The effective rainfall-direct runoff transformation through the overland flow mechanism is investigated in 10 synthetic watersheds represented by a combination of planes and channels. Assuming the hydrograph computed by the nonlinear kinematic wave as a bench mark, two approximations are developed. The first considers the dynamics of the overland flow in each "real" plane through that on a fictitious plane with averaged properties. The second keeps the nonlinear kinematic approach for both the planes and first order channels (Horton-Strahler ordering scheme), while the water routing in the remaining channels is represented by a piecewise linearized formulation of the kinematic wave equation. Both the approximations were found to be reasonable, but the second appears of larger practical interest.
Basin representation and direct runoff hydrograph for different basin sizes
CORRADINI, Corrado;MORBIDELLI, Renato
1996
Abstract
The effective rainfall-direct runoff transformation through the overland flow mechanism is investigated in 10 synthetic watersheds represented by a combination of planes and channels. Assuming the hydrograph computed by the nonlinear kinematic wave as a bench mark, two approximations are developed. The first considers the dynamics of the overland flow in each "real" plane through that on a fictitious plane with averaged properties. The second keeps the nonlinear kinematic approach for both the planes and first order channels (Horton-Strahler ordering scheme), while the water routing in the remaining channels is represented by a piecewise linearized formulation of the kinematic wave equation. Both the approximations were found to be reasonable, but the second appears of larger practical interest.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
