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Research by scientists affiliated with the Earth Institute at Columbia University

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ARSENIC VARIATION OVER TIME IN BANGLADESH AQUIFERS
A team of Earth Institute researchers has been looking at the geology of shallow aquifers in Bangladesh as part of a five-year study aimed at preventing people in rural Bangladesh from suffering as a result of ingesting arsenic in their well water. Tens of millions of people in South Asia are affected by this problem. The spatial variation of arsenic in the Bangladesh study area has been fairly well understood (it varies even within small areas), but the current study addresses variation from single sources over time. The study site consisted of six nests of monitoring wells installed in an area where the hydrology and geochemistry had been carefully studied The study shows that the wells studied did not display any discernable arsenic pattern linked to seasonal water table fluctuations. This suggests that once an aquifer is found to be safe for drinking, it will stay safe throughout the year. R.K. Dhar with Martin Stute, Adjunct Research Scientist, LDEO martins@ldeo.columbia.edu 845-365-8704.


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Contact: Mary Tobin
mtobin@ldeo.columbia.edu
845-365-8607
The Earth Institute at Columbia University
13-Dec-2004


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