On the spatial variation of arsenic in groundwater of the Red River floodplain, Vietnam

2016 ◽  
pp. 3-4 ◽  
Author(s):  
D Postma ◽  
F Larsen ◽  
R Jakobsen ◽  
H Sø ◽  
J Kazmierczak ◽  
...  
Keyword(s):  
Spatial Variation ◽  
Red River ◽  
River Floodplain ◽  
Arsenic In Groundwater

Arsenic in groundwater of the Red River floodplain, Vietnam: Controlling geochemical processes and reactive transport modeling

2007 ◽  
Vol 71 (21) ◽  
pp. 5054-5071 ◽  
Author(s):  
Dieke Postma ◽  
Flemming Larsen ◽  
Nguyen Thi Minh Hue ◽  
Mai Thanh Duc ◽  
Pham Hung Viet ◽  
...  
Keyword(s):  
Reactive Transport ◽  
Red River ◽  
Transport Modeling ◽  
Reactive Transport Modeling ◽  
Geochemical Processes ◽  
River Floodplain ◽  
Arsenic In Groundwater

scholarly journals An Early Ceramic Period Pit Feature at the Swan Lake Site (16BO11), Bossier Parish, Lousiana

1995 ◽  
Author(s):  
Jeffery S. Girard
Keyword(s):  
Sandy Soil ◽  
River Channel ◽  
Short Description ◽  
Red River ◽  
Initial Visit ◽  
River Floodplain ◽  
Swan Lake ◽  
Early Ceramic ◽  
Lake Site ◽  
Dark Soil

A pit feature containing Tchefuncte-like pottery, a Gary point, and fauna) remains recently was investigated at the Swan Lake Site (168011) located near Willow Chute Bayou in the Red River floodplain of eastern Bossier Parish. Three charcoal samples from the pit yielded radiocarbon ages of 2020 + /-60 B. P., 1830+/-70 B.P., and 1690+/-80 B.P. making this the earliest well-dated context in northwestern Louisiana containing ceramics. The most conspicuous feature at the site is a mound, now approximately 2.5 m high and about 25 min diameter. Clarence Webb first recorded the site, but only made a short description: "Solitary mound on n-east shore of Swan Lake, which is an old Red River channel. Is circular in shape, approx. 8-10 ft. high, 60 ft. at the base and 20 ft. on summit. Has several shallow trial holes on top, appears to be built up of sand -- no sherds found on or around mound -- trial holes show mostly sandy soil near clay out in field. In one or two places 3 to 4 inches dark soil found. In nearby field, 1 rough spear head found." Since Webb's initial visit the landowners have collected numerous artifacts from the site surface. Most of the decorated pottery consists of Early to Middle Caddoan Period types suggesting that the mound is related to those at the nearby Vanceville (16807) and Werner (16808) sites. However, also present are a large number of Gary points and several sherds similar to those recovered from the Bellevue Site (16BO4) indicating that an earlier occupation is represented as well.

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.

Mobilization of arsenic and iron from Red River floodplain sediments, Vietnam

2010 ◽  
Vol 74 (12) ◽  
pp. 3367-3381 ◽  
Author(s):  
Dieke Postma ◽  
Søren Jessen ◽  
Nguyen Thi Minh Hue ◽  
Mai Thanh Duc ◽  
Christian Bender Koch ◽  
...  
Keyword(s):  
Red River ◽  
River Floodplain ◽  
Floodplain Sediments

scholarly journals Hydrogeochemical controls on mobilization of arsenic in groundwater of a part of Brahmaputra river floodplain, India

2015 ◽  
Vol 4 ◽  
pp. 154-171 ◽  
Author(s):  
Chandan Mahanta ◽  
Gustav Enmark ◽  
Daniel Nordborg ◽  
Ondra Sracek ◽  
Bibhash Nath ◽  
...  
Keyword(s):  
Brahmaputra River ◽  
River Floodplain ◽  
Arsenic In Groundwater

scholarly journals Adsorption and desorption of arsenic to aquifer sediment on the Red River floodplain at Nam Du, Vietnam

2014 ◽  
Vol 142 ◽  
pp. 587-600 ◽  
Author(s):  
Nguyen Thi Hoa Mai ◽  
Dieke Postma ◽  
Pham Thi Kim Trang ◽  
Søren Jessen ◽  
Pham Hung Viet ◽  
...  
Keyword(s):  
Red River ◽  
Adsorption And Desorption ◽  
River Floodplain

scholarly journals Spatial Variation in Surface Soil Total Carbon and Its Relationship with Soil Color in a River Floodplain Ecosystem of Northern Ghana

2018 ◽  
Vol 52 (3) ◽  
pp. 219-228 ◽  
Author(s):  
Keisuke KATSURA ◽  
Takenori WATANABE ◽  
Naoki MORITSUKA ◽  
Yasuhiro TSUJIMOTO ◽  
Baba INUSAH ◽  
...  
Keyword(s):  
Spatial Variation ◽  
Surface Soil ◽  
Total Carbon ◽  
Northern Ghana ◽  
Soil Color ◽  
River Floodplain

Spatial variation in aquatic food webs in the Amazon River floodplain

2019 ◽  
Vol 38 (1) ◽  
pp. 213-228 ◽  
Author(s):  
Caroline C. Arantes ◽  
Kirk O. Winemiller ◽  
Miguel Petrere ◽  
Carlos E. C. Freitas
Keyword(s):  
Spatial Variation ◽  
Food Webs ◽  
Amazon River ◽  
River Floodplain ◽  
Aquatic Food Webs ◽  
Aquatic Food

scholarly journals A model for the evolution in water chemistry of an arsenic contaminated aquifer over the last 6000 years, Red River floodplain, Vietnam

2016 ◽  
Vol 195 ◽  
pp. 277-292 ◽  
Author(s):  
Dieke Postma ◽  
Thi Kim Trang Pham ◽  
Helle Ugilt Sø ◽  
Van Hoan Hoang ◽  
Mai Lan Vi ◽  
...  
Keyword(s):  
Water Chemistry ◽  
Red River ◽  
Contaminated Aquifer ◽  
River Floodplain
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