干旱区生态环境知识资源中心(Arid): Rainfall intensity affects the recharge mechanisms of groundwater in a headwater basin of the North China plain

Arid

DOI	10.1016/j.apgeochem.2023.105742
	Rainfall intensity affects the recharge mechanisms of groundwater in a headwater basin of the North China plain
	Zheng, Wenbo; Wang, Shiqin; Tan, Kangda; Shen, Yanjun; Yang, Lihu
通讯作者	Wang, SQ
来源期刊	APPLIED GEOCHEMISTRY
ISSN	0883-2927
EISSN	1872-9134
出版年	2023
卷号	155
英文摘要	Understanding the origins of groundwater and its movement from mountain to plain during different high intensity rainfall events is critical for conserving water supplies, determining water-use policies and controlling pollution. These factors are also the keys for understanding the dominant processes in hydrological models. In this study, groundwater resources and recharge processes during heavy precipitation were explored by using stable isotope tracers in the hilly area of Taihang Mountain. It was found that the 82H and 818O values of precipitation exhibited obvious precipitation amount effect during different precipitation intensity events. The stable isotopic values in groundwater and river water showed significantly varied during the single extreme heavy precipitation and the continuous heavy precipitation events. In the rainy season, precipitation amounts greater than 40 mm/d could effectively recharge the shallow groundwater in the study area. By comparing the spatial isotopic distribution of groundwater, soil water, and river water with precipitation, we showed distinct groundwater recharge patterns in terms of their water resources, timing, and the degree of river water and groundwater interaction during the single extreme heavy precipitation and the continuous heavy precipitation. After the single extreme heavy precipitation, the 82H and 818O values of groundwater, soil water, and river water showed stable over time and had the same similar variations, suggested that the groundwater recharge was mainly dominated by precipitation with preferential flow or bypass flow. While after the continuous heavy precipitation, the variation of 82H and 818O in all water is consistent with the previous precipitation, which shown a mixing effect of previous enrich precipitation and depleted heavy precipitation, suggested that groundwater source was dominated by a continuous recharge of previous heavier precipitation with translatory flow. The groundwater main recharge mechanism is not constant, but changes with rainfall intensity. The rainfall intensity play an important role in groundwater recharge change affecting runoff process. Overall, this paper presents a new insight to understand the effect of rainfall intensity on hydrological process, which could be used to provide vital information in the semi-humid and semi-arid regions where water resources are critical in climate change adaptation strategies.
英文关键词	Groundwater recharge Extreme heavy precipitation Continuous heavy precipitation Stable isotopes of water Hilly catchment
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001039391500001
WOS关键词	STABLE-ISOTOPE ; RIVER CATCHMENT ; PRECIPITATION ; HYDROLOGY ; RUNOFF ; IMPACT ; EXPLOITATION ; RESOURCES ; MOUNTAIN ; SIGNALS
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395343
推荐引用方式 GB/T 7714	Zheng, Wenbo,Wang, Shiqin,Tan, Kangda,et al. Rainfall intensity affects the recharge mechanisms of groundwater in a headwater basin of the North China plain[J],2023,155.
APA	Zheng, Wenbo,Wang, Shiqin,Tan, Kangda,Shen, Yanjun,&Yang, Lihu.(2023).Rainfall intensity affects the recharge mechanisms of groundwater in a headwater basin of the North China plain.APPLIED GEOCHEMISTRY,155.
MLA	Zheng, Wenbo,et al."Rainfall intensity affects the recharge mechanisms of groundwater in a headwater basin of the North China plain".APPLIED GEOCHEMISTRY 155(2023).