In this paper the approach to this pilot study is explained in detail. The study uses a risk-based assessment for identifying ongoing management of the catchment over the next 100 years to ensure that the current flood risk is maintained or mitigated to an acceptable level.
This paper explores the use of tools such as the Mauri Model, which integrates qualitative and iwi values into the decision making process, and the Stream Ecological Valuation methodology, to identify and communicate stream enhancement opportunities, and to guide the decision making process.
This paper provides an outline of the process followed and examples of the resulting programme options to assist Council decisions making and adoption through the LTP.
This paper provides a stock take of our current understanding of costs of WSD, and explores the issues of resilience and long term cost effectiveness of green infrastructure stormwater management solutions.
Concentrations of nitrogen compounds in Haytons Stream, an urban waterway in Christchurch New Zealand, have been reported to be elevated. High levels of ammonia and/or related nitrogen compounds can be toxic to aquatic organisms and can have a significant effect on the stream’s ecological health.
In the face of expanding urbanisation, one of the opportunities for more resilient and sustainable cities is in the implementation of hybridised nature-based ecologies that function as engineering, community and landscape infrastructure.
In New South Wales (NSW) the Department of Primary Industries (DPI) sets onerous regulatory requirements on waterway extraction projects and directs designs towards having no impact on waterway base flows and no online storage or works within the waterway channels.
Living in the direct path of the storm and having spent nearly five years of my early career as a municipal storm-water engineer in Auckland, I will share my perspective and lessons learned as one of those directly affected by the flood.
This paper presents the flooding issues, options considered, the selection of the preferred solution and highlights some the challenges encountered during the design of the first two stages.
Stormwater360 NZ has partnered with Contech USA to develop a local version of this rapid filtration media. One of the reasons current bio retention guidance limit the hydraulic conductivities of media to less than 350 mm/hr is to support plant growth.
This paper is a case study of the future-proofing of the stormwater infrastructure for Richmond, the largest town township in the Tasman District. Borck Creek is one of the critical watercourses in the Richmond catchment serving a 1,400 hectare catchment area.
This paper describes the development of a stormwater-specific Mauri Model assessment tool which was trialed on a number of stormwater infrastructure projects. The output from the tool and feedback from Stormwater Department project engineers and Auckland mana whenua are also discussed.
This paper takes a holistic approach to resilience. It demonstrates that the flood protection benefits which need to be realised in the event of a large flood rely on the community having an understanding of river behaviour, having a connection to the river corridor, and understanding and valuing the role of flood protection assets.
The Dudley Creek catchment in Christchurch has a long history of flooding, a risk which has been increased in many locations by the 2010/11 earthquake series. The catchment is drained by a complex network of waterways and pump stations, and includes the significant Cranford Basin rural area which has long been proposed as a strategic flood storage area.
This paper outlines the methods applied in investigating and understanding the location of the breach, its failure mode, how its progressive development was modelled and the consequences of that modelling on the design and on the flood resilience of the community.
This paper will present the core changes in Auckland’s stormwater management philosophy, the move towards adaptable management and the elements of consultation being undertaken by Auckland Council.
This paper will explore the relationship between flood events and funding of stormwater and flood mitigation works around New Zealand, using case studies and data from a few local authorities around the country.
This paper compares New Zealand design guidelines for raingardens and the Filterra with those evaluated in the Geosyntec report and discusses the equivalency of the two BMP’s in a New Zealand context
This paper reviews monitoring and performance results of an innovative high surface area membrane-based stormwater filtration system to illustrate pollutant removal performance capability, and capacity.
Water Sensitive Design is being implemented via the Housing Accords and Special Housing Areas Act which implements the Proposed Auckland Unitary Plan (PAUP). Special Housing Areas have allowed Auckland Council to test planning provisions to encourage Water Sensitive Design (WSD) in greenfields and brownfields scenarios.
This paper presents a methodology for preparing rain radar data from the Auckland Metservice radar to allow generation of spatially continuous ARI maps, and demonstrates how the data can be used to gain understanding of the cause of flooding events for a test case.