Passage Quality Index (PQI)

Definition

A score that indicates the relative biological performance of a turbine design or operation. The PQI is calculated as a function of both the probability of exposure and the probability of adverse response to that level of exposure and is the main result output from BioPA. A PQI of 500 assumes that passage is expected to have no effect on the fish. The lower the PQI, the larger the adverse effect.