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首页> 外文期刊>Journal of Asian earth sciences >Chemical Weathering Rates In The Alaknanda-bhagirathi River Basins In Himalayas, India
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Chemical Weathering Rates In The Alaknanda-bhagirathi River Basins In Himalayas, India

机译：印度喜马拉雅山Alaknanda-bhagirathi流域的化学风化率

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摘要

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 × 10~6 tons yr~(-1)) as compared to the Bhagirathi river (0.34 × 10~6 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).
机译：Alaknanda和Bhagirathi河流流经喜马拉雅山脉的上端和下端，并汇入Devprayag，这代表了恒河（或恒河）的起源。在本研究中，收集了大量河水的时空样本，并分析了其中的主要阳离子和阴离子。另外，已经获得了最新的和时间序列的水流量数据，并且基于这些输入，已经估计出更精确的溶解通量率。 Alaknanda河和Bhagirathi河在不同季节显示化学成分的显着变化。碳酸盐岩的风化作用占河水化学成分的70％以上。化学风化率显示出季节性变化，并且在非季风季节要高得多。与Bhagirathi河（0.34×10〜6吨yr〜（-1））相比，Alaknanda河的溶解通量高得多（1.80×10〜6吨yr〜（-1））。流域的化学风化率在85至155吨km〜（-2）yr〜（-1）之间，比全球平均水平的24吨km〜（-2）yr〜（-1）高得多。 ）。

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