کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4732450 | 1356865 | 2009 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Chemical weathering rates in the Alaknanda-Bhagirathi river basins in Himalayas, India
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
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چکیده انگلیسی
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 Ã 106 tons yrâ1) as compared to the Bhagirathi river (0.34 Ã 106 tons yrâ1). The chemical weathering rates in the basin vary between 85 and 155 tons kmâ2 yrâ1, which is significantly higher compared to the global average of â¼24 tons kmâ2 yrâ1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Asian Earth Sciences - Volume 34, Issue 3, 31 March 2009, Pages 347-362
Journal: Journal of Asian Earth Sciences - Volume 34, Issue 3, 31 March 2009, Pages 347-362
نویسندگان
G.J. Chakrapani, R.K. Saini, S.K. Yadav,