scholarly journals Groundwater arsenic content related to the sedimentology and stratigraphy of the Red River delta, Vietnam

2021 ◽  
pp. 152641
Author(s):  
Jolanta Kazmierczak ◽  
Dieke Postma ◽  
Trung Dang ◽  
Hoan Van Hoang ◽  
Flemming Larsen ◽  
...  
Keyword(s):  
River Delta ◽  
Red River ◽  
Arsenic Content ◽  
Red River Delta ◽  
Groundwater Arsenic

scholarly journals The controlling of paleo-riverbed migration on Arsenic mobilization in groundwater in the Red River Delta, Vietnam

2020 ◽  
Vol 42 (2) ◽  
pp. 161-175
Author(s):  
Dang Tran Trung ◽  
Nguyen Thi Nhan ◽  
Than Van Don ◽  
Nguyen Kim Hung ◽  
Jolanta Kazmierczak ◽  
...  
Keyword(s):  
Groundwater Modeling ◽  
Arsenic Concentration ◽  
River Delta ◽  
Red River ◽  
Arsenic Content ◽  
Red River Delta ◽  
Arsenic Mobilization ◽  
Reducing Conditions ◽  
Arsenic In Groundwater ◽  
Combination Of Methods

In the Red River Delta, the concentrations of Arsenic in groundwater of alluvial dominated systems are very high, exceeding the WHO’s permissible. The correlation between the Arsenic concentrations in groundwater and the age of Holocene sediment as a key controlling groundwater Arsenic concentration in the Red River delta has been investigated. The evolution of sediments in the Holocene is closely related to paleo-riverbed migration in the past. A combination of methods is implemented including remote sensing, multi-electrode profiling (MEP), gamma-logging, drilling, soil sample and groundwater modeling. The resul has identified the shape, sediment compositions and location of the six paleo-riverbed periods. The age of the paleo-riverbed is determined by drilling, soil sampling and optically stimulated luminescence (OSL) in the laboratory. The oldest sediments is 5.9±0.4 ka BP in Phung Thuong near the mountain, the youngest one is from 0.4÷0.6 ka BP in H-transect near the Red River and the rest of the other is around 3.5 ka BP. The modeling results by using MODFLOW and MT3D show that the dynamics of paleo-riverbeds controlling Arsenic mobilization in groundwater in the Red River Delta. When the river moved to another position, the current river position at that time was filled with younger sediments and became paleo-riverbed formation with reducing conditions, Arsenic content which was adsorbed in the previous stage then released into groundwater. Therefore, Arsenic concentration in groundwater of young Holocene sediments is higher than in older ones which elucidates that paleo-riverbed migration controls on Arsenic mobilization in groundwater in the study area.

scholarly journals Spatial and temporal evolution of groundwater arsenic contamination in the Red River delta, Vietnam: Interplay of mobilisation and retardation processes

2020 ◽  
Vol 717 ◽  
pp. 137143 ◽  
Author(s):  
Emiliano Stopelli ◽  
Vu T. Duyen ◽  
Tran T. Mai ◽  
Pham T.K. Trang ◽  
Pham H. Viet ◽  
...  
Keyword(s):  
Temporal Evolution ◽  
Arsenic Contamination ◽  
River Delta ◽  
Red River ◽  
Red River Delta ◽  
Groundwater Arsenic

Geochemical processes underlying a sharp contrast in groundwater arsenic concentrations in a village on the Red River delta, Vietnam

2008 ◽  
Vol 23 (11) ◽  
pp. 3143-3154 ◽  
Author(s):  
Elisabeth Eiche ◽  
Thomas Neumann ◽  
Michael Berg ◽  
Beth Weinman ◽  
Alexander van Geen ◽  
...  
Keyword(s):  
River Delta ◽  
Sharp Contrast ◽  
Red River ◽  
Geochemical Processes ◽  
Red River Delta ◽  
Groundwater Arsenic

scholarly journals The controlling of paleo-riverbed migration on Arsenic mobilization in groundwater in the Red River Delta, Vietnam

2020 ◽  
Vol 42 (2) ◽  
pp. 161-175
Author(s):  
Dang Tran Trung ◽  
Nguyen Thi Nhan ◽  
Than Van Don ◽  
Nguyen Kim Hung ◽  
Jolanta Kazmierczak ◽  
...  
Keyword(s):  
Groundwater Modeling ◽  
Arsenic Concentration ◽  
River Delta ◽  
Red River ◽  
Arsenic Content ◽  
Red River Delta ◽  
Arsenic Mobilization ◽  
Reducing Conditions ◽  
Arsenic In Groundwater ◽  
Combination Of Methods

