variability would lead to periodicity in groundwater recharge in particular regions. The vadose zone strongly dampens short-term (seasonal and shorter) variations in infiltration fluxes throughout most of Earth's land surface, while infiltration cycles exceeding 1 year would yield transient recharge, except in more arid regions. Our results may help forecasting long-term groundwater tables and could support improving groundwater resource management. Understanding how climate patterns affect groundwater is challenging because infiltration processes are complex and groundwater records are scarce and often incomplete. We use an analytical groundwater model to study the impact of infiltration variability on groundwater tables globally. Our analysis thereby quantifies how strongly groundwater recharge varies as the result of climate and infiltration variability at different timescales, ranging from seasonal fluctuations to multi-year climate phenomena with characteristic lengths similar to the El Ni & ntilde;o/Southern oscillation and Pacific decadal oscillation. Our results show that periodic variations in climate and infiltration often have minimal influence on water tables in arid to semi-arid areas with deep groundwater tables, while, while wetter regions (and/or with shallower groundwater) have more strongly time-varying groundwater conditions. These findings may help to predict future groundwater tables and enhance the management of groundwater resources. The vadose zone globally dampens short-term infiltration fluctuations which stabilizes groundwater level variations Infiltration cycles longer than a year cause transient recharge variation, except in semi-arid and arid regions Soil characteristics impact short-term infiltration fluctuations but have a small effect on recharge dampening at longer infiltration cycles
英文关键词	groundwater recharge global climate variability vadose zone flow non-stationary groundwater tables long-term water resource management
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001248482400001
WOS关键词	HIGH-PLAINS AQUIFER ; ATMOSPHERE TELECONNECTION PATTERNS ; KARST SPRING DISCHARGE ; CLIMATE TELECONNECTIONS ; LEVEL RESPONSE ; MODEL ; WATER ; PRECIPITATION ; DROUGHT ; FLOW
WOS类目	Environmental Sciences ; Limnology ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405931
推荐引用方式 GB/T 7714	Moeck, Christian,Collenteur, Raoul A.,Berghuijs, Wouter R.,et al. A Global Assessment of Groundwater Recharge Response to Infiltration Variability at Monthly to Decadal Timescales[J],2024,60(6).
APA	Moeck, Christian,Collenteur, Raoul A.,Berghuijs, Wouter R.,Luijendijk, Elco,&Gurdak, Jason J..(2024).A Global Assessment of Groundwater Recharge Response to Infiltration Variability at Monthly to Decadal Timescales.WATER RESOURCES RESEARCH,60(6).
MLA	Moeck, Christian,et al."A Global Assessment of Groundwater Recharge Response to Infiltration Variability at Monthly to Decadal Timescales".WATER RESOURCES RESEARCH 60.6(2024).