Fish Screens : Irrigation NZ

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Fish Screens

2019 – 2022: SFF 405972 Adoption of Good Practise Fish Screening Project

Fish screens design and installation involves significant investment. Given the large capital outlay ahead for irrigators, clear expectations need to be set around how to achieve effective fish screens, alongside the provision of greater certainty that the designers and installers of fish screens can achieve long-term compliance for irrigators.

In late 2019 IrrigationNZ (on behalf of the New Zealand Fish Screen Working Group*), received a grant from the Sustainable Farming Fund to further research fish screen design criteria. The aim of the research is to provide clear and simple guidance on fish screen requirements and provide solutions and guidance on existing fish screen deficiencies.

This work is helping to develop more effective fish screen designs by getting a better understanding of fish behaviour at intakes, improving design guidance and informing the development of appropriate future consent conditions.

To date the following has been completed:

Summary Status Report identifying gaps still to address and a status update of existing information including key new information now available since the original 2007 Fish Screening guidelines were published. This report incorporates relevant information from throughout New Zealand.
Identification of three sites suitable to address compliant design. These sites cover ‘typical intake locations’ and represent a range of flows and challenges. They are small to medium in size and exclude large takes. Agreement with landowners of the three sites to participate in the project has been been achieved, options reports have been completed and the technical design of the water intake for each location is due for completion next month.
Field and Laboratory trial scope and design methodologies have been defined.
Year 1 Lab Trials have been completed with year 2 trials underway. Fish screen Lab Trial report – Year 1 is now available.

Information and reports will continue to be updated on this page as the project progresses.

*The New Zealand Fish Screen Working Group is a subgroup of the Canterbury Water Management Strategy and consists of representatives from the following: