Arsenic mobilisation in a new well field for drinking water production along the Red River, Nam Du, Hanoi

Norrman, Jenny; Sparrenbom, Charlotte; Berg, Michael; Nhan, Dang Duc; Nhân, Phạm Quý; Rosqvist, Håkan; Jacks, Gunnar; Sigvardsson, Emma; Baric, David; Moreskog, Johanna; Harms-Ringdahl, Peter; Hoan, Nguyen Van

doi:10.1016/j.apgeochem.2008.06.016

Cited by 42 publications

(36 citation statements)

References 31 publications

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“…1) are highly seasonal as a result of intensive precipitation during the annual monsoon (Klump et al, 2006;Mukherjee et al, 2007;Larsen et al, 2008;Norrman et al, 2008;Berg et al, 2008). Seasonal fluctuations vary considerably both at spatial and temporal scales and range from 2-8 m in the Ganges-Brahmaputra-Meghna (GBM) Delta (BGS and DPHE, 2001), 2-5 m in the Red River Basin (Norrman et al, 2008), 2-8 m in the Mekong Basin (Benner et al, 2008;Berg et al, 2008), and 1-5 m in the Chao Phraya Basin (Suwanlert, 2004). Groundwater abstraction for dry-season irrigation which has taken place since 1970s in the GBM Delta (WARPO, 2000) and more recently in the Irrawaddy Basin and Mekong Delta (Dawe, 2005;FAO, 2006), serves to increase seasonality in shallow groundwater levels.…”

Section: Introductionmentioning

confidence: 99%

The analysis of groundwater table variations in Sylhet region, Bangladesh

Zafor

Alam

Rahman

et al. 2017

Environmental Engineering Research

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Abstract. Groundwater levels in shallow aquifers underlying Asian mega-deltas are characterized by strong seasonal variations associated with monsoon rainfall. To resolve trend and seasonal components in weekly groundwater levels in the Ganges-Brahmaputra-Meghna (GBM) Delta, we apply a nonparametric seasonal-trend decomposition procedure (STL) to observations compiled from 1985-2005 in Bangladesh. Seasonality dominates observed variance in groundwater levels but declining groundwater levels (>1 m/yr) are detected in urban and peri-urban areas around Dhaka as well as in north-central, northwestern, and southwestern parts of the country (0.1-0.5 m/yr) where intensive abstraction of groundwater is conducted for dry-season rice cultivation. Rising groundwater levels (0.5-2.5 cm/yr) are observed in the estuarine and southern coastal regions. This novel application of the STL procedure reveals, for the first time, the unsustainability of irrigation supplied by shallow aquifers in some areas (e.g., High Barind Tract) of the GBM Delta and the hydrological impact of potential seawater intrusion of coastal aquifers associated with sea-level rise. Our findings provide important insight into the hydrological impacts of groundwater-fed irrigation and sea-level rise in other Asian mega-deltas where monitoring data are limited.

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Section: Introductionmentioning

confidence: 99%

The analysis of groundwater table variations in Sylhet region, Bangladesh

Zafor

Alam

Rahman

et al. 2017

Environmental Engineering Research

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“…Since then, regional groundwater studies have been carried out in the vicinity of Hanoi city (10-30 km distance), on the banks of the Red River and its adjacent floodplains (5,(10)(11)(12)(13)(14), and along a 45 km transect across the southern and central part of the delta (15). High As levels were found in both the Holocene and Pleistocene aquifers (3,5,10,13). Private wells predominantly extract water from the Holocene aquifers, whereas wells of urban treatment facilities tap Pleistocene aquifers (3).…”

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confidence: 99%

Arsenic pollution of groundwater in Vietnam exacerbated by deep aquifer exploitation for more than a century

Winkel

Trang

Lan

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

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Arsenic contamination of shallow groundwater is among the biggest health threats in the developing world. Targeting uncontaminated deep aquifers is a popular mitigation option although its long-term impact remains unknown. Here we present the alarming results of a large-scale groundwater survey covering the entire Red River Delta and a unique probability model based on three-dimensional Quaternary geology. Our unprecedented dataset reveals that ∼7 million delta inhabitants use groundwater contaminated with toxic elements, including manganese, selenium, and barium. Depth-resolved probabilities and arsenic concentrations indicate drawdown of arsenic-enriched waters from Holocene aquifers to naturally uncontaminated Pleistocene aquifers as a result of >100 years of groundwater abstraction. Vertical arsenic migration induced by large-scale pumping from deep aquifers has been discussed to occur elsewhere, but has never been shown to occur at the scale seen here. The present situation in the Red River Delta is a warning for other As-affected regions where groundwater is extensively pumped from uncontaminated aquifers underlying high arsenic aquifers or zones.three-dimensional risk modeling | anthropogenic influence | drinking water resources | geogenic contamination | health threat

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“…Between 2000 and 2010, average daily water consumption in Vietnam increased from 881,100 to 1,079,350 m 3 (Moglia et al 2012). Rapid industrialization and economic growth have led to a massive population shift from the countryside to the cities, creating increased strain on natural resources and the environment (Norrman et al 2008). The primary sources of water pollution are untreated municipal and industrial wastewater (Chau et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Remarks on the current quality of groundwater in Vietnam

Luu

2017

Environ Sci Pollut Res

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This paper reviews the current quality of groundwater in Vietnam. In Vietnam, groundwater is obtained primarily from tubewells, which have high concentrations of pollutants such as As, Fe, Mn, and NH 4 + . In the areas where groundwater tests were conducted, arsenic levels ranged from 0.1-3050 μg/L, which substantially exceed the standard of 10 μg/L which has been established by the WHO. Contamination sources are distributed over a large area from the Red River Delta in the north to the Mekong River Delta in the south, putting as many as ten million people at risk of adverse health effects. Levels of arsenic and iron in sediment are strongly correlated, which indicate that the presence of arsenic in groundwater results from the reduction of arsenic bound to iron oxyhydroxides. It is important to raise awareness of these issues among the Vietnamese public by disseminating information about the negative effects of contaminated drinking water, as well as carrying out long-term research projects to identify other sources of contamination and improving water treatment technology and water management capabilities.

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Arsenic mobilisation in a new well field for drinking water production along the Red River, Nam Du, Hanoi

Cited by 42 publications

References 31 publications

The analysis of groundwater table variations in Sylhet region, Bangladesh

The analysis of groundwater table variations in Sylhet region, Bangladesh

Arsenic pollution of groundwater in Vietnam exacerbated by deep aquifer exploitation for more than a century

Remarks on the current quality of groundwater in Vietnam

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