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ASTM D5881-95(2000)

Historical Revision

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

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1.1 This test method covers determination of transmissivity from the measurement of water-level response to a sudden change of water level in a well-aquifer system characterized as being critically damped or in the transition range from underdamped to overdamped. Underdamped response is characterized by oscillatory changes in water level; overdamped response is characterized by return of the water level to the initial static level in an approximately exponential manner. Overdamped response is covered in Guide D4043; underdamped response is covered in D5785.

1.2 The analytical procedure in this test method is used in conjunction with Guide D4043 and the field procedure in Test Method D4044 for collection of test data.

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

1.4 Limitations--Slug tests are considered to provide an estimate of the transmissivity of an aquifer near the well screen. The method is applicable for systems in which the damping parameter, [zeta], is within the range from 0.2 through 5.0. The assumptions of the method prescribe a fully penetrating well (a well open through the full thickness of the aquifer) in a confined, nonleaky aquifer.

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 D5881
Publication Date Jan. 1, 2000
Language en - English
Page Count 9
Revision Level 95(2000)
Supercedes
Committee D18.21
Publish Date Document Id Type View
June 1, 2020 D5881-20 Revision
Dec. 1, 2018 D5881-18 Revision
Nov. 15, 2013 D5881-13 Revision
Jan. 1, 2000 D5881-95R00 Revision
Nov. 1, 2005 D5881-95R05 Reaffirmation