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Slug Tests in the Presence of Background Head Trends
Author(s) -
Ostendorf David W.,
DeGroot Don J.
Publication year - 2010
Publication title -
groundwater
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.84
H-Index - 94
eISSN - 1745-6584
pISSN - 0017-467X
DOI - 10.1111/j.1745-6584.2010.00706.x
Subject(s) - head (geology) , falling (accident) , slug test , geology , geotechnical engineering , paleontology , psychology , psychiatry , aquifer , groundwater
We extend Bouwer and Rice (1976) slug test theory to incorporate background head trends that may be important in incompressible material of low permeability k . The extension, which features a convolution integral of the background head, is closed form for linear trends. A sensitivity study suggests that a rising background head can diminish the head changes associated with a slug‐out test and underestimate k if it is ignored, as does falling background trend with a slug‐in test. A falling background head can reinforce slug‐in test head change and, if ignored, can overestimate k , as does a rising background head with a slug‐out test. The simple extension is verified by field tests in glacial till and stratified drift deposits in eastern Massachusetts.