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WTAQ - A computer program for aquifer-test analysis of confined and unconfined aquifers

By:
and
DOI: 10.1061/40517(2000)366

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Abstract

Computer program WTAQ was developed to implement a Laplace-transform analytical solution for axial-symmetric flow to a partially penetrating, finite-diameter well in a homogeneous and anisotropic unconfined (water-table) aquifer. The solution accounts for wellbore storage and skin effects at the pumped well, delayed response at an observation well, and delayed or instantaneous drainage from the unsaturated zone. For the particular case of zero drainage from the unsaturated zone, the solution simplifies to that of axial-symmetric flow in a confined aquifer. WTAQ calculates theoretical time-drawdown curves for the pumped well and observation wells and piezometers. The theoretical curves are used with measured time-drawdown data to estimate hydraulic parameters of confined or unconfined aquifers by graphical type-curve methods or by automatic parameter-estimation methods. Parameters that can be estimated are horizontal and vertical hydraulic conductivity, specific storage, and specific yield. A sample application illustrates use of WTAQ for estimating hydraulic parameters of a hypothetical, unconfined aquifer by type-curve methods. Copyright ASCE 2004.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
WTAQ - A computer program for aquifer-test analysis of confined and unconfined aquifers
ISBN:
0784405174; 9780784405178
DOI:
10.1061/40517(2000)366
Volume
104
Year Published:
2004
Language:
English
Larger Work Title:
Joint Conference on Water Resource Engineering and Water Resources Planning and Management 2000: Building Partnerships
Conference Title:
Joint Conference on Water Resource Engineering and Water Resources Planning and Management 2000
Conference Location:
Minneapolis, MN
Conference Date:
30 July 2000 through 2 August 2000