A summary report of information for the Hokianga Harbour catchment using results from a regional assessment of Northland’s steady state water quality.
Published: 18 Jan 2021
A report on monitored sediment metal and nutrient concentrations in surficial sediments in the Whangārei Harbour and Bay of Islands.
Published: 18 Jan 2017
Sediment sources and accumulation rates in the Bay of Islands and implications for macro-benthic fauna, mangrove and saltmarsh habitats.
Published: 15 Aug 2012
This report presents the results from monitoring undertaken at 42 sites by the council between January 2010 and December 2014.
Published: 02 Oct 2017
A Far North Harbours water and sediment quality investigation.
Published: 22 Oct 2013
Interpreting Northland’s Coastal Water Quality Monitoring Results Under Different Tide Conditions : Cornelisen, Jiang and Griffiths - 2011.
Published: 11 Sep 2014
A report on the sediment quality and ecological status of the Kaipara Harbour.
Published: 29 Jan 2016
Patterns and rates of recent sedimentation and intertidal vegetation changes in the Kaipara Harbour.
Published: 02 Jul 2012
Key findings of a survey of three marine significant ecological areas (SEAs) in the Mangawhai Estuary.
Published: 03 Feb 2020
A report on the sediment quality and ecological status of the Mangonui Estuary.
Published: 06 Dec 2016
A report identifying sources of faecal contamination in coastal waters and shellfish in Northland's waters in 2010.
Published: 22 Nov 2012
A report on the sediment quality and ecological status of the Ngunguru Estuary.
Published: 06 Dec 2016
- Ngunguru Estuary Report (Website).pdf (2675 KB)
A Department of Conservation publication containing maps of marine habitats for Northland.
Published: 23 Jul 2010
Dune Restoration Strategy for the Opononi-Omapere shoreline, Hokianga Habour
Published: 01 Aug 2008
A review of existing coastal water quality classifications and recommendations for inclusion in Northland’s new Regional Plan.
Published: 02 Oct 2017
A survey report and detailed habitat assessment of the Ruakaka estuary.
Published: 19 Nov 2019
A report on the health of the Ruakaka Estuary.
Published: 31 Oct 2017
- Ruakaka EMP Report 2008-2010.pdf (1546 KB)
This report describes an investigation into the loss of seagrass meadows from the eastern Bay of Islands.
Published: 25 Oct 2012
- Eastern BOI Seagrass Report (NIWA).PDF (1584 KB)
Feasibility study to investigate the replenishment/reinstatement of seagrass beds in Whangārei Harbour.
Published: 01 Sep 2004
- Seagrass study - phase 1 (288 KB)
- Seagrass study - phase 2 (950 KB)
- Seagrass study - decision making document (673 KB)
Presentations on studies of major sediment sources by land use and sub-catchment.
Published: 08 May 2015
Results from coastal water quality monitoring undertaken by the council since January 2000 up to December 2010.
Published: 02 Dec 2014
This report was commissioned by the regional council and produced by NIWA in 2003.
Published: 25 Sep 2013
A NIWA report on the pre and post-human tsunami record for the Northland Region.
Published: 05 Jun 2006
- Baseline Tsunami Report (1056 KB)
Northland Regional Council contracted NIWA to undertake an initial study on the risk of tsunami inundation facing communities in the Northland Region.
Published: 14 Sep 2011
- Cover and Table of Contents.pdf (52 KB)
- Executive Summary and Introduction.pdf (47 KB)
- 2 Tsunami Source Details.pdf (97 KB)
- 3 Modelling tsunami inundation.pdf (1253 KB)
- 4 Results.pdf (37 KB)
- 4.1 Outputs.pdf (39 KB)
- 4.2 South American event.pdf (1097 KB)
- 4.3 Subduction zone events.pdf (37 KB)
- 4.3.2 Mw8.5 Tonga Kermadec subduction zone.pdf (1130 KB)
- 4.3.3 Mw9.0 Tonga Kermadec subduction zone.pdf (1136 KB)
- 4.4 Ahipara Inundation Maps South American tsunami.pdf (599 KB)
- 4.4.2 Ahipara Inundation Maps Mw8.5 Tonga Kermadec.pdf (601 KB)
- 4.4.3 Ahipara Inundation Maps Mw9.0 Tonga Kermadec.pdf (579 KB)
- 4.5 Taipa Inundation Maps South American tsunami.pdf (329 KB)
- 4.5.2 Taipa Inundation Maps Mw8.5 Tonga Kermadec.pdf (331 KB)
- 4.5.3 Taipa Inundation Maps Mw9.0 subduction zone.pdf (342 KB)
- 5 Discussion.pdf (40 KB)
- 6 References.pdf (44 KB)
- 7 Appendix I.pdf (38 KB)
- 7.1 Appendix I Figs A1-A6.pdf (186 KB)
- 7.2 Appendix I Table A1.pdf (41 KB)
- 7.3 Appendix I Figs A7-A11.pdf (65 KB)
- 8 Appendix A1 (part 1).pdf (1429 KB)
- 8 Appendix A1 (part 2).pdf (1409 KB)
NIWA report showing the results of a computer modelling study which attempts to predict flooding that would result from a tsunami in Northland.
