Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016WR020311 |
Vertical groundwater storage properties and changes in confinement determined using hydraulic head response to atmospheric tides | |
Acworth, R. Ian1,2; Rau, Gabriel C.1,2; Halloran, Landon J. S.1,2; Timms, Wendy A.1,3 | |
2017-04-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia |
英文摘要 | Accurate determination of groundwater state of confinement and compressible storage properties at vertical resolution over depth is notoriously difficult. We use the hydraulic head response to atmospheric tides at 2 cpd frequency as a tracer to quantify barometric efficiency (BE) and specific storage (S-s) over depth. Records of synthesized Earth tides, atmospheric pressure, and hydraulic heads measured in nine piezometers completed at depths between 5 and 55 m into unconsolidated smectitic clay and silt, sand and gravel were examined in the frequency domain. The barometric efficiency increased over depth from similar to 0.05 in silty clay to similar to 0.15 in sands and gravels. BE for silty clay was confirmed by calculating the loading efficiency as 0.95 using rainfall at the surface. Specific storage was calculated using effective rather than total moisture. The differences in phase between atmospheric pressure and hydraulic heads at 2 cpd were similar to 180 degrees below 10 m indicating confined conditions despite the low BE. Heads in the sediment above a fine sand and silt layer at 12 m exhibited a time variable phase difference between 0 degrees and 180 degrees indicating varying confinement. Our results illustrate that the atmospheric tide at 2 cpd is a powerful natural tracer for quantifying groundwater state of confinement and compressible storage properties in layered formations from hydraulic heads and atmospheric pressure records without the need for externally induced hydraulic stress. This approach could significantly improve the development of conceptual hydrogeological model used for groundwater resource development and management. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000403682600027 |
WOS关键词 | LIVERPOOL PLAINS ; EARTH TIDES ; SURFACE ; CLAY ; AUSTRALIA ; SYSTEMS ; FLOW ; SOIL |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/20102 |
专题 | 资源环境科学 |
作者单位 | 1.UNSW Australia, Sch Civil & Environm Engn, Connected Waters Initiat Res Ctr, Sydney, NSW, Australia; 2.UNSW Australia, Sch Civil & Environm Engn, Water Res Lab, Manly Vale, NSW, Australia; 3.UNSW Australia, Sch Min Engn, Sydney, NSW, Australia |
推荐引用方式 GB/T 7714 | Acworth, R. Ian,Rau, Gabriel C.,Halloran, Landon J. S.,et al. Vertical groundwater storage properties and changes in confinement determined using hydraulic head response to atmospheric tides[J]. WATER RESOURCES RESEARCH,2017,53(4). |
APA | Acworth, R. Ian,Rau, Gabriel C.,Halloran, Landon J. S.,&Timms, Wendy A..(2017).Vertical groundwater storage properties and changes in confinement determined using hydraulic head response to atmospheric tides.WATER RESOURCES RESEARCH,53(4). |
MLA | Acworth, R. Ian,et al."Vertical groundwater storage properties and changes in confinement determined using hydraulic head response to atmospheric tides".WATER RESOURCES RESEARCH 53.4(2017). |
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