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Abstract

Summary

Estimating groundwater storage volumes is important for assessing the potential capacity and recovery efficiencies of Managed Aquifer Recharge (MAR) strategies. However such volume estimates are vexed by poor characterisation of factors such as the effective porosity of the aquifer. These issues were faced by the Broken Hill Managed Aquifer Recharge (BHMAR) project which aimed to define key groundwater resources and aquifer storage options in the lower Darling River floodplain of western New South Wales, Australia. The aim of this study is to determine if the NMR free-water data depicts the effective porosity of the sediment and could be used in a workflow to estimate groundwater storage volumes in the target aquifer. 26 sonic drilled bores were logged using the Vista Clara Javelin system. An investigation ensued to validate these NMR results. This included examination of the NMR data processing parameters and optimal regularization factor, additional matric potential and gravimetric water experiments to determine the fractional water and total porosities of sediment. The laboratory experiments showed comparable results to the NMR free-water and total water for sand and muddy sand, but the NMR underestimated the total water in mud.

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/content/papers/10.3997/2214-4609.201413697
2015-09-06
2024-04-18

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References

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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201413697
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Using Borehole NMR Data to Determine the Effective Porosity of Sediment for Groundwater Resource Estimation, Australia
Conference Proceedings 2015, 1 (2015); https://doi.org/10.3997/2214-4609.201413697
/content/papers/10.3997/2214-4609.201413697
/content/papers/10.3997/2214-4609.201413697
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