干旱区生态环境知识资源中心(Arid): Impacts of long-term climate change on the groundwater flow dynamics in a regional groundwater system: Case modeling study in Alashan, China

Arid

DOI	10.1016/j.jhydrol.2020.125557
	Impacts of long-term climate change on the groundwater flow dynamics in a regional groundwater system: Case modeling study in Alashan, China
	Zhou, Pengpeng; Wang, Guangcai; Duan, Ruiqi
通讯作者	Zhou, PP (corresponding author), China Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China. ; Zhou, PP (corresponding author), China Univ Geosci Beijing, MOE Key Lab Groundwater Circulat & Environm Evolu, Beijing 100083, Peoples R China.
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2020
卷号	590
英文摘要	Groundwater flow dynamics plays a crucial role in social development and ecosystem protection. This study investigated the impacts of long-term climate change on the regional groundwater flow in Alashan, China to reveal the spatial variability of groundwater flow response to climate change and the dynamic patterns of both deep and shallow groundwater flow velocity. To this end, the hydrogeologic conditions and climate evolution history were analyzed. Based on these, four future scenarios of long-term climate change were designed, including linearly varying and cyclic changes, and numerical groundwater flow modeling was then conducted to investigate the effects of long-term climate changes on groundwater flow dynamics (including groundwater level and flow velocity). It was found that groundwater level dynamics were notably influenced by climate changes; the time scale and initial change pattern of cyclic climate influenced the amplitude and mean level of groundwater level fluctuations. In addition, our results also revealed that, for a regional groundwater system, climate change impacts on groundwater level had obvious spatial variability. Groundwater level in recharge and discharge areas were sensitive to drying and wetting climates, respectively. Thus, the spatial variability of groundwater level dynamics reflected climate change information. Moreover, groundwater flow velocity dynamics were also affected by climate changes. However, linearly varying and cyclic climates had different influences. Linearly wetting climate generally increased the groundwater flow velocity in recharge and discharge areas, but decreased that in runoff area, whereas cyclic climate induced periodical fluctuation of groundwater flow velocity. The fluctuation period of shallow groundwater flow velocity matched the full climate cycle period, whereas of the deep groundwater flow velocity was only half. This unique behavior of deep groundwater flow velocity is caused by fluctuation of the vertical velocity alternating between positive (upward flow) and negative (downward flow) values. This finding of groundwater flow velocity dynamics contributes to deeper understanding of long-term climate change effects on groundwater flow dynamics.
英文关键词	Climate change Numerical modeling Groundwater flow dynamics Flow velocity
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000599754500246
WOS关键词	LEVEL RADIOACTIVE-WASTE ; TENGGER-DESERT ; GEOLOGICAL DISPOSAL ; TEMPORAL VARIATIONS ; NORTHWESTERN CHINA ; PART I ; PRECIPITATION ; CATCHMENT ; EVOLUTION ; AQUIFER
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
来源机构	中国科学院地质与地球物理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349010
作者单位	[Zhou, Pengpeng; Wang, Guangcai] China Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China; [Zhou, Pengpeng; Wang, Guangcai] China Univ Geosci Beijing, MOE Key Lab Groundwater Circulat & Environm Evolu, Beijing 100083, Peoples R China; [Duan, Ruiqi] Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Pengpeng,Wang, Guangcai,Duan, Ruiqi. Impacts of long-term climate change on the groundwater flow dynamics in a regional groundwater system: Case modeling study in Alashan, China[J]. 中国科学院地质与地球物理研究所,2020,590.
APA	Zhou, Pengpeng,Wang, Guangcai,&Duan, Ruiqi.(2020).Impacts of long-term climate change on the groundwater flow dynamics in a regional groundwater system: Case modeling study in Alashan, China.JOURNAL OF HYDROLOGY,590.
MLA	Zhou, Pengpeng,et al."Impacts of long-term climate change on the groundwater flow dynamics in a regional groundwater system: Case modeling study in Alashan, China".JOURNAL OF HYDROLOGY 590(2020).