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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/6125
Title: Chemical weathering rates in the Alaknanda-Bhagirathi river basins in Himalayas, India
Authors: Chakrapani, Govind Joseph
Saini R.K.
Yadav S.K.
Published in: Journal of Asian Earth Sciences
Abstract: The Alaknanda and Bhagirathi rivers flow through the Higher and Lesser Himalayas and confluence at Devprayag, which represents the origin of the Ganga (or Ganges) river. In the present study, a vast number of temporal and spatial samples of the river waters were collected and analyzed for major cations and anions. In addition, more recent and time series water flow data have been obtained and based on these inputs, a more refined dissolved flux rates have been estimated. The Alaknanda and Bhagirathi rivers show significant variations in chemical compositions during different seasons. Carbonate rock weathering is responsible for more than 70% of the chemical compositions in the river waters. The chemical weathering rates show seasonal variations and are much higher during non-monsoon season. The dissolved flux of Alaknanda river is much higher (1.80 × 106 tons yr-1) as compared to the Bhagirathi river (0.34 × 106 tons yr-1). The chemical weathering rates in the basin vary between 85 and 155 tons km-2 yr-1, which is significantly higher compared to the global average of ?24 tons km-2 yr-1. © 2008 Elsevier Ltd. All rights reserved.
Citation: Journal of Asian Earth Sciences (2009), 34(3): 347-362
URI: https://doi.org/10.1016/j.jseaes.2008.06.002
http://repository.iitr.ac.in/handle/123456789/6125
Issue Date: 2009
Keywords: Alaknanda
Bhagirathi
Chemical weathering
Himalayan Rivers
ISSN: 13679120
Author Scopus IDs: 6701873646
14521603000
35551299800
Author Affiliations: Chakrapani, G.J., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Saini, R.K., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Yadav, S.K., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Funding Details: The study was supported through funds from the Department of Science and Technology (Grant No. SR/S4/ES-18/2002). The enjoyable company and help rendered by P. Purushothaman in field and laboratory is gratefully acknowledged. Also, we deeply appreciate the comments of the two anonymous reviewers and Prof. Bor-ming Jahn, which improved the manuscript vastly.
Corresponding Author: Chakrapani, G.J.; Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, 247 667, India; email: gjcurfes@iitr.ernet.in
Appears in Collections:Journal Publications [ES]

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