Transfer of Boron and Tritiated Water Through Sandstone1
- P. J. Wierenga,
- M. Th. van Genuchten and
- F. W. Boyle2
The movement of tritiated water and boron were determined during unsaturated flow through undisturbed sandstone cores. From the displacement and slope of the breakthrough curves relative to 1 pore volume of effluent, adsorption coefficients and dispersion coefficients were calculated of 0.135 and 1.06 cm2/day for boron, and 0.04 and 3.45 cm2/day for tritiated water, respectively. The data were used to predict the downward movement of boron through a sandstone formation in the Four Corners area of New Mexico. With 20 cm annual rainfall and 10% of the precipitation contributing to recharge, it was calculated to take 1,628 years for the boron concentration at the ground-water table at 86 m to reach one-half the boron concentration at the soil surface.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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