Age and provenance of groundwater in a shallow arsenic-affected aquifer in the Lower Mekong Basin, Kandal Province, Cambodia

Richards, Laura A. and Sültenfuß, Jurgen and Magnone, Daniel and Boyce, Adrian and Sovann, Pheaktra and Casanueva-Marenco, Maria Jose and Ballentine, Christopher J. and Van Dongen, Bart E. and Polya, David A. (2016) Age and provenance of groundwater in a shallow arsenic-affected aquifer in the Lower Mekong Basin, Kandal Province, Cambodia. Arsenic Research and Global Sustainability . pp. 74-75. ISSN .

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Abstract

Arsenic contamination of groundwaters in South/Southeast Asia is a major threat to public health. Understanding
the source and age of the groundwaters is critically important to understanding the controls on arsenic mobilization in these aquifers. Utilizing a suite of isotopic tracers, we have determined various site-specific recharge mechanisms, and estimated recharge source contributions. Tritium-helium age determinations show that the groundwater in this area is modern, indicating relatively fast recharge even in the absence of large-scale groundwater abstraction. The relationship between apparent age and depth indicates a strong vertical control on hydrology, which may influence preferential flow paths and ultimately arsenic release in these aquifers.

Additional Information:Proceedings of the Sixth International Congress on Arsenic in the Environment (As2016), June 19-23, 2016, Stockholm, Sweden
Keywords:arsenic, groundwater, tritium, groundwater age, NotOAChecked
Subjects:F Physical Sciences > F140 Environmental Chemistry
F Physical Sciences > F850 Environmental Sciences
F Physical Sciences > F852 Hydrology
Divisions:College of Science > School of Geography
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ID Code:28123
Deposited On:04 Aug 2017 10:41

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