scholarly journals Late Quaternary sedimentary record and Holocene channel avulsions of the Jamuna and Old Brahmaputra River valleys in the upper Bengal delta plain

Geomorphology ◽  
2014 ◽  
Vol 227 ◽  
pp. 123-136 ◽  
Author(s):  
Jennifer L. Pickering ◽  
Steven L. Goodbred ◽  
Meredith D. Reitz ◽  
Thomas R. Hartzog ◽  
Dhiman R. Mondal ◽  
...  
Keyword(s):  
Late Quaternary ◽  
Sedimentary Record ◽  
Brahmaputra River ◽  
Bengal Delta ◽  
Delta Plain ◽  
River Valleys

GROUNDWATER ARSENIC IN SHALLOW AQUIFERS OF BENGAL DELTA PLAIN (WEST BENGAL): A MICROBIOLOGICAL APPROACH

2016 ◽  
Author(s):  
Jishnu Adhikari ◽  
◽  
Debashis Chatterjee ◽  
Shilajit Barua ◽  
Thomas R. Kulp
Keyword(s):  
West Bengal ◽  
Shallow Aquifers ◽  
Bengal Delta ◽  
Delta Plain ◽  
Groundwater Arsenic

Sources of organic carbon and depositional environment in the Bengal delta plain sediments during the Holocene period

Limnology ◽  
2009 ◽  
Vol 11 (2) ◽  
pp. 133-142 ◽  
Author(s):  
Hossain M. Anawar ◽  
Takahito Yoshioka ◽  
Eiichi Konohira ◽  
Junji Akai ◽  
M. C. Freitas ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Depositional Environment ◽  
The Holocene ◽  
Bengal Delta ◽  
Delta Plain ◽  
Holocene Period

scholarly journals Cryostratigraphy, sedimentology, and the late Quaternary evolution of the Zackenberg River delta, northeast Greenland

2017 ◽  
Vol 11 (3) ◽  
pp. 1265-1282 ◽  
Author(s):  
Graham L. Gilbert ◽  
Stefanie Cable ◽  
Christine Thiel ◽  
Hanne H. Christiansen ◽  
Bo Elberling
Keyword(s):  
Late Quaternary ◽  
Sediment Cores ◽  
River Delta ◽  
Optically Stimulated Luminescence ◽  
Delta Plain ◽  
Valley Fill ◽  
Subaerial Exposure ◽  
Facies Associations ◽  
Delta Progradation ◽  
Ice Content

Abstract. The Zackenberg River delta is located in northeast Greenland (74°30′ N, 20°30′ E) at the outlet of the Zackenberg fjord valley. The fjord-valley fill consists of a series of terraced deltaic deposits (ca. 2 km2) formed during relative sea-level (RSL) fall. We investigated the deposits using sedimentological and cryostratigraphic techniques together with optically stimulated luminescence (OSL) dating. We identify four facies associations in sections (4 to 22 m in height) exposed along the modern Zackenberg River and coast. Facies associations relate to (I) overriding glaciers, (II) retreating glaciers and quiescent glaciomarine conditions, (III) delta progradation in a fjord valley, and (IV) fluvial activity and niveo-aeolian processes. Pore, layered, and suspended cryofacies are identified in two 20 m deep ice-bonded sediment cores. The cryofacies distribution, together with low overall ground-ice content, indicates that permafrost is predominately epigenetic in these deposits. Fourteen OSL ages constrain the deposition of the cored deposits to between approximately 13 and 11 ka, immediately following deglaciation. The timing of permafrost aggradation was closely related to delta progradation and began following the subaerial exposure of the delta plain (ca. 11 ka). Our results reveal information concerning the interplay between deglaciation, RSL change, sedimentation, permafrost aggradation, and the timing of these events. These findings have implications for the timing and mode of permafrost aggradation in other fjord valleys in northeast Greenland.

Geomicrobiology of Arsenic-Contaminated Groundwater of Bengal Delta Plain

2017 ◽  
pp. 333-353 ◽  
Author(s):  
Pinaki Sar ◽  
Balaram Mohapatra ◽  
Soma Ghosh ◽  
Dhiraj Paul ◽  
Angana Sarkar ◽  
...  
Keyword(s):  
Contaminated Groundwater ◽  
Bengal Delta ◽  
Delta Plain

Late Quaternary floodplain reworking and the preservation of alluvial sedimentary archives in unconfined and confined river valleys in the eastern interior of South Africa

Geomorphology ◽  
2013 ◽  
Vol 185 ◽  
pp. 54-66 ◽  
Author(s):  
A. Keen-Zebert ◽  
S. Tooth ◽  
H. Rodnight ◽  
G.A.T. Duller ◽  
H.M. Roberts ◽  
...  
Keyword(s):  
South Africa ◽  
Late Quaternary ◽  
River Valleys

scholarly journals Influence of chemical fertilizers on arsenic mobilization in the alluvial Bengal delta plain: a critical review

2021 ◽  
Author(s):  
Md. Shajedul Islam ◽  
M. G. Mostafa
Keyword(s):  
Microbial Community ◽  
Strong Positive Correlation ◽  
Chemical Fertilizers ◽  
Arsenic Mobilization ◽  
Bengal Delta ◽  
Delta Plain ◽  
Arsenic In Groundwater ◽  
Guideline Value ◽  
High Arsenic

Abstract Arsenic contamination of alluvial aquifers of the Bengal delta plain causes a serious threat to human health for over 75 million people. The study aimed to explore the impacts of chemical fertilizer on arsenic mobilization in the sedimentary deposition of the alluvial Bengal delta plain. It selected ten comparatively higher affected Districts and the least affected two Divisions as a referral study site. The countrywide pooled concentration of arsenic in groundwater was 109.75 μg/L (52.59, 166.91) at a 95% confidence interval, which was double the national guideline value (50 μg/L). The analysis results showed a strong positive correlation (r ≥ 0.5) of arsenic with NO3, NH4, PO4, SO4, Ca, and K, where a portion of those species originated from fertilizer leaching into groundwater. The results showed that PO4 played a significant influence in arsenic mobilization, but the role of NO3, SO4, and NH4 was not clear at certain lithological conditions. It also showed that clay, peat, silt-clay, and rich microbial community with sufficiently organic carbon loaded soils could lead to an increase in arsenic mobilization. Finally, the study observed that the overall lithological conditions are the main reason for the high arsenic load in the study area.

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