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How much water does the Brahmaputra River contribute to the Ganges-Brahmaputra river system?

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Map showing the course of the Brahmaputra River as it flows from southwestern China through northeastern India and into Bangladesh, with surrounding countries including Bhutan, Nepal, Myanmar, Pakistan, and Afghanistan labeled. The river's path is highlighted in blue, and major international boundaries are marked. — Brahmaputra River Brahmaputra River.

The Ganges-Brahmaputra river system has the third greatest average discharge of any river system in the world, totaling approximately 1,086,500 cubic feet (30,770 cubic meters) per second. Of this total volume, the Brahmaputra River contributes approximately 700,000 cubic feet (19,800 cubic meters) per second.12