Coastal Aquifer Salinity Evaluation

Version 1.1.0-2 - August 2004

CASE, Coastal Aquifer Salinisation Evaluation, is developed to demonstrate the response of the 'wedge' in a longitudinal section of an aquifer, when groundwater is pumped from confined aquifers and unconfined aquifers. Initially, drawdown at the end of the section, due to groundwater pumping is determined by analytical solutions developed by Theis (1935) for confined aquifers, Neuman (1972) for unconfined aquifers, and the principle of super position of solutions. The principle of super position allows the analytical solutions to solve for pumping from several wells, or pumping from a single well at varying discharge rate, or to estimate the rate of recovery, or a combination of any of these. Subsequently, an estimate of base flow is derived for the section for every time step, which is used as input to analytical solutions developed by Isaacs and Hunt (1986), to estimate the toe position of the salt water wedge.

The intended audiences of this tool are regional hydrogeologists, groundwater users and students in groundwater hydrology. CASE should be used for demonstration and educational purposes only.

System Requirements

Mac OS X, Linux, and Windows hosted computers with the Java Runtime
Environment (J2RE v1.4 or above) installed. JRE can be obtained
separately at (Note, JRE is pre-installed on Mac OS X


Concept: S.A. Prathapar
Funding: NSW DLWC (Austalia)
Programming & Artwork: Antigen