Initial assessment of implications to benthic and fisheries habitat of the Opihi River [New Zealand]
1990
Palmer, K.L. | Sagar, P.M. (Freshwater Fisheries Centre, Christchurch (New Zealand))
The purpose of this report is to: identify the benthic invertebrate and fisheries species present in the Opihi River system, New Zealand, and the likely effects to population numbers and distribution resulting from a proposed water diversion; identify salmonid spawning and rearing areas within the Opihi and examine the effects which may or may not accrue; identify the minimum flows and/or water depths necessary to maintain fish passage to and from the salmonid spawning areas; evaluate the impact on fisheries of waters containing glacial silt together with higher suspended loadings resulting from increased (temporary) bed and bank erosion; and evaluate the impact to fisheries resulting from the projected hydrological regime changes, in particular, increased and more consistent summer flows
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