DOI: 10.1029/2018JF004660
Scopus记录号: 2-s2.0-85052370437
论文题名: Quantifying Compressible Groundwater Storage by Combining Cross-Hole Seismic Surveys and Head Response to Atmospheric Tides
作者: Rau G.C. ; Acworth R.I. ; Halloran L.J.S. ; Timms W.A. ; Cuthbert M.O.
刊名: Journal of Geophysical Research: Earth Surface
ISSN: 21699003
出版年: 2018
卷: 123, 期: 8 起始页码: 1910
结束页码: 1930
语种: 英语
英文关键词: compressible groundwater storage
; cross-hole seismics
; groundwater resources
; specific storage
英文摘要: Groundwater specific storage varies by orders of magnitude, is difficult to quantify, and prone to significant uncertainty. Estimating specific storage using aquifer testing is hampered by the nonuniqueness in the inversion of head data and the assumptions of the underlying conceptual model. We revisit confined poroelastic theory and reveal that the uniaxial specific storage can be calculated mainly from undrained poroelastic properties, namely, uniaxial bulk modulus, loading efficiency, and the Biot-Willis coefficient. In addition, literature estimates of the solid grain compressibility enables quantification of subsurface poroelastic parameters using field techniques such as cross-hole seismic surveys and loading efficiency from the groundwater responses to atmospheric tides. We quantify and compare specific storage depth profiles for two field sites, one with deep aeolian sands and another with smectitic clays. Our new results require bulk density and agree well when compared to previous approaches that rely on porosity estimates. While water in clays responds to stress, detailed sediment characterization from a core illustrates that the majority of water is adsorbed onto minerals leaving only a small fraction free to drain. This, in conjunction with a thorough analysis using our new method, demonstrates that specific storage has a physical upper limit of (Formula presented.) m−1. Consequently, if larger values are derived using aquifer hydraulic testing, then the conceptual model that has been used needs reappraisal. Our method can be used to improve confined groundwater storage estimates and refine the conceptual models used to interpret hydraulic aquifer tests. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113405
Appears in Collections: 气候减缓与适应
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作者单位: Connected Waters Initiative Research Centre (CWI), UNSW SydneyNSW, Australia; Water Research Laboratory, School of Civil and Environmental Engineering, UNSW SydneyNSW, Australia; Centre d'Hydrogéologie et de Géothermie (CHYN), Université de Neuchâtel, Neuchâtel, Switzerland; School of Minerals and Energy Resource Engineering, UNSW SydneyNSW, Australia; School of Earth and Ocean Sciences, Cardiff University, Cardiff, United Kingdom
Recommended Citation:
Rau G.C.,Acworth R.I.,Halloran L.J.S.,et al. Quantifying Compressible Groundwater Storage by Combining Cross-Hole Seismic Surveys and Head Response to Atmospheric Tides[J]. Journal of Geophysical Research: Earth Surface,2018-01-01,123(8)