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:
Vflowout​=86400∗qout​ 8:1.1.8
where Vflowout​ is the volume of water flowing out of the water body during the day (m3 H2​O), and qout​ is the outflow rate (m3/s).