Unit Hydrograph Theory
Water
Unit Hydrograph Theory states that surface runoff hydrographs for storm events of the same duration will have the same shape, and the ordinates of the hydrograph will be proportional to the ordinates of the unit hydrograph. For example, the hydrograph for ½" of storm runoff will be half that of that from the unit hydrograph.
- — Service Hydrologist Reference Manual Glossary of Hydrologic Terms retrieved 2014-06-01