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Trends in arsenic concentration at tubewells in Bangladesh: conceptual models, numerical models, and monitoring proxies

Burgess, W, Ahmed, K, Carruthers, A, Cheetham, H, Cobbing, J, Cuthbert, Mark, Mather, S and McCarthy, E 2007. Trends in arsenic concentration at tubewells in Bangladesh: conceptual models, numerical models, and monitoring proxies. Trace Metals and other Contaminants in the Environment 9 , pp. 63-83. 10.1016/S0927-5215(06)09002-3

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Abstract

Groundwater across much of central and southern Bangladesh contains As at concentrations many times the World Health Organization recommended limit for drinking water, 10 μg/l. Approximately 70% of shallow hand-pumped tubewells (HTWs) comply with the Bangladesh national limit for drinking water, 50 μg/l. But will the As concentration in HTW discharge change with time? Attention is turning to the use of deeper tubewells (DTWs). Fewer than 1% of DTWs exceed the 50 μg/l As limit. For how long will DTWs remain As-safe? Prospects for sustainable development of groundwater either by shallow tubewells or by deep tubewells can only be judged by addressing the questions: will As concentration in tubewell discharge change with time; if so by how much, and how quickly? This chapter describes models developed to anticipate trends in As concentration at HTWs and DTWs in the alluvial aquifers, and assesses the field evidence for changing concentration over time.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Earth and Ocean Sciences
Last Modified: 01 Nov 2017 14:50
URI: http://orca.cf.ac.uk/id/eprint/105451

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