Technical publications and research

Technical reports 2009

1-50 / 51-100 / 101-150 

 

Year of publication/
Report number
Title of report
2009/001

TR2009/001 - Assessment of trophic state change in selected lakes of the Auckland region based on rotifer assemblages (PDF 530KB)

This report provides an assessment of the trophic state and trends of the seven lakes routinely monitored by the ARC. This assessment used an ecological indicator organism (rotifers) to infer the productivity of the lakes, thus allowing comparison with the water quality monitoring programme. The results of the two studies were similar with Lake Ototoa ranked as having the best water quality by both studies. Whilst the report indicates that six of the seven monitored lakes have degraded water quality, most of the lakes have shown no change over the duration of the study.

2009/002

TR2009/002 - A survey of the riparian characteristics of the Auckland region (PDF 290KB)

This report presents the results of a regional survey of the extent of fencing, vegetation types and stream bank erosion of riparian margins of rural streams in Auckland. The findings include that 25 per cent of rural streams have an effective fence on both banks, with similar amounts of fencing on streams in dairy and rural residential land uses.

2009/003

TR2009/003 - Whangateau Catchment and Harbour Study Review of Environmental Information for the Whangateau Harbour (PDF 2.9MB)

This report provides an overview of the environmental conditions including geophysical characteristics, environmental quality, flora and fauna present in the Whangateau harbour. It identifies threats to this ecosystem and also identifies knowledge gaps which could be further investigated.

2009/004

TR2009/004 - Whangateau Catchment and Harbour Study Review of Environmental and Socio-economic information for the Whangateau Catchment (PDF 789KB)

This report reviewed information relating to the Whangateau Catchment. The report highlights the Bio-Physical, Human Economic, Social Demographic, Planning factors, and future drivers for land use change and development relative to the catchments’ inherent values. GIS mapping and analysis has formed an integral part of these investigations, along with supporting literature and background reports.

Note: the electronic version does not include the appendices. A full electronic version including the map series is available for purchase on CD for $10.00 or hardcopy for $49.00.

2009/005

TR2009/005 - Whangateau Catchment and Harbour Study Review of Iwi and Stakeholder Information (PDF 239KB)

This report outlines the issues and concerns of the various stakeholders who affiliate themselves with the Whangateau Harbour catchment. It contains findings from interviews of iwi, local community and government stakeholders with respect to the Whangateau harbour.

2009/006

TR2009/006 - Whangateau Catchment and Harbour Study Summary and Discussion Document (PDF 937KB)

This report summarises the previous three studies’ information on the values of Whangateau, the perceived threats to those values and knowledge gaps. It provides a range of options for consideration as part of developing an implementation plan for the Whangateau including the development of a Whangateau forum.

2009/007

TR2009/007 - An overview of soil quality in the Auckland region from 1995-2001 (PDF 179KB)

The ARC participated in two national soil quality monitoring initiatives in 1995-1998 and 1999-2001. This report reviews all the data and provides a summary of results. Eighty eight sites covering different soil and land use types: dairy pasture, sheep-beef pasture, horticulture, forestry, and indigenous vegetation were assessed against seven key soil quality indicators. On an area basis, about one third (38 per cent) of the monitored area met all the suggested soil quality targets. Indigenous forests and reserves had the highest proportion of sites (60 per cent) meeting the suggested targets, and dairy pastures the lowest (19 per cent).

2009/008

TR2009/008 - Soil quality of horticultural sites in the Auckland region in 2008 (PDF 438KB)

Eighteen horticultural sites most at risk of soil quality degradation such as market gardens, arable cropping were resampled using the protocols established during earlier projects (1995-2001). Overall the current soil condition of these horticultural sites is similar to that observed in earlier sampling and remains of concern.

2009/009

TR2009/009 - Regional assessment of areas susceptible to coastal erosion (PDF 1.4MB)

This report provides a regional overview of land susceptible to coastal erosion in the Auckland region.


TR2009/009 - Regional assessment of areas susceptible to coastal erosion appendices A-J (PDF 5.1MB)

2009/010

TR2009/010 - Natural hazards and their impacts (part one) (PDF 3.8MB)

This report provides a summary of natural hazards and their impacts in the Auckland region. The report broadly describes where natural hazards occur in the region and what the frequency and magnitude of these are. The types of consequences that might be encountered from the natural hazards identified are also discussed.

