Groundwater balance research to improve the accuracy of drawdown predictions in the Surat Basin, Queensland

Reading, Lucy, Keir, Greg, McIntyre, Neil, & Larson, Josh (2015) Groundwater balance research to improve the accuracy of drawdown predictions in the Surat Basin, Queensland. In AAPG Conference: Opportunities and Advancements in Coalbed Methane in the Asia-Pacific, 12-13 February 2015, Brisbane, Australia. (Unpublished)

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Abstract

Groundwater modelling studies rely on an accurate determination of inputs and outputs that make up the water balance. Often there is large uncertainty associated with estimates of recharge and unmetered groundwater use. This can translate to equivalent uncertainty in the forecasting of sustainable yields, impacts of extraction, and susceptibility of groundwater dependent ecosystems. In the case of Coal Seam Gas, it is important to characterise the temporal and special distribution of depressurisation in the reservoir and how this may or may not extend to the adjacent aquifers.

A regional groundwater flow model has been developed by the Queensland Government to predict drawdown impacts due to Coal Seam Gas activities in the Surat basin. This groundwater model is undergoing continued refinement and there is currently scope to address some of the key areas of uncertainty including better quantification of groundwater recharge and unmetered groundwater extractions. Research is currently underway to improve the accuracy of estimates of both of these components of the groundwater balance in order to reduce uncertainty in predicted groundwater drawdowns due to CSG activities.

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ID Code: 87040
Item Type: Conference Paper
Refereed: Yes
Divisions: Current > Schools > School of Earth, Environmental & Biological Sciences
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 [please consult the authors]
Deposited On: 31 Aug 2015 02:53
Last Modified: 31 Aug 2015 02:53

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