Application Appendix H Fish Passage and Fish Screening Assessment 20 02053 4 0 + 5 other renewals Trustpower 25 Nov 2020
Environmental and structures (natural and man-made) that fish are able to negotiate over (both up and downstream). The diversion of water for abstraction poses another impediment to fish migration if there is no safe passage back to the river. Water diverted for hydro generation is potentially damaging for fish and lethal in some cases. Fish passing through turbines are subjected to pressure changes, cavitation and shear damage, and mechanical strike. The survival rate during turbine passage is