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University of Western Australia (2014)

Influence of conceptual model uncertainty on recharge processes for the Wallal Aquifer System in the West Canning Basin, Western Australia

Hanna Jonathan Phillip

Titre : Influence of conceptual model uncertainty on recharge processes for the Wallal Aquifer System in the West Canning Basin, Western Australia

Auteur : Hanna Jonathan Phillip

Université de soutenance : University of Western Australia

Grade : Master’s Thesis 2014

Résumé
The Wallal Aquifer System (WAS) is a predominantly confined aquifer in the West Canning Basin (WCB), Western Australia. It is located 150 km east of Port Hedland and is a major water supply for the Pilbara region. There have been several water supply assessments carried out in the WCB ; none however challenge the underlying hydrogeological conceptualisation that was developed in the 1970s. The aim of this investigation is to challenge the prevailing hydrogeological conceptualisation, particularly assessing recharge potential from the immediate south of the study area. 3-D geological modelling was used to create multiple realisations of the stratigraphy using a range of possible depositional and post depositional processes. Multiple methods for recharge estimation were used in the investigation due to the inherent uncertainty with each method, particularly in arid environments.

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