generator temperature in reference conditions (T0); common efficiency of inverter, motor, and pump (ηMPI); efficiency of trickle irrigation system (ηN); decadal average daily irradiation (Es(i)); real decadal average daily insolation (tr(i)); height from the ground level around the borehole to the output of water from pipes (H0T); static level (HST(i)); dynamic level (HDT); level drop in pipeline due to friction (HF); maximum discharge capacity of borehole (Qmax); average flow rate (QAP) and apparent flow coefficient