Aquitard effect on drawdown in water table aquifers Academic Article

abstract

• The effects of an aquitard on drawdown in an overlying unconfined aquifer can be represented by a drainage-type term at the aquitard-aquifer interface. The functional form of this boundary condition is similar to the Boulton-Neuman boundary condition used for water table aquifers except the kernel contains an inverse square root of time instead of a negative exponential. Type curves using the new boundary condition were obtained in semianalytical form. Examples for several representative conditions show that the effect of the underlying aquitard can contribute to the type curve at early and intermediate times, but the effect becomes negligible at late times. Copyright 2005 by the American Geophysical Union.

authors

• Zhan, Hongbin

author list (cited authors)

• Zlotnik, V. A., & Zhan, H.

citation count

• 14

publication date

• June 2005

publisher

• American Geophysical Union (AGU)  Publisher

published in

• WATER RESOUR. RES.  Journal

Digital Object Identifier (DOI)

• 10.1029/2004wr003716

start page

• 1

end page

• 6

volume

• 41

issue

• 6