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Rate of sedimentation in the Yamuna river around Delhi using the226Ra−210Pb method
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For six sediment cores collected from Yamuna river (tributary of Ganges) around Delhi, rate of sedimentation was determined by the226Ra−210Pb method as discussed by the authors.Abstract:
For six sediment cores collected from Yamuna river (tributary of Ganges) around Delhi, rate of sedimentation was determined by the226Ra−210Pb method. While an average rate of 42 mm/y is obtained, there are variations core to core. A clear-cut downstream increase in the rate, from 5 mm/y when the river enters Delhi, to 80 mm/y when it leaves Delhi, indicates solid waste contribution from the urban areas. The sediment flux of 4000 mg/cm2/y is not balanced by the calculated rate of erosion (40 tonnes/km2/y) in the river. Thus, much of the sediment flux is of local origin.read more
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Heavy metals distribution in the sediments of ganges and Brahmaputra rivers
TL;DR: In this article, bed sediments were collected from the entire region of the Ganges basin and some parts of the Brahmaputra and analysed for a number of heavy metals (Fe, Mn, Ni, Cr, Cu, and Zn) by the thin-film energy dispersive X-ray fluorescence technique.
Journal Article
Assessment of metal concentration in the sediment cores of Manakudy estuary, south west coast of India.
S P Kumar,Edward J.K.P. +1 more
TL;DR: In this paper, the acid leachable trace metals (Cr, Cu, Ni, Co, Pb, Zn and Cd) were associated with Fe and Mn indicating their adsorption onto Fe-Mn oxyhydroxides.
Journal ArticleDOI
Chemical and sediment mass transfer in the Yamuna river-a tributary of the Ganges system
TL;DR: The average chemical erosion rate (165 t km −2 yr −1 ) of the Yamuna basin is much higher than that of the Ganges and the Indian average.
Journal ArticleDOI
Interconnected riverine–lacustrine systems as sedimentary repositories: Case study in southeast Michigan using 210Pb and 137Cs-based sediment accumulation and mixing models
Jason Jweda,Mark Baskaran +1 more
TL;DR: The first systematic establishment of sediment chronologies of river channel sediments, a set of seven sediment cores from Clinton River and Lake St. Clair riverine-lacustrine system were collected and analyzed for 210 Pb, 226 Ra, and 137 Cs activities as mentioned in this paper.
Journal ArticleDOI
Historical pollution trends in coastal environments of India.
TL;DR: It can be seen that the mean deposition rates of all the measured elements in the Tamil Nadu coastal ecosystems are high compared with rates determined for the sediments of the deltaic regions of India and the Bay of Bengal.
References
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Determination of recent sedimentation rates in lake michigan using pb – 210 and cs – 137
TL;DR: In this paper, the use of zloPb and 13'Cs radioactivity measurements to determine the rates of sedimentation in the Great Lakes was described. But the results were limited to eight locations in Lake Michigan.
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Geochronology of lake sediments
TL;DR: In this paper, it was shown that 210 Pb activity precipitated from the atmosphere is ideal for dating lake sediments of ⩽ 100 yr age, since lead is quickly removed from solution on to particulate matter so that the lead activity is easily measurable in lakes and forms a method of pinpointing the sediment strata accumulated in 1963-1964, the peak years of its fallout.
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Th-228/Th-232 and Pb-210 geochronologies in marine and lake sediments
TL;DR: In this article, the authors used the surface levels of the deposits analyzed, there is nearly an order of magnitude more unsupported than supported Th-228, indicating that both radium and thorium isotopes are removed from solution in these coastal zones quite rapidly after introduction or formation.
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226Ra distribution in the Antarctic Ocean
Teh-Lung Ku,Mu-Ching Lin +1 more
TL;DR: In this article, the results of the GEOSECS program from the Antarctic Ocean and its vicinity in both the Atlantic and the Pacific are presented, and the precision (1 σ) based on triplicate analyses averages about ± 2.5%.
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210Pb geochronology of sediments from Lake Shinji
TL;DR: In this article, sediment cores were collected from four sites of Lake Shinji, Japan and the unsupported 210Pb (210Pbexcess) in surface layer ranged from 12 to 19 dpm/g.