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Steady state flow with hydraulic conductivity change around large diameter wells
Author(s) -
Altunkaynak A.,
Şen Z.
Publication year - 2010
Publication title -
hydrological processes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.222
H-Index - 161
eISSN - 1099-1085
pISSN - 0885-6087
DOI - 10.1002/hyp.7935
Subject(s) - hydraulic conductivity , aquifer , slug test , geology , hydraulic head , groundwater flow , cone of depression , steady state (chemistry) , groundwater model , groundwater , flow (mathematics) , groundwater flow equation , aquifer test , soil science , geotechnical engineering , hydrology (agriculture) , mechanics , groundwater recharge , physics , soil water , chemistry
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. Copyright © 2010 John Wiley & Sons, Ltd.