4.1 The three tank system (forecasting low-dynamic signals)The three tanks system is an experimental setup, and its schematic is depicted in Figure 2. It is operated by a variable speed motor pump, where water from the reservoir is pumped into tanks 1 and 2 via a 3-way valve. The water from tank 2 flows down to tank 3, and then back to the reservoir through the outlet at the bottom of the tank. There is also an outlet at the bottom of tank 1, and waterfrom the tank is fed back to the reservoir via its outlet.