TR2009-010 - Natural hazards and their impacts (part two) (PDF 2.8MB)
This report provides a summary of natural hazards and their impacts in the Auckland region. The report broadly describes where natural hazards occur in the region and what the frequency and magnitude of these are. The types of consequences that might be encountered from the natural hazards identified are also discussed.
2009/011

TR2009/011 - ARC LakeSPI (PDF 2.9MB)

This report provides an assessment of the ecological condition of 32 lakes in the Auckland Region using an ecological index (LakeSPI) based on aquatic plants. The index scores ranged widely from 0-90 (on a scale of 0-100), with six lakes considered to be in excellent ecological condition (>60) based on this index. Of the 19 lakes with historical surveys with which to allow trend analysis, seven lakes appeared to be stable, six improving and six declining. Only one lake was in a 'pristine' condition. Comparisons with LakeSPI results obtained from around New Zealand showed that a high number of lakes in the Auckland Region have been colonised by the worst invasive aquatic weeds (Egeria, Hornwort and Lagarosiphon).

2009/012

TR2009/012 - Changes in soil state and disturbance from 1999-2007 (PDF 350KB)

There has been a net decrease in stable, erosion-prone surfaces and a net increase in eroded and eroding surfaces between 1999 and 2007, up from nine to 13 per cent of rural land. Most of the change is attributed to grazing pressure, cultivation and vegetation harvest.

2009/013

TR2009/013 - Vegetation associated with land uses in the Auckland region (PDF 195KB)

Nine broad uses (intensive, dairy, drystock, forest plantation, natural forest, natural scrub, exotic scrub, coastal grass and scrub, wetlands and mangrove swamps) are assessed for primary and secondary vegetation. Most land under rural use has a dense primary cover; highest for dairy pasture (76 per cent), next-highest for drystock pasture (72 per cent), somewhat lower for forest plantations (64 per cent) and intensive uses (59 per cent). Vegetation is not by itself an indicator of soil state, though extent to which it has been modified becomes relevant as an indicator of pressure on soil, from either land use or natural disturbance.

2009/014

TR2009/014 - Vegetation soil conservation cover in the Auckland region (PDF 181KB)

Two measures of soil conservation requirements are reported. Firstly the percentage of land that is stable with primary vegetative cover and secondly the extent of secondary dense, woody vegetation within the region.

2009/016

TR2009/016 - Soil state in the Auckland region (PDF 269KB)

This report summaries the analysis of 5277 one hectare sample areas spaced at 1km intervals across the Auckland region exposed soil surfaces. The sample survey results show that at 2007 3.3 per cent of the Auckland region is bare through some form of disturbance (land use or natural processes), which equates to 16,525 hectares.

2009/018

TR2009/018 - Methods used to survey soil state in the Auckland region (PDF 173KB)

This report summarises methods used for a point sample survey of soil state from 2007 region-wide aerial photography for the Auckland region. The report defines terms used in the point sample survey e.g. stable, erosion-prone, eroded and eroding, extensively disturbed; land use-related disturbance, natural disturbance, intact soil, disturbed soil, vegetated soil, bare soil, rural land use, non-rural land use.

2009/019

TR2009/019 - Subtidal reef ecological monitoring 1999-2008 (part one) (PDF 3.5MB)

The Long Bay Marine Monitoring Programme was initiated in 1998 with the objective of detecting and documenting the impact of increased sedimentation associated with urban development on the subtidal marine environments of Long Bay. Results indicate that the subtidal biota has not been impacted in any significant way since the start of the monitoring programme.


TR2009/019 - Subtidal reef ecological monitoring 1999-2008 (part two) (PDF 3.2MB)

The Long Bay Marine Monitoring Programme was initiated in 1998 with the objective of detecting and documenting the impact of increased sedimentation associated with urban development on the subtidal marine environments of Long Bay. Results indicate that the subtidal biota has not been impacted in any significant way since the start of the monitoring programme.

2009/020

TR2009/020 - Meola reef ecological monitoring 2001-2008 (PDF 4.5MB)

This report updates the results of the Meola Reef Monitoring Programme established in 2001.

