draft revised kaihu river management plan - Northland Regional ...

Revised Kaihu Management Plan March 20102. INTRODUCTION2.1. OBJECTIVESThe Revised Kaihu River Management Plan sets out the guidelines under whichthe landholders and residents of the Kaihu River catchment, the Kaipara DistrictCouncil and the Northland Regional Council will manage the Kaihu River and itsfloodplain. The Plan sets out to:Reduce the threat to residential development in the settlements of Kaihu,between Kaihu and Ahikiwi, and in Dargaville-Mangawhare.Reduce the sediment load in the Kaihu River through river managementand soil conservation initiatives.Maintain the Kaihu River according to agreed performance standards.3. PROPOSED LEVEL OF SERVICE FOR MANAGEMENT PLAN 2010-2016Section 1 & Section 2 - Parore to Northern Wairoa River Maintain an effective channel in the Kaihu River, by machine cleaningaccumulated sediment and spraying infestations of ricegrass and giant rush,to within a range of plus or minus 10% of the 2011 cross sectional profile 1dimensions of the Kaihu River Scheme.The Kaipara District Council will be responsible for constructing andmaintaining any protection works required for the Dargaville township.Section 3 – Rotu Bottleneck to Parore Maintain an effective channel in the Kaihu River, by machine cleaningaccumulated sediment and spraying infestations of ricegrass and giant rush,to within a range of plus or minus 10% of 2011 cross sectional profile.Section 4 – Waihue Road, Mamaranui, to Rotu Bottleneck Maintain an effective channel in the Kaihu River between Mamaranui andRotu Bottleneck to within plus or minus 10% of the 2011 cross sectionalprofile dimensions.Reduce streambank erosion by maintaining the streambanks as and whererequired and by removing sediment as it accumulates on the banks on theinside of bends. Remove significant obstructions within the river channel that may beobstructing flood flows and/or have potential to exacerbate stream bankerosion;1There is a provision in the Kaihu River Work Programme of 2010-2011 of Cross Sectional Profiling. This provision is forevery five years.Northland Regional Council - 5 -