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Groundwater age dating using tritium

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As a result, the apparent age of groundwater in the study area is in the range of 38–48 years.

The land use was the paddy field about 30 years ago and it has been redeveloped to a wetland park since then.

Atmospheric atomic bomb testing in the 1950's and 60's bolstered the concentration of tritium in the atmosphere where it can become incorporated into a water molecule and enter the water cycle.

During precipitation events this tritiated water enters groundwater and can be used as a dating tool for recharge.

Wetlands are typically highly productive ecosystems with soils containing high levels of labile organic matter (Kadlec and Wallace ).

When groundwater moves through wetlands, aerobic condition in shallow groundwater could easily become anoxic condition because of the consumption of the available oxygen during decomposition processes (Seitzinger ).