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A graph of discharge, or of the level of water in a river throughout a period of time. The latter, known as a stage hydrograph, can be converted into a discharge hydrograph by the use of a stage-discharge rating curve. Hydrographs can be plotted for hours, days, or even months. A storm hydrograph is plotted after a rainstorm to record the effect on the river of the storm event.

Subjects: Earth Sciences and Geography — Ecology and Conservation.

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