2009/021

TR2009/021 - Field analysis of chemicals of emerging environmental concern in Auckland (PDF 2.4MB)

This report is an analysis of estuarine sediments, in the greater Auckland region, for metals and emerging chemicals of concern (ECCs). A list of 37 ECCs were investigated to cover the major classes of chemicals reported in a recent ARC review of organic ECCs (ARC Technical Report TR2008/028 Organic chemicals of Emerging Environmental Concern in Use in Auckland - Literature Review 1995-2005, Ahrens 2008), and included surfactants, flame retardants, plasticisers, estrogens, antifoulants and pesticides.

2009/022

TR2009/022 - Soil erosion in Auckland’s hill country - a survey of fresh and recent erosion in 1999 (PDF 230KB)

This previously unpublished report presents findings from a survey of erosion on hill country soils in the Auckland region. The survey found that erosion is a natural phenomenon but the incidence varies with land use.

2009/023

TR2009/023 - Rural land use on Aucklands soils - a survey of current land use in 1999 (PDF 275KB)

Findings from a survey of rural land use in Auckland are presented. Results of this previously unpublished survey confirmed the diversity of soil types and variety of land uses influences the sustainable use of soil resources in the Region.

2009/024

TR2009/024 - Methods used to survey Auckland’s soil erosion - hill country, sand country and rural land use in 1999 (PDF 296KB)

This report summarises methods used to survey soil erosion as reported in ARC Technical Reports TR2009/022, 023 and 025.

2009/025

TR2009/025 - Methods used to survey Auckland’s soil erosion - hill country, sand country and rural land use in 1999 (PDF 234KB)

This previously unpublished report presents findings from a survey of erosion on sand country soils in the Auckland region.

2009/028

TR 2009/028 - An assessment of the lengths of permanent, intermittent and ephemeral streams in the Auckland region (PDF 1.3MB)

This report utilises a recent LiDAR survey of the Region to estimate the extent of streams. Previous estimates of stream length in Auckland were underestimating the actual number. This report updates our best estimate of stream length in the region to 16,650km.

2009/035

TR2009/035 - Fall velocities of stormwater sediment particles - literature review (PDF 739KB)

This report documents a literature review of fall velocities of stormwater sediment particles, which is a key parameter in the design of stormwater treatment devices that use particle settling.

2009/036

TR2009/036 - Mapping of impervious surface cover within the Auckland Region (PDF 1.1MB)

Impervious surfaces can be roads, parking lots, roofs, compacted soil or compacted gravel. Such surfaces modify the surface hydrology, altering the flows and can change the physical and chemical properties of surface water. Impervious surfaces have been mapped for the greater Auckland metropolitan area for the years 2000 and 2008 and this report outlines the methods and results of the mapping.

2009/038

TR2009/038 - Erosion parameters for cohesive sediment in Auckland streams (PDF 674KB)

This report documents field work undertaken in the Auckland region to assess Auckland-specific stream erosion parameters. Local parameter values are used to improve stormwater and stream management guidelines that will lead to a decrease in stream erosion.

2009/039

TR2009/039 - Mahurangi Harbour Biological Monitoring Programme (PDF 1.9MB)

This report provides information describing the data collected During the first year of monitoring in the Mahurangi Harbour for the period 1994 to 1995.

This report is part of a series of reports that were commissioned during the period 1993-1999 that were used to support the establishment of the Mahurangi Action Plan. They are being made available following a review of technical information.

2009/040

TR2009/040 - Mahurangi Harbour Soft-Sediment Communities (PDF 1.4MB)

This report describes baseline ecological data in the Mahurangi harbour and predicts the effects of harbour and catchment development on resident infauna.

This report is part of a series of reports that were commissioned during the period 1993-1999 that were used to support the establishment of the Mahurangi Action Plan. They are being made available following a review of technical information.

2009/041

TR2009/041 - Mahurangi Estuary numerical modelling (PDF 1.5MB)

This report describes the development and testing of computer models for the movement and circulation of water, the mixing processes and solute and sediment transport.

This report is part of a series of reports that were commissioned during the period 1993-1999 that were used to support the establishment of the Mahurangi Action Plan. They are being made available following a review of technical information.

2009/042

TR2009/042 - Mahurangi land-use scenario modelling (PDF 905KB)

This report describes the use of the BNZ catchment model to predict sediment erosion rates within the Mahurangi catchment and sediment delivery rates to the estuary for different land-use scenarios. Sedimentation rates within the estuary are then predicted using the estuary model.

