Ngunguru Catchment Working Group - Readings

Below is a list of selected readings on relevant topics at the request of members and attendees of the inaugural meeting 11 November 2015.

This list is made of contract reports, literature reviews, PowerPoint presentations, data and results of Northland Regional Council programmes. This list is by no means exhaustive, simply a summary of facts and information available for group members to digest outside of regular meetings.

Compiled by Wayne Teal - Catchment Lead

(Some of these documents have a high file size.)

Catchment Groups/ Catchment Studies

Restoration of Whaingaroa (Raglan) Harbour - Report prepared for Northland Regional Council by Tanya Gray, TEC services 2011 (PDF, 1.3MB)

State of the Ohiwa harbour and catchment, Heather Mackenzie, Bay of Plenty Regional Council 2013 (PDF, 1.1MB)


Whangarei Harbour Catchment Group - Field trip - forestry presentation by Andy Warren, 2014 (PDF, 3.1MB)

NZ Forestry Environmental Code of Practice (PDF, 3.2MB)

Forestry in steep eroding hill country presentation, Chris Phillips Landcare research 2014 (PDF, 3.8MB)

Forest harvesting, sediment yield, and what we can do about it - Chris Phillips & Mike Marden, Landcare 2014 (PDF, 3.2MB)

Pakuratahi - Tamingimingi Land Use Study Report - Chapter 5 - Forestry effects on Sediment Yield, Hawkes Bay Regional Council (PDF, 1.1MB)

Heavy Metals

Heavy metals in fish and shellfish from Christchurch rivers and Estuary: 2010 Survey Environment Canterbury (PDF, 1.6MB)


The New Zealand mangrove review of the current state of knowledge. Auckland Regional Council Technical Publication No. TP325 2007 (PDF, 3.7MB)

Effects of mangrove removal on benthic communities and sediment characteristics at Mangawhai Harbour, northern New Zealand (PDF, 1MB)

Implications of the National Policy Statement Freshwater, Cawthron 2011 (PDF, 1.1MB)

Recreational Swimming Water Quality Programme

Agenda Item - Northland Recreational Swimming Water Quality Programme Results 2014-15 (PDF, 900KB)


Swales et al. Sediment process and mangrove expansion - Firth of Thames (PDF, 943KB)

Swales 2012 Sediment sources and accumulation rates in the Bay of Islands and implications for macro-benthic fauna mangrove and saltmarsh habitats (PDF, 2.8MB)

NIWA - Monitoring Fine Sediment Loads in Northland Rivers and Streams, 2010 (PDF, 240KB)

Swales et al 2005. Whaingaroa Harbour sedimentation and the effects of historical catchment land cover changes - NIWA (PDF, 1.1MB)

Gibbs Identifying Source Soils in Contemporary Estuarine Sediments: A New Compound-Specific Isotope Method 2007 (PDF, 463KB)


NRC shellfish gathering results 2014-2015 (PDF, 197KB)

Storm Water

Ngunguru catchment stormwater Management Plan. Contract report for Whangarei District Council, GHD 2002
(Due to the file size of this document it has been split into four parts, however these are still large files).

S1 - S6 - Ngunguru catchment stormwater Management Plan (PDF, 4.5MB)

S7 - S12 - Ngunguru catchment stormwater Management Plan (PDF, 5.5MB)

App1 - App3 - Ngunguru catchment stormwater Management Plan (PDF, 5.7MB)

App4 - App7 - Ngunguru catchment stormwater Management Plan (PDF, 2.1MB)