5.7 Unit Hydrograph Options for Rural Areas - Visual OTTHYMO

For computation of flows from rural watersheds, the subroutines NASHYD, WILHYD or SCSHYD (NASHYD with N=5) can be used. The rainfall excess distribution is obtained by means of a modified CN procedure, which is then convoluted with the unit hydrograph obtained by means of the Nash model (NASHYD) or the Williams and Hann unit hydrograph (WILHYD).

5.6 Use of IUH’s for I/I Simulation and Baseflow (DWF)

5.7.1 Instantaneous Unit Hydrograph