This report is part of a series of reports that were commissioned during the period 1993-1999 that were used to support the establishment of the Mahurangi Action Plan. They are being made available following a review of technical information.

2009/044

TR2009/044 - Ranking of Auckland soil’s susceptibility to degradation (PDF 211KB)

This previously unpublished report provides background information used in the development of the ARC’s State of the Environment land monitoring programme.

2009/045

TR2009/045 - Low impact design vs conventional development (PDF 928KB)

This report addresses a literature review of developer related costs and profit for low impact design (LID) versus conventional development approaches. Costs are limited to examination of construction costs. Other economic cost methods include life cycle cost analysis and benefit-cost analysis, which are not contained in this report.

2009/046

TR2009/046 - Contaminant Accumulation in the Open Coastal Zone (PDF 239KB)

This study provides an overview of sediment settling characteristics from urban stormwater discharging to an open coastal environment and provides recommendations for monitoring the effects of stormwater discharging to that environment.

This report is part of a series that were commissioned to characterised urban stormwater discharges. The reports were used to support the establishment and ongoing operation of the Regional Discharges Project.

2009/047

TR2009/047 - Modification of the Model to Assess Ecosystem Health Using Benthic Communities (PDF 73KB)

This report describes modifications made to the Benthic Health Model developed in 2002 to assess the ecosystem health of marine benthic communities.

This report is part of a series that were commissioned to characterised urban stormwater discharges. The reports were used to support the establishment and ongoing operation of the Regional Discharges Project.

2009/048

TR2009/048 - Benzene,1, 3 Butadiene and Other VOCs in Auckland (PDF 1.3MB)

This report summarises hydrocarbon measurements that have been undertaken in Auckland over the past 10 years.

2009/050

TR2009/050 - Sediment Quality Guidelines for the Regional Discharges Project (PDF 439KB)

This report evaluates a series of possible guideline values for managing contaminants in sediment in marine receiving environments within urban or peri urban catchments.

This report is part of a series that were commissioned to characterised urban stormwater discharges. The reports were used to support the establishment and ongoing operation of the Regional Discharges Project.

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Year of publication/
Report number
Title of report
2009/052

TR2009/052 - Auckland Sustainable Homes Assessment, Part 1 Insulation and Clean Heat Appliances (PDF 1.5MB)

This report assesses the sustainability of the Auckland housing stock in terms of minimum levels of insulation and clean and efficient home heating appliances. As part of the Auckland Sustainable Framework (ASF), the ARC is investigating the role that a 'Sustainable Homes' programme could play to address the challenges of climate change, unsustainable natural resource use, population growth, social disadvantage and degraded air quality.

2009/053

TR2009/053 - Pollution Gradient Classification (PDF 272KB)

This report provides guidance on how to rank tidal and harbour sites based on data collected by a number of agencies in the Auckland Region. The site evaluations presented in the report were used to develop the Benthic Health Model.

This report is part of a series that were commissioned to characterised urban stormwater discharges. The reports were used to support the establishment and ongoing operation of the Regional Discharges Project.

2009/055

TR2009/055 - Kaipara Harbour Sediments Information Review (PDF 2.5MB)

A review of existing literature relating to sedimentation and sediment composition in the Kaipara Harbour is presented. This report was commissioned jointly between the Auckland Regional Council and Northland Regional Council.

2009/056

TR2009/056 - Pesticide use in the Mahurangi catchments - assessment of impact on the aquatic environment (PDF 980KB)

Pesticide use in the Mahurangi catchment was assessed through a representative survey with results presented in this report.

This report is part of a series of reports that were commissioned during the period 1993-1999 that were used to support the establishment of the Mahurangi Action Plan. They are being made available following a review of technical information.

2009/057

TR2009/057 - Optical water quality of the Mahurangi Estuarine System (PDF 3.6MB)

A study of the water colour and clarity of the Mahurangi Harbour and Estuary is reported. The goal of the study was to determine the sensitivity of the estuary to catchment landuse.

This report is part of a series of reports that were commissioned during the period 1993-1999 that were used to support the establishment of the Mahurangi Action Plan. They are being made available following a review of technical information.

2009/058

TR2009/058 - Numerical modelling of Warkworth sewage discharge to Mahurangi Estuary (PDF 7MB)

The impacts of two discharge options for the Warkworth treated sewage discharge on the concentrations of in the Mahurangi estuary are presented.

