Steady state flow with hydraulic conductivity change around large diameter wells

A. Altunkaynak*, Z. Şen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Darcian flow law in aquifers assumes that the aquifer hydraulic conductivity is constant and the groundwater movement is due only to the piezometric level changes through hydraulic gradient. In practice, after the well development the aquifer just around the well has comparatively larger hydraulic conductivity and gradient. Patchy aquifer solutions in the literature consider sudden hydraulic conductivity changes with distance for the steady state flow. The change of transmissivity is demonstrated by the application of slope-matching procedure to actual field data. It is the main purpose of this paper to derive simple analytical expressions for aquifer parameter evaluations with steadily decreasing hydraulic conductivity around the well. Spatial nonlinear hydraulic conductivity changes around a large-diameter well within the depression cone of a confined aquifer are considered as exponentially decreasing functions of the radial distance.

Original languageEnglish
Pages (from-to)1778-1783
Number of pages6
JournalHydrological Processes
Volume25
Issue number11
DOIs
Publication statusPublished - 30 May 2011

Keywords

  • Aquifer
  • Groundwater
  • Large diameter well
  • Nonlinear hydraulic conductivity
  • Transmissivity

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