The Kaihu River Management Plan deals with the management of the Kaihu River System with the goal of reducing the risks associated with flooding.
River management includes flood hazard identification, options to reduce flood hazards, catchment sustainability and emergency management.
Interim Kaihu River Management Plan
The Interim Kaihu River Management Plan 2006 has been revised by NRC in conjunction with the Kaihu River Flood Management Scheme Liaison Committee.
The Plan is non-statutory, which means that it contains no regulations such as the rules you will find in district or regional planning documents.
Find the Interim Kaihu River Management Plan (October 2006)
The Draft Revised Kaihu River Management Plan is available below.
View the Draft Revised Kaihu River Management Plan (1 MB)
Investigation
The NRC is working with the Kaihu River Management Liaison Committee to investigate options for reducing flood risk in the Kaihu River valley, from flooding of the Kaihu River.
This work is part of the Council’s Priority Rivers Project and was initiated in 2008, following the direction described in the Interim Kaihu River Management Plan.
The investigations have assessed the impact of stopbanks, spoil heaps and the railway embankment, the role of ponding areas and the general flood flow dynamics in the Kaihu River valley. Extensive surveying, both conventional and LiDAR has been undertaken and a computer model of the river hydrology and hydraulics developed and calibrated. A number of reports have been generated form these investigations and are outlined in the following reports.
Kaihu Flood Control Scheme Investigation Stages
Stages 1 and 2 (November 2008)
- Hydraulic & hydrologic model build
- Base case flooding conditions for 2, 5, 10 & 100 year ARI
Stage 3a (May 2009)
- Initial model used to assess; widening the lower river and affects of stopbanking on flood water distribution and duration
Stage 3b (September 2009)
- Questions relating to alignment of the Kaihu outlet on the Northern Wairoa River
Scheme Concept (June 2009)
- Presenting the proposed ‘spillway’ river scheme concept to ratepayers
Stage 3c (April and October 2010)
- Hydraulic and hydrologic models refined
- Preliminary flood scheme design and cost estimations commenced for the proposed ‘spillway’ river scheme