River discharge is the average volume of water moving past a point each second.

• This game uses average discharge figures in cubic meters per second, usually written as m3/s.
• A bigger number means more water flow. It does not automatically mean the river is longer, wider, or more famous.
• Some entries are major tributaries rather than the main stem of a basin, which is why familiar names can sit below less famous ones.
• These are reference averages compiled from multiple hydrology sources, not one synchronized live gauge reading.

Rivers do not just differ by length. Some move whole inland seas every second.