A set of empirical equations relating channel shape to discharge, sediment load, and bank resistance. The theory proposes that dominant channel characteristics remain stable for a period of years and that any change in the hydrologic or sediment regime leads to a quantifiable channel response (such as erosion or deposition). Valentine and Haidera (2005) Water Manage. 158, 2 propose a modification to the Wallingford rational regime theory. See also Eaton and Millar (2004) Geomorph. 66, 1–2. Eaton and Church (2007) J. Geophys. Res. 112, F03025 find that classical hydraulic geometry represents only an approximation of the variation in channel forms.
Subjects: Earth Sciences and Geography.