Triangular Unit Hydrograph
Triangular Unit Hydrograph in GoldSim
This model uses the Triangular Unit Hydrograph method to calculate the direct runoff hydrograph (DRH). The inputs and results follow along with a companion Excel file and the output is shown in the "Excel Validation" time history plot. It is important to remember that this method requires that the time ordinates used in the array calculations MUST correspond to the simulation time step. Therefore, you must ensure that the value of Calc_Step is equal to the simulation's basic step. The steps involved in this method include finding the total excess rainfall, computing the unit hydrograph ordinates using the triangular unit hydrograph, and then add them up to determine the DRH.