Articles | Volume 23, issue 3
Research article
08 Mar 2019
Research article |  | 08 Mar 2019

A general analytical model for head response to oscillatory pumping in unconfined aquifers: effects of delayed gravity drainage and initial condition

Ching-Sheng Huang, Ya-Hsin Tsai, Hund-Der Yeh, and Tao Yang


Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish as is (27 Feb 2019) by Graham Fogg
AR by Hund-Der Yeh on behalf of the Authors (27 Feb 2019)  Author's response    Manuscript
Short summary
The study develops a new model describing head fluctuation induced by oscillatory pumping test (OPT) in an unconfined aquifer with effects of delayed gravity drainage (DGD) and initial condition regarding the hydraulic head prior to OPT. The DGD reduces to instantaneous gravity drainage when a dimensionless parameter exceeds 500. A pseudo-steady-state model excluding initial condition causes a time-shift from the actual transient model in predicting simple harmonic motion of head fluctuation.