Featured
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Progress Article |
Vulnerability of deep groundwater in the Bengal Aquifer System to contamination by arsenic
Arsenic levels in shallow groundwater in the Bengal Basin exceed thresholds for safe drinking water. Groundwater modelling indicates that deep wells that reach safe water below 150 m could remain safe for centuries if used for domestic water only, whereas the intensive use of deep groundwater for irrigation could contaminate this resource within decades.
- W. G. Burgess
- , M. A. Hoque
- & K. M. Ahmed
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Letter |
Long-term persistence of oil from the Exxon Valdez spill in two-layer beaches
Oil spilt from the tanker Exxon Valdez more than 20 years ago still persists in the gravel beaches of Prince William Sound, Alaska. Field data and numerical modelling indicate that some of the oil was trapped in the anoxic environment of the lower layers of the beaches when the water table was low.
- Hailong Li
- & Michel C. Boufadel
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News & Views |
Anthropogenic arsenic
Arsenic occurs naturally in the groundwater of southern Asia. Analyses of an agricultural site in Bangladesh suggest that human activities, including widespread farming practices, can dictate where elevated arsenic is found.
- Shawn Benner