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ASTM D4104-96

Historical Revision

Standard Test Method (Analytical Procedure) for Determining Transmissivity of Nonleaky Confined Aquifers by Overdamped Well Response to Instantaneous Change in Head (Slug Tests)

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1.1 This test method covers the determination of transmissivity from the measurement of force-free (overdamped) response of a well-aquifer system to a sudden change of water level in a well. Force-free response of water level in a well to a sudden change in water level is characterized by recovery to initial water level in an approximate exponential manner with negligible inertial effects.

1.2 The analytical procedure in this test method is used in conjunction with the field procedure in Test Method D4044 for collection of test data.

1.3 Limitations -Slug tests are considered to provide an estimate of transmissivity. The determination of aquifer storage coefficient is less reliable. Although the assumptions of this test method prescribe a fully penetrating well (a well open through the full thickness of the aquifer), the slug test method is commonly conducted using a partially penetrating well. Such a practice may be acceptable for application under conditions in which the aquifer is stratified and horizontal hydraulic conductivity is much greater than vertical hydraulic conductivity. In such a case the test would be considered to be representative of the average hydraulic conductivity of the portion of the aquifer adjacent to the open interval of the well.

1.4 The values stated in SI units are to be regarded as standard.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


SDO ASTM: ASTM International
Document Number D4104
Publication Date Oct. 10, 1996
Language en - English
Page Count 4
Revision Level 96
Supercedes
Committee D18.21
Publish Date Document Id Type View
Nov. 1, 2017 D4104-17 Revision
Oct. 10, 1996 D4104-96 Revision
Aug. 1, 2010 D4104-96R10E01 Reaffirmation
Nov. 1, 2004 D4104-96R04 Reaffirmation