When measured daily outflow (IRESCO = 3) is chosen as the method to calculate reservoir outflow, the user must provide a file with the outflow rate for every day the reservoir is simulated in the watershed. The volume of outflow from the reservoir is then calculated:
8:1.1.8
where is the volume of water flowing out of the water body during the day (m HO), and is the outflow rate (m/s).