Your search found 5 records
1 Jacks, G.; Bhattacharya, P.; Ahmed, K. M.; Chatterjee, D. 2000. Arsenic in groundwater and redox conditions in the Bengal delta: Possible in situ remediation. In Mehrotra, R.; Soni, B.; Bhatia, K. K. S. (Eds.), Integrated water resources management for sustainable development - Volume 1. Roorkee, India: National Institute of Hydrology. pp.413-418.
Groundwater ; Water quality ; Water pollution ; Aquifers ; Artificial recharge ; Rice ; Paddy fields ; Soil water ; Nitrogen / India / Bengal Delta / Nadia District
(Location: IWMI-HQ Call no: 333.91 G000 MEH Record No: H028065)
2 Burgess, W.; Ahmed, K. M.. 2006. Arsenic in aquifers of the Bengal Basin: From sediment source to tube-wells used for domestic water supply and irrigation. In Naidu, R.; Smith, E.; Owens, G.; Bhattacharya, P.; Nadebaum, P. (Eds.), Managing arsenic in the environment: From soil to human health. Collingwood, Australia: CSIRO. pp.31-56.
Arsenic ; Aquifers ; Groundwater management ; Public health ; Risks ; Water pollution ; Tube wells ; Pumping ; Water supply ; Domestic water ; Irrigation water ; Models / India / Bangladesh / West Bengal / Bengal Basin
(Location: IWMI-HQ Call no: 615.925715 G000 NAI Record No: H038356)
3 Bennear, L.; Tarozzi, A.; Pfaff, A.; Balasubramanya, Soumya; Ahmed, K. M.; van Geen, A. 2013. Impact of a randomized controlled trial in arsenic risk communication on household water-source choices in Bangladesh. Journal of Environmental Economics and Management, 65(2):225–240. [doi: https://doi.org/10.1016/j.jeem.2012.07.006]
Drinking water ; Groundwater ; Wells ; Arsenic ; Health hazards ; Households ; Models / Bangladesh / Araihazar Upazila
(Location: IWMI HQ Call no: e-copy only Record No: H045010)
(1.73 MB)
We conducted a randomized controlled trial in rural Bangladesh to examine how household drinking-water choices were affected by two different messages about risk from naturally occurring groundwater arsenic. Households in both randomized treatment arms were informed about the arsenic level in their well and whether that level was above or below the Bangladesh standard for arsenic. Households in one group of villages were encouraged to seek water from wells below the national standard. Households in the second group of villages received additional information explaining that lower-arsenic well water is always safer and these households were encouraged to seek water from wells with lower levels of arsenic, irrespective of the national standard. A simple model of household drinking-water choice indicates that the effect of the emphasis message is theoretically ambiguous. Empirically, we find that the richer message had a negative, but insignificant, effect on well-switching rates, but the estimates are sufficiently precise that we can rule out large positive effects. The main policy implication of this finding is that a one-time oral message conveying richer information on arsenic risks, while inexpensive and easily scalable, is unlikely to be successful in reducing exposure relative to the status-quo policy.
4 Balasubramanya, Soumya; Pfaff, A.; Bennear, L.; Tarozzi, A.; Ahmed, K. M.; Schoenfeld, A.; Van Geen, A. 2014. Evolution of households’ responses to the groundwater arsenic crisis in Bangladesh: information on environmental health risks can have increasing behavioral impact over time. Environment and Development Economics, 19:631-647. [doi: https://doi.org/10.1017/S1355770X13000612]
Arsenic ; Groundwater ; Environmental health ; Health hazards ; Households ; Wells ; Drinking water / Bangladesh / Araihazar Upazila
(Location: IWMI HQ Call no: e-copy only Record No: H046376)
(0.31 MB)
A national campaign of well testing through 2003 enabled households in rural Bangladesh to switch, at least for drinking water, from high-arsenic wells to neighboring lower arsenic wells. We study the well-switching dynamics over time by re-interviewing, in 2008, a randomly selected subset of households in the Araihazar region who had been interviewed in 2005. Contrary to concerns that the impact of arsenic information on switching behavior would erode over time, we find that not only was 2003–2005 switching highly persistent but also new switching by 2008 doubled the share of households at unsafe wells who had switched. The passage of time also had a cost: 22 per cent of households did not recall test results by 2008. The loss of arsenic knowledge led to staying at unsafe wells and switching from safe wells. Our results support ongoing well testing for arsenic to reinforce this beneficial information.
5 Knappett, P. S. K.; Mailloux, B. J.; Choudhury, I.; Khan, M. R.; Michael, H. A.; Barua, S.; Mondal, D. R.; Steckler, M. S.; Akhter, S. H.; Ahmed, K. M.; Bostick, B.; Harvey, C. F.; Shamsudduha, M.; Shuai, P.; Mihajlov, I.; Mozumder, R.; van Geen, A. 2016. Vulnerability of low-arsenic aquifers to municipal pumping in Bangladesh. Journal of Hydrology, 539:674-686. [doi: https://doi.org/10.1016/j.jhydrol.2016.05.035]
Groundwater ; Aquifers ; Recharge ; Arsenic ; Contamination ; Drinking water ; Pumping ; Water levels ; Hydraulics ; Hydrogeology ; Models ; Urban areas ; Communities ; Wells ; Rivers ; Deltas / Bangladesh / Dhaka / Araihazar
(Location: IWMI HQ Call no: e-copy only Record No: H047769)
(4.05 MB)
Sandy aquifers deposited >12,000 years ago, some as shallow as 30 m, have provided a reliable supply of low-arsenic (As) drinking water in rural Bangladesh. This study concerns the potential risk of contaminating these aquifers in areas surrounding the city of Dhaka where hydraulic heads in aquifers >150 m deep have dropped by 70 m in a few decades due to municipal pumping. Water levels measured continuously from 2012 to 2014 in 12 deep (>150 m), 3 intermediate (90–150 m) and 6 shallow (<90 m) community wells, 1 shallow private well, and 1 river piezometer show that the resulting drawdown cone extends 15–35 km east of Dhaka. Water levels in 4 low-As community wells within the 62–147 m depth range closest to Dhaka were inaccessible by suction for up to a third of the year. Lateral hydraulic gradients in the deep aquifer system ranged from 1.7 104 to 3.7 104 indicating flow towards Dhaka throughout 2012–2014. Vertical recharge on the edge of the drawdown cone was estimated at 0.21 ± 0.06 m/yr. The data suggest that continued municipal pumping in Dhaka could eventually contaminate some relatively shallow community wells.
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