A semi-analytical generalized Hvorslev formula for estimating riverbed hydraulic conductivity with an open-ended standpipe permeameter
文献类型：SCI/SSCI论文
| 作者 | Pozdniakov S. P.; Wang, P. ; Lekhov, M. V.
|
| 发表日期 | 2016 |
| 关键词 | Surface-groundwater exchange Hydraulic conductivity Slug tests Riverbed sediments Hydraulic resistance Superposition surface-water interactions groundwater stream infiltration variability aquifer system |
| 英文摘要 | The well-known Hvorslev (1951) formula was developed to estimate soil permeability using single-well slug tests and has been widely applied to determine riverbed hydraulic conductivity using in situ standpipe permeameter tests. Here, we further develop a general solution of the Hvorslev (1951) formula that accounts for flow in a bounded medium and assumes that the bottom of the river is a prescribed head boundary. The superposition of real and imaginary disk sources is used to obtain a semi-analytical expression of the total hydraulic resistance of the flow in and out of the pipe. As a result, we obtained a simple semi-analytical expression for the resistance, which represents a generalization of the Hvorslev (1951). The obtained expression is benchmarked against a finite-element numerical model of 2-D flow (in r-z coordinates) in an anisotropic medium. The results exhibit good agreement between the simulated and estimated riverbed hydraulic conductivity values. Furthermore, a set of simulations for layered, stochastically heterogeneous riverbed sediments was conducted and processed using the proposed expression to demonstrate the potential associated with measuring vertical heterogeneity in bottom sediments using a series of standpipe permeameter tests with different lengths of pipe inserted into the riverbed sediments. (C) 2016 Elsevier B.V. All rights reserved. |
| 出处 | Journal of Hydrology |
| 卷 | 540 |
| 页 | 736-743 |
| 语种 | 英语 |
| ISSN号 | 0022-1694 |
| DOI标识 | 10.1016/j.jhydrol.2016.06.061 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/43169]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Pozdniakov S. P.,Wang, P.,Lekhov, M. V.. A semi-analytical generalized Hvorslev formula for estimating riverbed hydraulic conductivity with an open-ended standpipe permeameter. 2016. |
入库方式： OAI收割
来源：地理科学与资源研究所
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