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A plot of rainfall intensity versus time is called?

  • A.Hydro graph
  • B.Man curve
  • C.Hyeto graph
  • D.Isohyets

Answer: C

A plot of rainfall intensity against time is a hyetograph.

A hyetograph is usually drawn as a bar chart of rainfall intensity (or depth) in successive time intervals during a storm. It shows how the storm developed and is the input from which runoff hydrographs are computed.

A hydrograph plots river discharge against time, the output of the catchment rather than the rain. Isohyets are lines of equal rainfall drawn on a map, showing distribution in space, not time. A mass curve plots cumulative rainfall against time; 'Man curve' as printed is not a standard term.

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