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DOI | 10.1029/2018WR022684 |
Generalizing Agarwal's Method for the Interpretation of Recovery Tests Under Non-Ideal Conditions | |
Trabucchi, Michela1,2; Carrera, Jesus1,3; Fernandez-Garcia, Daniel1,2 | |
2018-09-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:9页码:6393-6407 |
文章类型 | Article |
语种 | 英语 |
国家 | Spain |
英文摘要 | Pumping tests are performed during aquifer characterization to gain conceptual understanding about the system through diagnostic plots and to estimate hydraulic properties. Recovery tests consist of measuring head response in observation and/or pumping wells after pumping termination. They are especially useful when the pumping rate cannot be accurately controlled. They have been traditionally interpreted using Theis' recovery method, which yields robust estimates of effective transmissivity but does not provide information about the conceptual model. Agarwal proposed a method that has become standard in the oil industry, to obtain both early and late time reservoir responses to pumping from recovery data. However, the validity of the method has only been tested to a limited extent. In this work, we analyze Agarwal's method in terms of both drawdowns and log derivatives for non-ideal conditions: leaky aquifer, presence of boundaries, and one-dimensional flow. Our results show that Agarwal's method provides excellent recovery plots (i.e., the drawdown curve that would be obtained during pumping) and parameter estimates for nearly all aquifer conditions, provided that a constant pumping rate is used and the log derivative at the end of pumping is constant, which is too limiting for groundwater hydrology practice, where observation wells are usually monitored. We generalize Agarwal's method by (1) deriving an improved equivalent time for time-dependent pumping rate and (2) proposing to recover drawdown curves by extrapolating the pumping phase drawdowns. These yield excellent diagnostic plots, thus facilitating the conceptual model analysis for a broad range of conditions. |
英文关键词 | recovery test time-dependent pumping rate equivalent time hydraulic properties conceptual model |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000448088100033 |
WOS关键词 | STORATIVITY |
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/21033 |
专题 | 资源环境科学 |
作者单位 | 1.UPC, CSIC, Associated Unit Hydrogeol Grp, Barcelona, Spain; 2.UPC, Dept Civil & Environm Engn, Barcelona, Spain; 3.CSIC, Inst Environm Assessment & Water Res IDAEA, Barcelona, Spain |
推荐引用方式 GB/T 7714 | Trabucchi, Michela,Carrera, Jesus,Fernandez-Garcia, Daniel. Generalizing Agarwal's Method for the Interpretation of Recovery Tests Under Non-Ideal Conditions[J]. WATER RESOURCES RESEARCH,2018,54(9):6393-6407. |
APA | Trabucchi, Michela,Carrera, Jesus,&Fernandez-Garcia, Daniel.(2018).Generalizing Agarwal's Method for the Interpretation of Recovery Tests Under Non-Ideal Conditions.WATER RESOURCES RESEARCH,54(9),6393-6407. |
MLA | Trabucchi, Michela,et al."Generalizing Agarwal's Method for the Interpretation of Recovery Tests Under Non-Ideal Conditions".WATER RESOURCES RESEARCH 54.9(2018):6393-6407. |
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