Stormwater seminars
Abstracts and presenter profiles - sessions 3 & 4
Presentations, abstracts and presenter profiles on this page include:
Bodo Hellberg
Technical Publication 108 update and new guidelines
Abstract:
The Auckland Regional Council is currently updating Technical Publication 108 ‘Guideline for rainfall-runoff modelling in the Auckland region’. This presentation provides a summary of the update and improvements incorporated into the guideline. The existing guideline is used in flood studies and to size stormwater and sediment treatment devices. Rainfall depth, design storm shape, estimation of rainfall losses and runoff calculation, and runoff transformation have been reviewed and updated. An additional ten years of rainfall record provided the opportunity to update the rainfall depth-duration-frequencies (DDF), allowing for increased confidence in the derived rainfall statistics. New DDF rainfall maps for 3-month to 500 years are provided within the updated guideline. The Soil Conservation Service (SCS) Curve Number approach is maintained, while two other methods to calculate rainfall losses have been added: the rational method and the initial loss, constant infiltration approach. Guidance is provided as to which method to use. The introduction of the kinematic wave method (in conjunction with initial and constant loss method) provides a more physically-based approach. It provides an alternative method that may be more suitable to certain design situations.
Presenter profile:
Bodo Hellberg has been with the ARC since 2006. After a year in the stormwater and earthwork consents and compliance division he joined the Stormwater Action Team. He has a civil engineering background and experience in flood modelling, interaction of ground and surface water, water quantity and quality management, erosion, transport and deposition of sediment. A key activity in his current role is the update of TP108.
Colin Roberts
Regional and local flood hazard mapping
Abstract:
This abstract will be posted shortly.
Presenter profile:
Colin is General Manager of DHI Water and Environment New Zealand and is responsible for software products, specialist consulting and research activities. He has 15 years experience in water engineering and has worked in New Zealand, Australia and Europe as a specialist hydrodynamic modeller on a range of projects spanning urban drainage, water resources and marine environments. Colin is actively involved in growing DHI research activities in New Zealand and has a technical interest in methods of schematising real word systems for computational modelling, promoting the development and use of water quality and hydro-ecological modelling and a strong interest in understanding the nature of turbulence.
Warren Gray
New MfE guidance on future flooding
Abstract:
The Ministry for the Environment (MfE) released a new technical report ‘Tools for estimating the effects of climate change on flood flow’ and an accompanying summary publication, ‘Preparing for Future Flooding’ at the Stormwater 2010 conference in Rotorua in May. These publications provide a picture of the impacts of climate change on river flow and flooding. The summary also provides good practice information and guidance to help local authorities incorporate climate change impacts into flood risk management planning. This flooding guidance complements the MfE’s other climate change guidance ‘Climate Change Effects and Impacts Assessment’ and its summary publications ‘Preparing for Climate Change’, ‘Preparing for Coastal Change’, and ‘Coastal Hazards and Climate Change’. The presentation will discuss the new guidance, as well as outline some of the upcoming climate change research that is relevant to stormwater around Auckland.
Presenter profile:
Warren Gray has a background in severe weather analysis and hazard management. His current role involves gathering the best science information on climate change and providing advice for the Ministry for the Environment on its implications. Previously he worked as a researcher at the National Institute of Water and Atmospheric Research.
Jane Puddephatt
Flooding and climate change – Auckland case studies and toolbox
Abstract:
This presentation provides an overview of the FRST-funded ‘Climate Change and Urban Impacts’ research project. The project’s aim is to assist local government to reduce the impacts of climate change on the urban built environment and infrastructure. The research project is led by NIWA and undertaken in partnership with MWH New Zealand, BRANZ and GNS. The case study approach used to frame the research project and the development of the ‘Climate Change Adaptation Toolbox’ for local government will be discussed. Links to other climate change research initiatives will also be provided.
Presenter profile:
Jane is a senior scientist in the Planning and Environmental Science team at MWH New Zealand. She has over nine years experience in environmental management, policy development, pollution prevention, stormwater management and sustainable business practice. Jane has worked across a range of disciplines to identify barriers and find opportunities to deliver sustainable urban water management solutions. Jane is currently involved in a range of urban-focussed projects including research and preparation of guidance material on climate change adaptation, revision of the low impact design guideline for the Auckland Regional Council and a review of the Hamilton City District Plan.
Hayden Easton
TP124 update and new guidelines
Abstract:
Technical Publication 124 ‘Low Impact Design Manual for the Auckland Region’ is currently under review. The current version is focused on Greenfield develpoment. The updated Technical Publication 124 will encompass three sections. The first section will introduce Low Impact Design and its principles, as well as provide discussion about barriers and responses for increasing implementation. The second section will address the application of LID within greenfield and brownfield environments. The final chapter will present several case studies. The presentation will discuss the process of updating TP124.
LID Innovative Grant programme – projects
Abstract:
The Low Impact Design Innovative Grants (LIDIG) programme is now commencing its third round of grants. In the second round, six developments were accepted into the programme. This presentation briefly discusses these developments. The developers objectives for each development is discussed, as well as initial LID methods that were identified for the developments.
Presenter profile:
Hayden Easton has been with the ARC since 2004, firstly as a field monitoring officer and now as Acting Team Leader of the Stormwater Action Team. He is responsible for the delivery of the Stormwater Action Plan, and the promotion and education of low impact design in the Auckland region.
Simon Matthews
Wynard’s Quarter – Jellicoe Street
Abstract:
Wynyard Quarter, or the Tank Farm, is being progressively redeveloped into a mixed use, multipurpose urban village. The early development and activation of the Jellicoe Precinct is critical to the success of the project and work is now underway on the new public realm areas. A feature of the project is the way in which low impact stormwater treatment has been integrated into the desired urban design outcomes. The Jellicoe Street and Silo Park areas incorporate a wetland and bioretention raingardens that not only achieve the treatment targets but also add to the overall public amenity.
Presenter profile:
Originally trained in Natural Resources Engineering, Simon has worked as an engineer and project manager for nearly 20 years in a variety of roles, both in New Zealand and overseas. In that time, he has been involved in a number of water, wastewater and stormwater projects, including management positions at Watercare Services and assisting Metrowater with their city-wide flood hazard mapping. More recently he has undertaken project management roles with companies such as Williams Land and Auckland International Airport. He has been directly involved with Sea+City Projects on the Wynyard Quarter redevelopment since early 2009 where he manages the plan change processes and maintains an overview of resource consents applications.
Nigel Hosken
Belmont residential development
Abstract:
The Belmont Project is a proposed 72 hectare residential development on the western side of Pukekohe in the Franklin District. It forms part of the Franklin District Council’s provision for future growth including approximately 720 new homes over the next 14 years. The Belmont site is gently contoured and bisected by the upper reaches of the Whangapouri Stream which is covered by the Pukekohe North Catchment Management Plan (CMP) that has one remaining unresolved appeal.
The initial Belmont Stormwater Management Plan proposed the retention of the key elements of the Pukekohe North CMP within the Belmont Structure Plan including online detention and water quality treatment. This stormwater management plan was subsequently amended using low impact design principles. The presentation will describe the differences between the two approaches and the affects on the proposed development.
Presenter profile:
Nigel Hosken is the principal of Hosken & Associates Limited established in 2002. He is a Registered Architect and has extensive architectural, construction and project management experience in residential through to commercial and infrastructure projects both locally and overseas.
Recent projects in New Zealand include; Takanini Structure Plan Stages 1a, 1b, 2a and 2b and Hingaia Structure Plan Stage 1A in Papakura. Current Projects include Belmont, West Pukekohe and Kingseat both in the Franklin District.
