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	A semi-analytical generalized Hvorslev formula for estimating riverbed hydraulic conductivity with an open-ended standpipe permeameter
	Pozdniakov S. P.; Wang, P.; Lekhov, M. V.
	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
内容类型	SCI/SSCI论文
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.

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