ON METHODS OF DETERMINING SPECIFIC YIELD.

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

The discussion relies on a pumping test conducted recently by Nwankwor and coworkers from the University of Waterloo in an unconfined aquifer at Borden, Ontario, Canada. A water-balance method promulgated by these workers and used earlier by others is invalid because it overlooks a major component of the water budget. This method suggests erroneously that specific yield increase with time during a pumping test. It is shown that these specific yield values are consistent with water-balance considerations when all the components of the water budget are properly taken into account. Whereas the larger specific yields usually obtained from laborator drainage experiments may be well suited for the evaluation of ground-water reserves that can potentially be recovered from an unconfined aquifer over long periods of time, they are not directly relevant to the problem of relating ground-water level variations to pumpage which is characterized by a shorter time scale. Additional results are discussed.

Original languageEnglish (US)
Pages (from-to)679-684
Number of pages6
JournalGround Water
Volume25
Issue number6
StatePublished - Nov 1987

Fingerprint

water budget
unconfined aquifer
Aquifers
Water
Groundwater
pumping
groundwater
Water levels
Drainage
water level
drainage
timescale
method
experiment
Experiments
test

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)
  • Water Science and Technology

Cite this

ON METHODS OF DETERMINING SPECIFIC YIELD. / Neuman, Shlomo P.

In: Ground Water, Vol. 25, No. 6, 11.1987, p. 679-684.

Research output: Contribution to journalArticle

Neuman, Shlomo P. / ON METHODS OF DETERMINING SPECIFIC YIELD. In: Ground Water. 1987 ; Vol. 25, No. 6. pp. 679-684.
@article{a975580f8dca4d9fba94654e3092dbd9,
title = "ON METHODS OF DETERMINING SPECIFIC YIELD.",
abstract = "The discussion relies on a pumping test conducted recently by Nwankwor and coworkers from the University of Waterloo in an unconfined aquifer at Borden, Ontario, Canada. A water-balance method promulgated by these workers and used earlier by others is invalid because it overlooks a major component of the water budget. This method suggests erroneously that specific yield increase with time during a pumping test. It is shown that these specific yield values are consistent with water-balance considerations when all the components of the water budget are properly taken into account. Whereas the larger specific yields usually obtained from laborator drainage experiments may be well suited for the evaluation of ground-water reserves that can potentially be recovered from an unconfined aquifer over long periods of time, they are not directly relevant to the problem of relating ground-water level variations to pumpage which is characterized by a shorter time scale. Additional results are discussed.",
author = "Neuman, {Shlomo P}",
year = "1987",
month = "11",
language = "English (US)",
volume = "25",
pages = "679--684",
journal = "Ground Water",
issn = "0017-467X",
publisher = "Wiley-Blackwell",
number = "6",

}

TY - JOUR

T1 - ON METHODS OF DETERMINING SPECIFIC YIELD.

AU - Neuman, Shlomo P

PY - 1987/11

Y1 - 1987/11

N2 - The discussion relies on a pumping test conducted recently by Nwankwor and coworkers from the University of Waterloo in an unconfined aquifer at Borden, Ontario, Canada. A water-balance method promulgated by these workers and used earlier by others is invalid because it overlooks a major component of the water budget. This method suggests erroneously that specific yield increase with time during a pumping test. It is shown that these specific yield values are consistent with water-balance considerations when all the components of the water budget are properly taken into account. Whereas the larger specific yields usually obtained from laborator drainage experiments may be well suited for the evaluation of ground-water reserves that can potentially be recovered from an unconfined aquifer over long periods of time, they are not directly relevant to the problem of relating ground-water level variations to pumpage which is characterized by a shorter time scale. Additional results are discussed.

AB - The discussion relies on a pumping test conducted recently by Nwankwor and coworkers from the University of Waterloo in an unconfined aquifer at Borden, Ontario, Canada. A water-balance method promulgated by these workers and used earlier by others is invalid because it overlooks a major component of the water budget. This method suggests erroneously that specific yield increase with time during a pumping test. It is shown that these specific yield values are consistent with water-balance considerations when all the components of the water budget are properly taken into account. Whereas the larger specific yields usually obtained from laborator drainage experiments may be well suited for the evaluation of ground-water reserves that can potentially be recovered from an unconfined aquifer over long periods of time, they are not directly relevant to the problem of relating ground-water level variations to pumpage which is characterized by a shorter time scale. Additional results are discussed.

UR - http://www.scopus.com/inward/record.url?scp=0023524977&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0023524977&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0023524977

VL - 25

SP - 679

EP - 684

JO - Ground Water

JF - Ground Water

SN - 0017-467X

IS - 6

ER -