Portuguese to English Tech/Engineering Energy / Power Generation terminolgy?

This is taken from an Insurance claim report for the defective Turbine, relative to the assessment of the lost generating energy during the time the generator was out of action.

Vertida in this context = Flow, Spillway, Spilt ?????

Below is the complete context


Para cada dia, o Segurado calcula a Energia Vertida em função do engolimento e das perdas conhecidas da usina, conforme a seguir