Title | Slug tests in the presence of background head trends |
Publication Type | Journal Article |
Year of Publication | 2010 |
Authors | Ostendorf DW, Degroot DJ |
Journal | Groundwater |
Volume | 48 |
Issue | 4 |
Start Page | 609 |
Pagination | 609-613 |
Date Published | 07/2010 |
Abstract | 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. |
DOI | 10.1111/j.1745-6584.2010.00706.x |