Sequential aquifer tests at a well field, Montalto Uffugo Scalo, Italy

S. Straface, Tian-Chyi J Yeh, J. Zhu, S. Troisi, C. H. Lee

Research output: Contribution to journalArticle

88 Citations (Scopus)

Abstract

This paper investigates our ability to characterize an aquifer using a sequential aquifer test in a well field that consists of six wells. During the test, we pumped water out from the aquifer at one well and monitored the water level changes at the rest of the wells to obtain a set of five well hydrographs. By pumping at another of the six wells, we obtained another set of five hydrographs. This procedure was repeated until each of the six wells was pumped. We then analyzed the six sets of hydrographs using the classical drawdown-time, the drawdown-distance, and the drawdown-distance/time methods. Results of the analysis confirm recent findings that the transmissivity estimates vary significantly at early time and stabilize at late time. At late time, the estimated values from all hydrographs are similar overall but vary slightly according to the locations of the pumping and observation wells. In contrast, storage coefficient estimates stabilized rapidly to distinct values associated with the well locations. We subsequently used a hydraulic tomography approach to include all hydrographs from the sequential aquifer test to estimate the spatially varying transmissivity and storage coefficient fields. The estimated fields appear to be realistic: They reflect the geologic setting and the behaviors of the well hydrographs, although more definitive confirmation is needed.

Original languageEnglish (US)
Article numberW07432
JournalWater Resources Research
Volume43
Issue number7
DOIs
StatePublished - Jul 2007

Fingerprint

hydrograph
Aquifers
aquifers
Italy
aquifer
well
drawdown
testing
transmissivity
pumping
Water levels
Tomography
tomography
Hydraulics
test
Water
surface water level
fluid mechanics
water level
hydraulics

ASJC Scopus subject areas

  • Environmental Science(all)
  • Environmental Chemistry
  • Aquatic Science
  • Water Science and Technology

Cite this

Sequential aquifer tests at a well field, Montalto Uffugo Scalo, Italy. / Straface, S.; Yeh, Tian-Chyi J; Zhu, J.; Troisi, S.; Lee, C. H.

In: Water Resources Research, Vol. 43, No. 7, W07432, 07.2007.

Research output: Contribution to journalArticle

Straface, S. ; Yeh, Tian-Chyi J ; Zhu, J. ; Troisi, S. ; Lee, C. H. / Sequential aquifer tests at a well field, Montalto Uffugo Scalo, Italy. In: Water Resources Research. 2007 ; Vol. 43, No. 7.
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