干旱区生态环境知识资源中心(Arid): Isotopic and geochemical tracers of groundwater flow in the Shivwits Plateau, Grand Canyon National Park, USA

Arid

DOI	10.1007/s10040-022-02450-3
	Isotopic and geochemical tracers of groundwater flow in the Shivwits Plateau, Grand Canyon National Park, USA
	Wilson, Jonathan W.; Erhardt, Andrea M.; Tobin, Benjamin W.
通讯作者	Wilson, JW (corresponding author)，Univ Kentucky, Dept Earth & Environm Sci, Lexington, KY 40506 USA.
来源期刊	HYDROGEOLOGY JOURNAL
ISSN	1431-2174
EISSN	1435-0157
出版年	2022-02
英文摘要	Understanding patterns of groundwater flow are important when quantifying and mitigating threats to critical groundwater resources. Environmental tracers, determined from discrete sampling, could aid in characterizing spring systems through determining flow paths, recharge areas, and carbon cycling. This study explores the novel inclusion of delta C-13 of dissolved organic carbon (DOC), delta C-13 of dissolved inorganic carbon (DIC) and fluorescent dissolved organic matter (fDOM), along with more commonly used multi-tracer approaches that involve water isotopes, major ions, and saturation indices, to characterize springs of the Shivwits Plateau in Grand Canyon National Park, USA. Carbon isotope ratios and fDOM concentrations for all springs reflect source values associated with regional surface vegetation and heterotrophic degradation of terrestrial DOM. Principal component analyses show that springs can be grouped by geochemical variability into: (1) a shallow epikarst system, (2) a flow path through gypsiferous beds of the Toroweap Formation on the eastern side of the plateau, (3) a short canyon-slope flow path dominated by runoff, and (4) a deeper complex flow system in the Redwall Limestone characteristic of mixing of all other flow systems. As appropriations from the Colorado River already exceed its annual streamflow, characterizing groundwater resources for water supply in an increasingly arid climate will be paramount. These results demonstrate the effectiveness of geochemical techniques for groundwater flow characterization, particularly in inaccessible environments.
英文关键词	Environmental tracers Stable isotopes Geochemistry USA Springs
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000751591700001
WOS关键词	DISSOLVED ORGANIC-MATTER ; INORGANIC CARBON ; KAIBAB PLATEAU ; FLUORESCENCE SPECTROSCOPY ; STABLE-ISOTOPES ; KARST AQUIFERS ; CLIMATE-CHANGE ; LONG-TERM ; WATER ; SOIL
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/2XILL650/377339
作者单位	[Wilson, Jonathan W.; Erhardt, Andrea M.] Univ Kentucky, Dept Earth & Environm Sci, Lexington, KY 40506 USA; [Tobin, Benjamin W.] Univ Kentucky, Kentucky Geol Survey, Lexington, KY 40506 USA
推荐引用方式 GB/T 7714	Wilson, Jonathan W.,Erhardt, Andrea M.,Tobin, Benjamin W.. Isotopic and geochemical tracers of groundwater flow in the Shivwits Plateau, Grand Canyon National Park, USA[J],2022.
APA	Wilson, Jonathan W.,Erhardt, Andrea M.,&Tobin, Benjamin W..(2022).Isotopic and geochemical tracers of groundwater flow in the Shivwits Plateau, Grand Canyon National Park, USA.HYDROGEOLOGY JOURNAL.
MLA	Wilson, Jonathan W.,et al."Isotopic and geochemical tracers of groundwater flow in the Shivwits Plateau, Grand Canyon National Park, USA".HYDROGEOLOGY JOURNAL (2022).