Tracing temporal variability of groundwater fluxes in tidal wetlands using radon isotopes and electrical conductivity

Poh, Seng-Chee, Gasparon, Massimo and Lockington, David (2010). Tracing temporal variability of groundwater fluxes in tidal wetlands using radon isotopes and electrical conductivity. In: Groundwater 2010: The Challenge of Sustainable Management, Canberra, ACT, Australia, (). 31 October-4 November 2010.

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Name Description MIMEType Size Downloads
Author Poh, Seng-Chee
Gasparon, Massimo
Lockington, David
Title of paper Tracing temporal variability of groundwater fluxes in tidal wetlands using radon isotopes and electrical conductivity
Conference name Groundwater 2010: The Challenge of Sustainable Management
Conference location Canberra, ACT, Australia
Conference dates 31 October-4 November 2010
Convener International Association of Hydrogeologists (IAH); Geological Society of Australia (GSA)
Place of Publication Canberra, ACT, Australia
Publisher Geological Society of Australia
Publication Year 2010
Sub-type Published abstract
Collection year 2011
Language eng
Formatted Abstract/Summary
Electrical conductivity and the levels of 222Rn were measured in the Tinchi Tamba Wetlands Reserve (TTWR) of Moreton Bay, south-east Queensland, to characterise the wetlands‘ water fluxes. The concept of using 222Rn as water tracer is based on its unreactive nature and on the fact that surface waters typically have a low 222Rn content, while waters that have been in contact with uranium-bearing minerals have elevated 222Rn levels. Therefore 222Rn, having a very short half-life (t1/2 = 3.8 days), is typically highly concentrated in groundwater compared with surface water. Radon is a very volatile element, and specific methods and preservation procedures and techniques are required for its analysis. For this study, 222Rn and salinity (measured as electrical conductivity) were measured in waters obtained from two monitoring wells, to test whether this tracer is sufficiently sensitive to detect changes in groundwater sources over a tidal cycle.
Subjects 040202 Inorganic Geochemistry
040603 Hydrogeology
960903 Coastal and Estuarine Water Management
Q-Index Code EX
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Presented during Concurrent Session 3G "Challenges and Threats to groundwater management", Topic: "Groundwater in the Coastal Zone".

 
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Created: Mon, 21 Mar 2011, 12:53:40 EST by Ashleigh Paroz on behalf of School of Earth Sciences