气候变化领域集成服务门户(CCPortal): Identifying recharge under subtle ephemeral features in a flat-lying semi-arid region using a combined geophysical approach

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DOI	10.5194/hess-24-4353-2020
	Identifying recharge under subtle ephemeral features in a flat-lying semi-arid region using a combined geophysical approach
	Flinchum B.A.; Banks E.; Hatch M.; Batelaan O.; Peeters L.J.M.; Pasquet S.
发表日期	2020
ISSN	1027-5606
起始页码	4353
结束页码	4368
卷号	24 期号:9
英文摘要	Identifying and quantifying recharge processes linked to ephemeral surface water features is challenging due to their episodic nature. We use a combination of well-established near-surface geophysical methods to provide evidence of a surface and groundwater connection under a small ephemeral recharge feature in a flat, semi-arid region near Adelaide, Australia. We use a seismic survey to obtain P-wave velocity through travel-time tomography and S-wave velocity through the multichannel analysis of surface waves. The ratios between P-wave and S-wave velocities are used to calculate Poisson's ratio, which allow us to infer the position of the water table. Separate geophysical surveys were used to obtain electrical conductivity measurements from time-domain electromagnetics and water contents from downhole nuclear magnetic resonance. The geophysical observations provide evidence to support a groundwater mound underneath a subtle ephemeral surface water feature. Our results suggest that recharge is localized and that small-scale ephemeral features may play an important role in groundwater recharge. Furthermore, we show that a combined geophysical approach can provide a perspective that helps shape the hydrogeological conceptualization of a semi-arid region. © 2020 Author(s).
语种	英语
scopus关键词	Acoustic wave velocity; Arid regions; Geological surveys; Geophysics; Seismic waves; Shear waves; Surface waters; Surface waves; Time domain analysis; Wave propagation; Electrical conductivity measurements; Geophysical methods; Geophysical observations; Geophysical surveys; Ground water recharge; Multi-channel analysis of surface waves; Time domain electromagnetics; Travel time tomography; Recharging (underground waters); electrical conductivity; ephemeral stream; geophysical survey; groundwater flow; groundwater-surface water interaction; recharge; seismic data; semiarid region; wave velocity
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159313
作者单位	Flinchum, B.A., Commonwealth Scientific Industrial Research Organization (CSIRO), Deep Earth Imaging Future Science Platformĝ€¯and Land and Water, Urrbrae, 5064, Australia; Banks, E., National Centre for Groundwater Research and Training, College of Science and Engineering, Flinders University, Adelaide, 5001, Australia; Hatch, M., National Centre for Groundwater Research and Training, College of Science and Engineering, Flinders University, Adelaide, 5001, Australia, Department of Geosciences, School of Physics, University of Adelaide, Adelaide, Australia; Batelaan, O., National Centre for Groundwater Research and Training, College of Science and Engineering, Flinders University, Adelaide, 5001, Australia; Peeters, L.J.M., Commonwealth Scientific Industrial Research Organization (CSIRO), Deep Earth Imaging Future Science Platformĝ€¯and Land and Water, Urrbrae, 5064, Australia; Pasquet, S., Université de Paris, Institut de Physique du Globe de Paris, CNRS, Paris, 75005, France
推荐引用方式 GB/T 7714	Flinchum B.A.,Banks E.,Hatch M.,et al. Identifying recharge under subtle ephemeral features in a flat-lying semi-arid region using a combined geophysical approach[J],2020,24(9).
APA	Flinchum B.A.,Banks E.,Hatch M.,Batelaan O.,Peeters L.J.M.,&Pasquet S..(2020).Identifying recharge under subtle ephemeral features in a flat-lying semi-arid region using a combined geophysical approach.Hydrology and Earth System Sciences,24(9).
MLA	Flinchum B.A.,et al."Identifying recharge under subtle ephemeral features in a flat-lying semi-arid region using a combined geophysical approach".Hydrology and Earth System Sciences 24.9(2020).