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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/25504
Title: Late Pleistocene-Holocene hydrologic changes in the interfluve areas of the central Ganga Plain, India
Authors: Srivastava, P.
Singh I.B.
Sharma S.
Shukla U.K.
Singhvi A.K.
Published in: Geomorphology
Abstract: Abandoned channel belts, ponds and point bar deposits of palaeochannels in the interfluve regions of the central Ganga Plain suggest changes in the morphohydrologic conditions during the Latest Pleistocene-Holocene. Stratigraphy of these ponds comprises channel sand at the base overlain by shell-bearing clayey silt. The contact of the two facies marks the phase when channels converted into standing water bodies. Point bar deposits of some palaeochannels are overlain by oxidised aeolian sand, indicating that the channel abandonment possibly occurred due to the desiccation and aridity in the region. Optically stimulated luminescence (OSL) chronometry of the pond sediments suggests that the deposition of the basal channel sand started before 13 ka and continued up to ∼8 ka. The ponds formed around 8-6 ka when the channel activity ceased. Evidence from the point bar deposits also indicates that the fluvial activity in the region ended sometime during 7-5 ka. This was followed by aeolian aggradation. The present study thus suggests that the hydrologic conditions in the Gangetic plains, i.e. initiation of channels and their abandonment, formation of microgeomorphologic features such as ponds and their eventual siltation, were controlled largely by climatic changes (i.e. monsoon changes) supported by tectonic activity. For the past 2 ka, increasing human and related agricultural activity has substantially accentuated the natural siltation rate of ponds. © 2003 Elsevier Science B.V. All rights reserved.
Citation: Geomorphology, 54(44654): 279-292
URI: https://doi.org/10.1016/S0169-555X(02)00361-6
http://repository.iitr.ac.in/handle/123456789/25504
Issue Date: 2003
Publisher: Elsevier
Keywords: Alluvial ridges
Ganga Plain
Holocene climate change
Interfluve
Luminescence dating
Ponds
ISSN: 0169555X
Author Scopus IDs: 57202563023
7401774897
57203101902
7004445893
22999666300
Author Affiliations: Srivastava, P., Planetary and Geoscience Division, Physical Research Laboratory, Navrangpura, Ahmedabad 380 009, India
Singh, I.B., Department of Geology, Lucknow University, Lucknow 226007, India
Sharma, S., Department of Geology, Lucknow University, Lucknow 226007, India
Shukla, U.K., Department of Geology, Kumaun University, Nainital 263 002, India
Singhvi, A.K., Planetary and Geoscience Division, Physical Research Laboratory, Navrangpura, Ahmedabad 380 009, India
Funding Details: PS and SS acknowledge Council of Scientific and Industrial Research, New Delhi, for research fellowship. Dr. A.K. Tangri, Uttar Pradesh Remote Sensing Application Centre, Lucknow is thanked for help with the remote sensing data. Constructive comments by Prof. Vishwas Kale, Pune, Prof. Avijit Gupta and an anonymous reviewer helped in improving the presentation. UKS thanks the Department of Geology, Kumaun University for working facilities. Bangladesh Council of Scientific and Industrial Research, BCSIR
Corresponding Author: Singhvi, A.K.; Planetary and Geoscience Division, , Navrangpura, Ahmedabad 380 009, India; email: singhvi@prl.ernet.in
Appears in Collections:Journal Publications [ES]

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