River Regime
A river regime is the seasonal pattern of discharge in a river, showing how water flow varies throughout the year. Different river regimes reflect different climates and seasonal variations in precipitation and evapotranspiration, producing characteristic hydrographs when plotted monthly.
Real World
The River Nile historically had a single annual flood peak driven by the Ethiopian monsoon — a regime so predictable that ancient Egyptian agriculture was entirely built around it.
Exam Focus
When comparing river regimes, explicitly link discharge peaks to precipitation seasonality and evapotranspiration rates to score full marks.
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