In the Red River Delta, the concentrations of Arsenic in groundwater of alluvial dominated systems are very high, exceeding the WHO’s permissible. The correlation between the Arsenic concentrations in groundwater and the age of Holocene sediment as a key controlling groundwater Arsenic concentration in the Red River delta has been investigated. The evolution of sediments in the Holocene is closely related to paleo-riverbed migration in the past. A combination of methods is implemented including remote sensing, multi-electrode profiling (MEP), gamma-logging, drilling, soil sample and groundwater modeling. The resul has identified the shape, sediment compositions and location of the six paleo-riverbed periods. The age of the paleo-riverbed is determined by drilling, soil sampling and optically stimulated luminescence (OSL) in the laboratory. The oldest sediments is 5.9±0.4 ka BP in Phung Thuong near the mountain, the youngest one is from 0.4÷0.6 ka BP in H-transect near the Red River and the rest of the other is around 3.5 ka BP. The modeling results by using MODFLOW and MT3D show that the dynamics of paleo-riverbeds controlling Arsenic mobilization in groundwater in the Red River Delta. When the river moved to another position, the current river position at that time was filled with younger sediments and became paleo-riverbed formation with reducing conditions, Arsenic content which was adsorbed in the previous stage then released into groundwater. Therefore, Arsenic concentration in groundwater of young Holocene sediments is higher than in older ones which elucidates that paleo-riverbed migration controls on Arsenic mobilization in groundwater in the study area.

Climate Change and Land Use Change of Rural Households in The Red River Delta, Vietnam

2013 ◽  
pp. 79-94
Author(s):  
Ngoc Luu Bich
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Agricultural Land ◽  
Rural Households ◽  
River Delta ◽  
Red River ◽  
Red River Delta ◽  
Sea Levels ◽  
Main Production ◽  
Farming Households

Climate change (CC) and its impacts on the socio-economy and the development of communities has become an issue causing very special concern. The rise in global temperatures, in sea levels, extreme weather phenomena, and salinization have occurred more and more and have directly influenced the livelihoods of rural households in the Red River Delta – one of the two regions projected to suffer strongly from climate change in Vietnam. For farming households in this region, the major and traditional livelihoods are based on main production materials as agricultural land, or aquacultural water surface Changes in the land use of rural households in the Red River Delta during recent times was influenced strongly by the Renovation policy in agriculture as well as the process of industrialization and modernization in the country. Climate change over the past 5 years (2005-2011) has started influencing household land use with the concrete manifestations being the reduction of the area cultivated and the changing of the purpose of land use.

Phosphate immobilisation dynamics and interaction with arsenic sorption at redox transition zones in floodplain aquifers: Insights from the Red River Delta, Vietnam

2021 ◽  
Vol 411 ◽  
pp. 125128
Author(s):  
Harald Neidhardt ◽  
Sebastian Rudischer ◽  
Elisabeth Eiche ◽  
Magnus Schneider ◽  
Emiliano Stopelli ◽  
...  
Keyword(s):  
River Delta ◽  
Red River ◽  
Red River Delta ◽  
Transition Zones ◽  
Redox Transition

The epidemiology of nematode and fluke infections in cattle in the Red River Delta in Vietnam

2000 ◽  
Vol 93 (2) ◽  
pp. 141-147 ◽  
Author(s):  
W.G Holland ◽  
T.T Luong ◽  
L.A Nguyen ◽  
T.T Do ◽  
J Vercruysse
Keyword(s):  
River Delta ◽  
Red River ◽  
Red River Delta

Paddy rice mapping in red river delta region using landsat 8 images: Preliminary results

2017 ◽  
Author(s):  
Man Duc Chuc ◽  
Nguyen Hoang Anh ◽  
Nguyen Thanh Thuy ◽  
Bui Quang Hung ◽  
Nguyen Thi Nhat Thanh
Keyword(s):  
Paddy Rice ◽  
River Delta ◽  
Red River ◽  
Landsat 8 ◽  
Delta Region ◽  
Red River Delta ◽  
Preliminary Results
Sign in / Sign up

Export Citation Format

Share Document