This report is part of a series of reports that were commissioned during the period 1993-1999 that were used to support the establishment of the Mahurangi Action Plan. They are being made available following a review of technical information.

2009/059

TR2009/059 - Mahurangi Estuary Numerical Modelling - Stormwater Overflow Events (PDF 7.3MB)

This report gives details of modelling the dispersion of storm overflow discharges within the Mahurangi River. Results are presented for varying events and durations.

This report is part of a series of reports that were commissioned during the period 1993-1999 that were used to support the establishment of the Mahurangi Action Plan. They are being made available following a review of technical information.

2009/060

TR2009/060 - Modelling sediment loads to the Mahurangi Estuary (PDF 1.5MB)

The report presents computer simulations that predict sediment and nutrient loadings to the Mahurangi harbour, using detailed information on its catchment and long term climate record.

This report is part of a series of reports that were commissioned during the period 1993-1999 that were used to support the establishment of the Mahurangi Action Plan. They are being made available following a review of technical information.

2009/061

TR2009/061 - Mahurangi Estuary - Sedimentation history and recent human impacts (PDF 7.7MB)

The sedimentation history and present day sedimentation processes in the Mahurangi Harbour are reported to determine how the harbour has responded to changes in sediment load following changing landcover in the catchment.

This report is part of a series of reports that were commissioned during the period 1993-1999 that were used to support the establishment of the Mahurangi Action Plan. They are being made available following a review of technical information.

2009/062

TR2009/062 - Redwoods Stream sediment yield (PDF 582KB)

Sediment yields from Redwoods Stream, Mahurangi are compared before and during timber harvesting

This report is part of a series of reports that were commissioned during the period 1993-1999 that were used to support the establishment of the Mahurangi Action Plan. They are being made available following a review of technical information.

2009/064

TR2009/064 - Analysis of sediment yields within Auckland Region (PDF 3.4MB)

Sustainable management of the Auckland region’s land and aquatic environment requires ongoing monitoring of various environmental parameters. Measurements of suspended sediment yields during storms at nine basins in Waitemata Formation terrane under various land uses in the Auckland region were analysed to determine event sediment yields and mean annual sediment yields. The site data and results are reported in this publication.

2009/072

TR2009/072 - Review of hydrologic properties of soils in the Auckland region (PDF 299KB)

This report provides technical information on soils within the Auckland region to support the revision of Technical publication 108, Guidelines for Stormwater Runoff Modelling in the Auckland Region.

2009/073

TR2009/073 - Hydrological effect of compaction associated with Earthworks (PDF 1.5MB)

This report assesses the implication of soil compaction associated with earth work for large urbanised greenfield sites in Auckland. It includes a review of literature on physical characteristics of urban soils, particularly those affecting their capacity to mitigate stormwater run-off issues.Reviews the basis of the Soil Conservation Service (SCS) method as amended for Auckland.Strategies are also recommended that would increase the accuracy of the SCS approach to modelling run-off, and methods of managing soils and pervious open space in urban areas that would increase their ability to mitigate urban stormwater run-off issues.

2009/074

TR2009/074 - Identification of permeable soils within the Waitemata Formation (PDF 1.9MB)

This report identifies Hydrological Class A (high to moderate permeability) soils within the dominant Class C (low permeability) soils on Waitemata Formation sedimentary rocks in the Auckland region.

2009/077

TR2009/077 - Measurable bottom line objectives for integrated catchment management plans (short version) (PDF 299KB)

The report provides guidance on how to use a multi-criteria analysis to evaluate options and how to set measurable objectives for Integrated Catchment Management Plans (ICMP). It shows a practical way to link ICMP outcomes with the four wellbeings under the RMA and LGA.

2009/078

TR2009/078 - Measurable bottom line objectives for integrated catchment management plans (extended version) (PDF 415KB)

The report provides guidance on how to use a multi-criteria analysis to evaluate options and how to set measurable objectives for Integrated Catchment Management Plans (ICMP). It shows a practical way to link ICMP utcomes with the four wellbeings under the RMA and LGA. This document provides a greater level of detail and background research about the methodology than TR2009/077.

