Anthony Knapton

Government of the Northern Territory

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Joanne Vanderzalm

Commonwealth Scientific and Industrial Research Organisation

Andrew Taylor

Commonwealth Scientific and Industrial Research Organisation

Cuan Petheram

CSIRO Land and Water

Chris Chilcott

CSIRO Land and Water

Dennis Gonzalez

Commonwealth Scientific and Industrial Research Organisation

Karen Barry

Commonwealth Scientific and Industrial Research Organisation

Peter Dillon

Commonwealth Scientific and Industrial Research Organisation

Nerida Horner

CSIRO Land and Water

Paul Pavelic

Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit

Declan Page

Commonwealth Scientific and Industrial Research Organisation

Cooperative Institutions

CSIRO Land and Water

Commonwealth Scientific and Industrial Research Organisation

National Centre for Groundwater Research and Training

Flinders University

South Australian Water Corporation

ACT Government

Weatherford College

Aix-Marseille Université

University of South Australia

Australian Water Quality Centre

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Finniss - Dundee and Cox Peninsula Water Resources Investigation 2002.

G. Humphreys Anthony Knapton Jerome Paiva

Peninsula

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Constraining spatial variability in recharge and discharge in an arid environment through modeling carbon‐14 with improved boundary conditions

Water Resources Research (2016)

Cameron Wood Peter G. Cook Glenn A. Harrington Anthony Knapton

Abstract Carbon‐14 ( 14 C) has been widely used to estimate groundwater recharge rates in arid regions, and is increasingly being used as a tool to assist numerical model calibration. However, lack of knowledge on 14 C inputs to groundwater potentially limits its reliability for constraining spatial variability in recharge. In this study, we use direct measurements of 14 C in the unsaturated zone to develop a 14 C input map for a regional scale unconfined aquifer in the Ti Tree Basin in central Australia. The map is used as a boundary condition for a 3‐D groundwater flow and solute transport model for the basin. The model is calibrated to both groundwater 14 C activity and groundwater level, and calibration is achieved by varying recharge rates in 18 hydrogeological zones. We test the sensitivity of the calibration to both the 14 C boundary condition, and the number or recharge zones used. The calibrated recharge rates help resolve the conceptual model for the basin, and demonstrate that spatially distributed discharge (through evapotranspiration) is an important part of the water balance. This approach demonstrates the importance of boundary conditions for 14 C transport modeling ( 14 C input activity), for improving estimates of spatial variability in recharge and discharge.

Groundwater model

Groundwater discharge

Water balance

10.1002/2015wr018424

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Artificial Storage and Recovery Project South Goulburn Island. Hydrogeological Investigations and Trial Storage and Recovery.

Anthony Knapton

Water storage

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Geophysics for karstic terrains

Anthony Knapton

Sinkhole

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Correction: Knapton, A.; et al. Managed Aquifer Recharge as a Strategic Storage and Urban Water Management Tool in Darwin, Northern Territory, Australia

Water (2020)

Anthony Knapton Declan Page Joanne Vanderzalm Dennis Gonzalez Karen Barry

The authors wish to make the following correction to this paper [...]

10.3390/w12061548

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Role of aquifer storage in water reuse

Desalination (2006)

Peter Dillon Paul Pavelic S. Toze Stéphanie Rinck-Pfeiffer R. Russell Martin

Reclaimed water

10.1016/j.desal.2005.04.109

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Managed Aquifer Recharge as a Strategic Storage and Urban Water Management Tool in Darwin, Northern Territory, Australia

Water (2019)

Anthony Knapton Declan Page Joanne Vanderzalm Dennis Gonzalez Karen Barry

Population growth and increased irrigation demand have caused a decline in groundwater levels that limit water supply in the Darwin rural area. Managed Aquifer Recharge (MAR) is a practical solution that can be adopted to augment stressed groundwater systems and subsequently increase the security of water supply. Aquifer storage capacity is considered to be the primary constraint to MAR where unconfined dolostone aquifers rapidly recharge during the tropical, wet season and drain again in the dry season. As a result, there is a general understanding that aquifers of this nature recharge to full capacity each wet season. However, the aquifer storage capacity and the potential for niche opportunities for MAR to alleviate declining groundwater levels has not previously been examined. This paper uses the Darwin rural area’s Proterozoic Koolpinyah Dolostone aquifer and the existing Koolpinyah Groundwater System to evaluate the prospects of MAR using both infiltration and injection techniques. Direct injection wells in an aquifer storage transfer and recovery (ASTR) scheme were favoured in this area, as injection wells occupy a smaller surface footprint than infiltration basins. This assessment suggested MAR during the early to mid-dry season could alleviate the impact of the dry season decline in groundwater levels in the Darwin rural area. The use of a larger aquifer storage and recovery (ASR) system (5,000,000 m3/year) was also assessed as a potentially viable technical solution in the northern part of the aquifer where it is understood to be confined. The ASR scheme could potentially be scaleable to augment the urban water system and provide strategic long-term storage. Consideration must also be given not only to the strategic positioning of the ASR water bank, but also to the hydrogeology of the aquifers in which the systems would be developed. Not all locations or aquifer systems can successfully support a strategic storage ASR system. Scheme-scale feasibility assessment of an ASR water bank is required. The study reported here is an early phase of a series of investigations that would typically be required to demonstrate the viability of any proposal to apply MAR to increase the reliability of conjunctive groundwater and surface water supplies in stressed water resources systems. It focusses on assessing suitable storage areas in a lateritic aquifer.

Infiltration (HVAC)

10.3390/w11091869

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Recharge sources and hydrogeochemical evolution of groundwater in alluvial basins in arid central Australia

Journal of Hydrology (2010)

Joanne Vanderzalm Ben M. Jeuken John D. H. Wischusen Paul Pavelic Corinne Le Gal La Salle

Throughflow

Depression-focused recharge

Groundwater model

10.1016/j.jhydrol.2010.11.035

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Citations (70)