Journal ArticleDOI
Backwash-and-swash-oriented current crescents: indicators of beach slope, current direction and environment
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In this paper, backwash-and-swash-oriented current crescents are reported, with their detailed morphology and formation mechanism from the siliciclastic fine sandy beaches of Sagar Island and Lower Long Sand, two tidal islands of the Ganga estuary, northeast India.About:
This article is published in Sedimentary Geology.The article was published on 1993-04-01. It has received 15 citations till now. The article focuses on the topics: Swash.read more
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Water quality management in the lower stretch of the river Ganges, east coast of India: an approach through environmental education
Santosh Kumar Sarkar,Mahua Saha,Hideshige Takada,Asokkumar Bhattacharya,Pravakar Mishra,Badal Bhattacharya +5 more
TL;DR: In this paper, the physicochemical characteristics and level of dissolved heavy metals at three ecologically distinct zones along the course of the Ganges river were examined and it was revealed that socioeconomic development of Calcutta, the most potential economic zone in India situated on the east bank of Hugli river, has had a significant impact on the water quality of this major river.
Journal ArticleDOI
Polycyclic Aromatic Hydrocarbons in Intertidal Marine Bivalves of Sunderban Mangrove Wetland, India: An Approach to Bioindicator Species
O. Zuloaga,A. Prieto,Aresatz Usobiaga,S. K. Sarkar,Mousumi Chatterjee,Bhaskar Deb Bhattacharya,A. Bhattacharya,Md. A. Alam,Kamala Kanta Satpathy +8 more
Abstract: The paper presents the first comprehensive account of congener profiles of polycyclic aromatic hydrocarbons (PAHs) in intertidal bivalve mollusks [Meretrix meretrix, Macoma birmanica, and Sanguilonaria (Soletellina) acuminata] of Sunderban mangrove wetland (India). The main aim of this work was to use the bivalves as bioindicators of the contamination of the 16 USEPA PAH. The PAH profile in bivalves is largely dominated by a petrogenic fingerprint, with over-imposition of pyrolytic PAH sources, as evidenced by diagnostic molecular ratios. Bioaccumulation factors (BAF) of individual compounds from the sediments were calculated, and it reveals overall higher values in the visceral mass of the bivalves. S acuminata showed significantly higher levels of PAHs, especially the high molecular weight (HMW) PAHs, compared to the other two species as a sensitive indicator of trace organic stress in future monitoring programs.
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Experimental investigation of the impacts of coherent flow structures upon turbulence properties in regions of crescentic scour
H. Maity,Bijoy S. Mazumder +1 more
TL;DR: In this article, the spatial distribution of third-order moments of velocity fluctuations, the turbulent kinetic energy (TKE) fluxes, and the conditional statistics of Reynolds shear stress across the equilibrium crescentic scour structures generated upstream of short horizontal static cylinders were examined.
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Classification, formation, and transport mechanisms of mud clasts
TL;DR: In this article, the relative balance of volumetric abundance of sedimentary clasts in non-marine to marine sedimentary records is identified as the most important criterion for classification.
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Generation, transport and preservation of armoured mudballs in an ephemeral gully system
TL;DR: In this paper, the authors used two adjacent catchments developed on identical geology in southeast Spain that offer a unique opportunity to examine the key controls on armoured mudball development as one catchment produces armoured mudballs whilst the second does not.
References
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Sedimentary structures, their character and physical basis
TL;DR: In this article, a model of transverse bedforms in Unidirectional Flows is presented, along with cross-stratification patterns of Ripples and Dunes in Changing Flows.
Journal ArticleDOI
On the Application of Quantitative Methods to the Study of the Structure and History of Rocks
TL;DR: In this paper, the authors apply experimental physics to the study of rocks and apply it to six different kinds of physical questions, some of which have been sufficiently studied, but others require experiments which would be very difficult to carry out, and all that can now do is to attempt to deduce plausible results from what is known.
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On bed forms and palaeocurrents
TL;DR: In this paper, a more flexible and comprehensive approach to palaeocurrent analysis was proposed, in which the geometry of bed forms is two-dimensional or three-dimensional, depending on the interaction between a fluid flow and the sediment transported over or close to the bed.
Journal ArticleDOI
Sediments and Bed Forms on a Braided Outwash Plain
TL;DR: In this article, the authors compared sediments and bed forms from three braided outwash plains and one steep non-braided mountain stream in the Rocky Mountains of Alberta to those exposed in a paleo-out...
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