scholarly journals A first-order geochemical budget for suspended sediment discharge to the Bay of Bengal from the Ganges-Brahmaputra river system

2020 ◽  
Vol 726 ◽  
pp. 138667
Author(s):  
Matthew Dietrich ◽  
Kelsea B. Best ◽  
Jessica L. Raff ◽  
Elli R. Ronay
Keyword(s):  
Suspended Sediment ◽  
Bay Of Bengal ◽  
River System ◽  
Sediment Discharge ◽  
Brahmaputra River ◽  
First Order ◽  
The Ganges

scholarly journals Downstream and seasonal changes of lithium isotope ratios in the Ganges‐Brahmaputra river system

2017 ◽  
Vol 18 (8) ◽  
pp. 3003-3015 ◽  
Author(s):  
Takuya Manaka ◽  
Daisuke Araoka ◽  
Toshihiro Yoshimura ◽  
H. M. Zakir Hossain ◽  
Yoshiro Nishio ◽  
...  
Keyword(s):  
Seasonal Changes ◽  
River System ◽  
Isotope Ratios ◽  
Lithium Isotope ◽  
Brahmaputra River ◽  
The Ganges

Distribution of suspended sediment in the coastal sea off the Ganges–Brahmaputra River mouth: observation from TM data

2002 ◽  
Vol 32 (4) ◽  
pp. 307-321 ◽  
Author(s):  
Mohammad Rezwanul Islam ◽  
Syeda Fahliza Begum ◽  
Yasushi Yamaguchi ◽  
Katsuro Ogawa
Keyword(s):  
Suspended Sediment ◽  
River Mouth ◽  
Brahmaputra River ◽  
Coastal Sea ◽  
The Ganges

scholarly journals Stable Strontium Isotopic Compositions of River Water, Groundwater and Sediments From the Ganges–Brahmaputra–Meghna River System in Bangladesh

2021 ◽  
Vol 9 ◽  
Author(s):  
Toshihiro Yoshimura ◽  
Shigeyuki Wakaki ◽  
Hodaka Kawahata ◽  
H. M. Zakir Hossain ◽  
Takuya Manaka ◽  
...  
Keyword(s):  
River Water ◽  
Chemical Weathering ◽  
Drainage Basin ◽  
Dissolution Kinetics ◽  
River System ◽  
Ganges River ◽  
Brahmaputra River ◽  
Terrestrial Water ◽  
Stable Strontium ◽  
The Ganges

The Sr isotopic composition of rivers and groundwaters in the Bengal Plain is a major contributor to the global oceanic Sr inventory. The stable strontium isotope ratios (δ88Sr) provide a new tool to identify chemical weathering reactions in terrestrial water. In this study, we investigated the spatiotemporal variations of δ88Sr in samples of river water, bedload sediment, and groundwater collected from the Ganges–Brahmaputra–Meghna drainage basin in Bangladesh, which is known to strongly influence the 87Sr/86Sr ratio in seawater. The average δ88Sr values of waters of the Ganges, Brahmaputra, and Meghna rivers were 0.269, 0.316, and 0.278‰, respectively. Our data showed little difference between seasons of high and low discharge. The δ88Sr values measured in sequential leaching fractions of sediments varied from –0.258 to 0.516‰ and were highest in the silicate fraction, followed in turn by the carbonate fraction and the exchangeable fraction. Both 87Sr/86Sr and δ88Sr of these waters are primarily controlled by the inputs of Sr in weathering products from the Bengal Plain and Sr from the Himalayan rivers (Ganges and Brahmaputra). Values of δ88Sr and Sr/Ca were higher in the Brahmaputra River than in the Ganges River, a difference we attribute to greater input from silicate weathering. The variations of δ88Sr and 87Sr/86Sr were greater in groundwater than in river waters. Mineral sorting effects and dissolution kinetics can account for the large scatter in 87Sr/86Sr and δ88Sr values. The depth profile of δ88Sr showed wide variation at shallow depths and convergence to a narrow range of about 0.31‰ at depths greater than 70 m, which reflects more complete equilibration of chemical interactions between groundwater and ambient sediments owing to the longer residence time of deeper groundwater. We found that δ88Sr values in the groundwater of Bangladesh were almost identical to those of river water from the lower Meghna River downstream of its confluence with the Ganges–Brahmaputra river system, thus confirming that the δ88Sr composition of the groundwater discharge to the Bay of Bengal is very similar to that of the river discharge.

Subaqueous delta of the Ganges-Brahmaputra river system

1997 ◽  
Vol 144 (1-3) ◽  
pp. 81-96 ◽  
Author(s):  
Steven A. Kuehl ◽  
Beth M. Levy ◽  
Willard S. Moore ◽  
Mead A. Allison
Keyword(s):  
River System ◽  
Brahmaputra River ◽  
The Ganges

scholarly journals Message in a bottle: Open source technology to track the movement of plastic pollution

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0242459
Author(s):  
Emily M. Duncan ◽  
Alasdair Davies ◽  
Amy Brooks ◽  
Gawsia Wahidunnessa Chowdhury ◽  
Brendan J. Godley ◽  
...  
Keyword(s):  
Open Source ◽  
Bay Of Bengal ◽  
Animal Movement ◽  
Public Awareness ◽  
River System ◽  
Educational Outreach ◽  
Source Tracking ◽  
Ganges River ◽  
Plastic Pollution ◽  
The Ganges

Rivers worldwide are now acting as major transport pathways for plastic pollution and discharge large quantities of waste into the ocean. Previous oceanographic modelling and current drifter data have been used to predict the movement and accumulation of plastic pollution in the marine environment, but our understanding of the transport and fate through riparian systems is still largely unknown. Here we undertook a proof of concept study by applying open source tracking technology (both GPS (Global Positing System) cellular networks and satellite technology), which have been successfully used in many animal movement studies, to track the movements of individual plastic litter items (500 ml PET (polyethylene terephthalate) drinks bottles) through the Ganges River system (known as the Ganga in India and the Padma and Meghna in Bangladesh, hereafter known as the Ganges) and the Bay of Bengal. Deployed tags were successfully tracked through the Ganges river system and into the Bay of Bengal marine system. The “bottle tags” were designed and built (e.g. shape, size, buoyancy) to replicate true movement patterns of a plastic bottle. The maximum distance tracked to date is 2845 km over a period of 94 days. We discuss lessons learnt from the development of these plastic litter tags, and outline how the potential widespread use of this open source technology has the ability to significantly increase understanding of the location of accumulation areas and the timing of large inputs of plastic pollution into the aquatic system. Furthermore, “bottle tags” may act as a powerful tool for stimulating social behaviour change, informing science-based policy, and as valuable educational outreach tools for public awareness.

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