2009/083

TR2009/083 - Landscape and ecology values within stormwater management (PDF 2.7MB)

This award winning report is a review of ARC's TP10, with specific regard to promoting values for landscape and ecology in design of stormwater management devices. The documents' structure is based on three levels of specificity, provided as principles, specifications and recommendations.

2009/084

TR2009/084 - Fish passage in the Auckland region - a synthesis of current research (PDF 4.4MB)

This technical report was commissioned as an updated version of Technical Publication 131 - Fish Passage Guidelines for the Auckland Region, which was published in June 2000. It incorporates the most current research on fish passage issues and offers a range of options for the construction of fish-friendly instream structures.

2009/085

TR2009/085 - Intergenerational responses of aquatic biota to low level contamination in urban streams (PDF 552KB)

This report provides a tool for detecting the effects of chronic, low-level contamination in streams on multiple generations of aquatic biota, using changes in genetic structure as a marker. It combines both field and laboratory experiments ranging from acute (4 days) to chronic (38 days) exposure periods. Effects on both adult and juvenile populations produced during the experiments and have assessed both physiological and reproductive measures of fitness. Collectively these results provide strong evidence for selection effects of stormwater resulting in heritable shifts in genetic composition.

2009/086

TR2009/086 - Use of Microbial Biofilms to Monitor the Efficacy of a Stormwater Treatment Train (PDF 2.2MB)

This report provides an assessment of the efficacy of stormwater treatments devices in operation at the Albany Park and Ride complex using a novel ecological indicator. The bacterial community within the biofilm layer was used as an ecological indicator, taking advantage of recent advantages in DNA analysis techniques. This approach allows the quality of water in a system to be measured where traditional ecological indicators (invertebrates and fish) are not present. The approach provided valuable results, indicating the biofilm technique has value in monitoring programmes and that the stormwater devices at the Park and Ride complex are having a beneficial effect of the quality of water.

2009/091

TR2009/091 - An evaluation framework for the ICMP programme (PDF 1.6MB)

A key deliverable of the project is a process for assessing ICMPs. This is the first step in a major exercise in building the capacity of the region’s wider catchment management industry in line with New Zealand best planning practice. Logic models are a graphical representation of the main elements of a programme. They describe in concise terms how a programme operates, and illustrate the outcomes and impacts it aims to deliver or support. This framework has four logic models, one describing the workstream as a whole, with the other three describing the main groups of activities that contribute to the workstream’s overall success. These three groups of activities relate to: promoting good ICMPs; funding the preparation of ICMPs; and building awareness, relationships and alignment amongst ICMP stakeholders.

2009/092

TR2009/092 - Integrating catchment and coastal management – A survey of local and international best practice (PDF 2.2MB)

This literature review evaluated how catchment planning and coastal planning can be linked with each other, when it may be appropriate and at what level to do so. The review is based on national and international best practice.

2009/095

TR2009/095 - Hydrology of Wetlands (PDF 4.1MB)

The main objective was to determine whether wetlands are more effective at controlling stormwater peak flows and reducing flow volumes than ponds. This report accompanies a coupled energy and water balance spread-sheet model that has been applied to two wetlands. It describes the model including its organisation into sub-models, parameters and calculations. As the model has not been calibrated, the findings listed are tentative.

2009/096

TR2009/096 - Hydraulic Effects of Riparian Plantings (PDF 2.7MB)

The replanting of stream banks in native vegetation has been encouraged by the Auckland Regional Council as contributing to improving freshwater habitats. To ensure that a flooding hazard is not created by providing environmental enhancement, the effect of riparian planting on design peak flows must be quantified. This technical report contains the results of an investigation into the hydraulic effects of such plantings along a closely monitored test reach of the Opanuku Stream in west Auckland.

2009/097

TR2009_097 - Organic contaminants in sentinel shellfish - 2007 data (PDF 139KB)

Data from ARC’s monitoring of sentinel shellfish in the Manukau and Waitemata harbours is presented for 2007. Samples were analysed for organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), and polycyclic aromatic hydrocarbons (PAHs).

2009/098

TP2009/098 - Marine Sediment Monitoring Programme: 2007 Results (PDF 1.5MB)

This report describes the concentrations of contaminants found in marine sediments at a selection of Auckland’s estuaries, harbours and some beaches. Data from 1998 to 2007 is presented and is part of an ongoing long term monitoring programme.