Published: 21 Jul 2010
- Cover and Contents page.pdf (51 KB)
- 1 Introduction.pdf (45 KB)
- 2 Tsunami source details.pdf (1) (97 KB)
- 3 Modelling tsunami inundation.pdf (1) (1254 KB)
- 4 Inundation results.pdf (40 KB)
- 4.2 Ruakaka.pdf (950 KB)
- 4.3 Paihia.pdf (883 KB)
- 4.4 Marsden Point.pdf (862 KB)
- 4.5 Russell.pdf (763 KB)
- 4.6 Mangawhai.pdf (1001 KB)
- 4.7 Tutukaka.pdf (909 KB)
- 4.8 Ngunguru.pdf (1286 KB)
- 4.9 Tokerau Beach.pdf (822 KB)
- 4.10 Waitangi.pdf (852 KB)
- 4.11 Matauri Beach.pdf (726 KB)
- 4.12 Waipu Cove.pdf (921 KB)
- 4.13 Pataua South.pdf (799 KB)
- 4.14 Matapouri.pdf (832 KB)
- 4.15 Whananaki.pdf (879 KB)
- 5 Discussion.pdf (1) (43 KB)
- 4.16 Oakura and Ohawini Bays.pdf (674 KB)
- 6 References.pdf (1) (44 KB)
NIWA report showing the results of a computer modelling study which attempts to predict flooding that would result from a tsunami in Northland.
Published: 21 Jul 2010
- Cover and Contents page.pdf (1) (58 KB)
- 1 Executive Summary and Introduction.pdf (52 KB)
- 2 Tsunami source details.pdf (2) (97 KB)
- 3 Modelling tsunami inundation.pdf (2) (775 KB)
- 4 Inundation results.pdf (1) (40 KB)
- 4.2 Bland Bay Whangaruru.pdf (799 KB)
- 4.3 Opua Bay of Islands.pdf (961 KB)
- 4.4 Mangonui Doubtless Bay.pdf (873 KB)
- 4.5 East Beach Houhora Pukenui.pdf (1002 KB)
- 4.6 Helena Bay Whangaruru.pdf (808 KB)
- 4.7 Tauranga Bay Whangaroa.pdf (779 KB)
- 4.8 Taupo Bay Whangaroa.pdf (760 KB)
- 4.9 Coopers Beach Doubtless Bay.pdf (909 KB)
- 4.10 Langs Beach Bream Bay.pdf (736 KB)
- 4.11 Te Ngaire Whangaroa.pdf (686 KB)
- 4.12 Cable Bay Doubtless Bay.pdf (799 KB)
- 4.13 East Beach Rangiputa.pdf (556 KB)
- 4.14 Hihi Doubtless Bay.pdf (687 KB)
- 4.15 Dargaville Ruawai.pdf (1575 KB)
- 4.16 Omapere.pdf (772 KB)
- 4.17 Arrival times.pdf (39 KB)
- 5 Discussion.pdf (2) (42 KB)
- 6 Project Overview and Conclusions.pdf (45 KB)
- 7 References.pdf (45 KB)
NIWA report showing the results of a modelling-based assessment of tsunami hazard for the Whangarei Harbour region.
Published: 07 Apr 2011
- Cover to Introduction.pdf (231 KB)
- 2 Tsunami source details.pdf (3) (396 KB)
- 3 Modelling tsunami inundation.pdf (3) (176 KB)
- 4 Inundation results.pdf (2) (937 KB)
- 4.3 Marsden Bay.pdf (510 KB)
- 4.4 Takahiwai.pdf (507 KB)
- 4.5 Oakleigh.pdf (595 KB)
- 4.6 Otaika.pdf (543 KB)
- 4.7 Whangarei.pdf (801 KB)
- 4.8 Bream Head.pdf (485 KB)
- 4.9 Arrival times.pdf (171 KB)
- 5 Discussion.pdf (3) (187 KB)
- 6 Project overview and conclusions.pdf (1) (254 KB)
- 7 References.pdf (1) (146 KB)
A tsunami source investigation for the Northland, Auckland, Waikato and Bay of Plenty regions.
Published: 07 Aug 2006
- Tsunami Source Study (2746 KB)
A report on the sediment quality and ecological status of the Waitangi Estuary.
Published: 29 Jan 2016
A report on the sediment metal and nutrient concentrations in surficial sediments in the Whangārei Harbour and Bay of Islands.
Published: 15 Feb 2016
A report on the sediment quality and ecological status of the Whangārei Harbour.
Published: 29 Jan 2016
Sediment accumulation rates and present-day sediment sources in the Whangārei Harbour system.
Published: 18 Jul 2013
An assessment of the impacts of stormwater outfalls located in waterways draining into the Whangārei Harbour.
Published: 10 Sep 2020