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Singh, Dhruv Sen
- Late Pleistocene and Early Holocene Climate of Ny-Alesund, Svalbard (Norway): A Study based on Biological Proxies
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Authors
Vartika Singh
1,
Anjum Farooqui
1,
Naresh C. Mehrotra
1,
Dhruv Sen Singh
2,
Rajni Tewari
1,
Neerja Jha
1,
Ratan Kar
1
Affiliations
1 Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow – 226 007, IN
2 Centre for Advance Studies in Geology, Lucknow University, Lucknow – 226 007, IN
1 Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow – 226 007, IN
2 Centre for Advance Studies in Geology, Lucknow University, Lucknow – 226 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 78, No 2 (2011), Pagination: 109-116Abstract
Subsurface sediments of a 120 cm deep trench from Ny-Alesund, Svalbard, were analysed for pollenspores and other organic matter contents. This study is supported by two AMS 14C dates (27, 200 yrs BP and 8,762 yrs BP) at the bottom and topmost litho-unit of the trench, respectively. The pollen record provides an evidence of a warm interval at about 27,200 yr BP (Late Weichselian and MIS 3) and cooling episode around 8,762 yr BP. This is also supported by the amount and type of organic matter as well as sediment type and depositional history of the trench sediments.Keywords
Biological Proxies, Trench Section, Late Weichselian, Ny-Alesund, Svalbard.
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- Implication of Drainage Basin Parameters of Chhoti Gandak River, Ganga Plain, India
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Authors
Affiliations
1 Centre of Advanced Study in Geology, University of Lucknow, Lucknow–226 007, IN
1 Centre of Advanced Study in Geology, University of Lucknow, Lucknow–226 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 78, No 4 (2011), Pagination: 370-378Abstract
The drainage basin parameters of the groundwater-fed Chhoti Gandak River originating in the terai area of the Ganga Plain were analyzed using topographical sheets, satellite data, and field documentation with emphasis to its implication for flood mitigation and recharging of groundwater. The analyses indicate dominance of first order streams, gentle slope gradient, low surface run-off, low sediment production, high infiltration rate, and low value of basin relief. The low water storage capacity, spreading of water and concentration of peak discharge in the distal part of the river basin explain that whenever precipitation is high in the catchment area there is flood in the distal part of the basin. The bifurcation ratio value (4.34) of this basin describes that the drainage is carved naturally by slope and local relief and not influenced by geological structures like lineaments and faults.
These parameters provide useful information for the prediction of basin behavior during prolonged heavy rainfall that generate floods and suggest that water resource management and developmental planning should be done with reference to the drainage basin parameters.
Keywords
Morphometric Analysis, Flooding, Chhoti Gandak, Ganga Plain.References
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