2009/099

TR2009/099 - Marine water quality data report 2007 (PDF 466KB)

This report summarises water quality monitoring of marine waters in our estuaries, harbours and open coastal areas. The data are presented in tabular form as well as graphically to illustrate differences in the water quality parameters that are monitored at each of the 27 sites. Information obtained from the saline water quality programme was reported in the 2009 State of the Auckland Region report.

2009/100

TR2009/100 - Marine water quality data report 2008 (PDF 465KB)

This is a continuation of the annual data report series. For the 2008 year, differences among sites were apparent with variations in individual water quality parameters reflecting the degree of mixing and dilution at site along with terrestrial inputs. Sheltered sites found in estuaries and harbours close to the city had higher concentrations of nutrients compared to the more exposed east coast sites.

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Year of publication/
Report number
Title of report
2009/101

TR2009/101 - A Genuine Progress Indicator for the Auckland Region: Valuation Methodology (PDF 920KB)

Like GDP or Gross Domestic Product, the Genuine Progress Indicator (GPI) is a measure of economic progress. The difference is that GPI also takes into account social and environmental costs as well as the benefits of growth. The Auckland regional GPI takes into account eighteen components, ranging from unemployment, crime, overwork, loss of soils, to loss of air quality. Every component represents either an addition to, or subtraction from, the total personal consumption expenditure figures for each year. This report explains the methodology behind the first ever Auckland regional GPI in some detail.

2009/102

TR2009/102 - River water quality annual report 2007 (PDF 765KB)

This report provides a summary of the water quality data collected from the ARC’s monitoring network of 27 rivers. The data is presented graphically, in tabular form and, for the first time, was used to produce a water quality index for each site. The index allowed sites to be ranked and a water quality class to be assigned to each site. In 2007, the Cascades Stream in the Waitakere Ranges Regional Park had the best water quality and the Otaki Creek, a tributary of the Tamaki River, had the poorest water quality. The report also detailed programme changes that were made during 2007.

Neale, M.W. 2009. State of the Environment Monitoring: River Water Quality Annual Report 2007. Auckland Regional Council Technical Report 2009/102.

2009/107

TR 2009/107 - Auckland waste stocktake and strategic assessment 2009 (PDF 1.6MB)

The report collates regional waste data and information from many sources including territorial authorities, landfill operators, transfer stations, recyclers, large waste generating businesses and the ARC. The data has been evaluated to gain an understanding of regional waste flows including which parts of the waste stream are recycled and recovered, the opportunities that exist to increase reuse, recycling and recovery, mechanisms to enable those opportunities to be realised (including the contestable Waste Levy Fund) and significant barriers to future waste minimisation in the region.

2009/108

TR2009/108 Review of toxins in the sea slug and coincidence of dog deaths along Auckland beaches (PDF 5.6MB)

Through July and August 2009, there were a number of unexplained dog deaths and reported mortality of penguins, dolphins and pilchards within, and around the Waitemata Harbour and parts of the broader Hauraki Gulf. This report describes the results of a multi-agency investigation and response to these incidents, including the identification of the bio-toxin tetrodotoxin (TTX) in sea slugs.

Hauraki Gulf Marine Toxin Response - FAQs (PDF 97KB)

This is a selection of frequently asked questions about the investigation and technical report.

What you need to know about sea slugs (PDF 43KB)

Find the answers to some common questions and where to go for more information about sea slugs on Auckland beaches.

2009/109

TR2009/109 - Central Waitemata Harbour contaminant study - rainfall analysis (PDF 1MB)

This report belongs to the Central Waitemata Harbour Contaminant Study series. It describes the choice and derivation of the long-term rainfall record for the study. The main aim was to model contaminant (zinc, copper) and sediment accumulation within the CWH for the purposes of, amongst other things, identifying significant contaminant sources, and testing efficacy of stormwater treatment and contaminant source control.

2009/110

TR 2009/110 Southeastern Manukau Harbour and Pahurehure Inlet Contaminant Study: Rainfall Analysis (PDF 1.1MB)

This report is part of the Southeastern Manukau Harbour Contaminant Study series. It describes the choice and derivation of the long-term rainfall record for the study. The aim of the study was to model contaminant (zinc, copper) and sediment accumulation in the Southeastern Manukau Harbour to identify significant contaminant sources and the testing efficacy of stormwater treatment and contaminant source control.

