How Do You Find The Direct Runoff From The Unit Hydrograph?
How Do You Find The Direct Runoff From The Unit Hydrograph? For example, if a rainfall of P1 inches occurs during a time interval of Δt, the total runoff hydrograph is P1 multiplied by the total unit hydrograph, which is the blue curve (PUH_1) in the figure below. If the rainfall stops after Δt, this