2009/111

TR2009/111 - The impacts of stormwater in Auckland's aquatic receiving environment - a review of information 2005-2008 (PDF 2.1MB)

This report provides a summary of literature and investigations that were completed during the period 2005 to 2008. The report focuses on investigations that target the assessments of Auckland’s aquatic receiving environments.

2009/112

TR2009/112 - Environmental condition and values of Manukau Harbour (PDF 5.2MB)

This report reviews information on the physical, chemical and ecological characteristics of the Manukau Harbour receiving environment.

2009/113

TR2009/113 - Auckland Regional Council tsunami inundation study (PDF 5.7MB)

This report outlines the potential inundation threat in the Auckland region from a distant source tsunami event. A possible tsunami produced by a MW 9.5 earthquake centred off the coast of Chile was the scenario chosen to perform inundation modelling, which is undertaken for current and future higher sea levels.

2009/114

TR2009/114 - Organic Contaminants in Sentinel Shellfish 2006 (PDF 817KB)

Data from ARC’s monitoring of sentinel shellfish in the Manukau and Waitemata harbours is presented for 2006. Samples were analysed for organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), and polycyclic aromatic hydrocarbons (PAHs).

2009/115

TR2009/115 - Organic Contaminants in Sentinel Shellfish 2008 (PDF 945KB)

Data from ARC’s monitoring of sentinel shellfish in the Manukau and Waitemata harbours is presented for 2008. Samples were analysed for organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), and polycyclic aromatic hydrocarbons (PAHs).

2009/116

TR2009/116 - Short-term behavioural responses of selected benthic invertebrates inhabiting muddy habitats to burial by terrestrial clay (PDF 140KB)

This report evaluates short term behavioral responses of marine macrofauna, living in muddy sediments, to the deposition of a slurry of terrigenous clay. In general, levels of stress and mortality of the macrofauna increased with time, probably due to reduced access to food and oxygen at the surface of the clay and the changing chemical composition of the original sediment. Larger, more-mobile animals were less affected than small and slow moving ones.

2009/117

TR2009/117 - Effects of suspended sediment concentrations on suspension and deposit feeding marine microfauna (PDF 332KB)

This report is a continuation of research by the Auckland Regional Council and NIWA on the effects of increased sediment loading in estuaries and concentrates on the effects of increased suspended sediment concentrations. Results of the experiments undertaken emphasise the negative effects that suspended sediment concentrations may have on common marine macrofaunal species within the Auckland Region.

2009/119

TR2009/119 - Richardson Road study: Measurement and sampling of runoff and catchpit solids (PDF 3.9MB)

This report describes the methods and results of a study to measure the quantity and quality of road runoff and catchpit solids at Richardson Rd in Auckland city. The primary aim of the study was to collect data which will allow the loads of solids, copper, lead, zinc and total petroleum hydrocarbons (TPHs) entering roadside catchpits to be estimated.

2009/120

TR2009/120 - Mahurangi Harbour ecological monitoring programme - report on data collected from July 1994 to Jan 2009 (PDF 877KB)

Ecological results from the last fifteen years of monitoring the Mahurangi Harbour are presented and discussed in this report.

2009/121

TR2009/121 - Manukau Harbour ecological monitoring programme - report on data collected up until Feb 2009 (PDF 720KB)

This report presents the results of ecological monitoring of the Manukau Harbour from 1987 to 2009.

2009/122

TR2009/122 - Quantification of catchpit sediments and contaminants – literature review PDF 1.3MB)

This report is a literature review that compiles information about sediment characteristics and contaminants that are collected in catchpits. The literature was sourced both locally and internationally

2009/123

TR2009/123 - Quantification of catchpit sediments and contaminants – data collection (PDF 1.9MB)

This is a data collection report that compiles information about sediment characteristics and contaminants that are collected in catchpits. Samples of solids were collected from 30 roadside catchpits in Auckland.

2009/125

TR2009/125 - Sediment monitoring plan for the Auckland Region (PDF 697KB)

Fine sediment discharge from streams to coastal waters is a significant environmental issue for the Auckland region. Managing this to ensure sustainable development requires a robust monitoring plan to improve understanding of the sediment sources, quantify the amount of sediment coming off the land at the catchment and regional scale, and assess the effectiveness of erosion mitigation policies. This report develops a draft design for such a stream sediment monitoring programme.

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