Stormwater Solutions

 

The merger of Stormwater Solutions Consulting Limited with CKL in May 2015 enabled us to provide clients with fully integrated solutions for complex and multidisciplinary engineering projects. Our stormwater experts provide environmental and ecological solutions for residential and commercial developments, which improve the quality of New Zealand’s streams, lakes, and coastline.

  • Flood risk assessments
  • Stormwater treatment, disposal and management
  • Design and construction of stormwater management systems
  • Innovative, effective and sustainable stormwater solutions
  • Minimal environmental impact

 
For more information contact:

Bronwyn Rhynd
bronwyn.rhynd@ckl.co.nz
P 09 524 7029
M 027 454 5533

Zeb Worth
zeb.worth@ckl.co.nz
P 09 524 7029
M 022 6374 916

Hamish Ross
hamish.ross@ckl.co.nz
P 07 871 6144
M 021 215 6346 
 

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Case Studies


Fletcher Living

CKL is working with Fletcher Living on a long-term, large-scale residential development to create new communities in Auckland’s northwest. The development will be delivered in 8 stages across 15 years, converting farmland to liveable urban spaces. Currently the first two stages are built with landowners sharing the new urban environment in standalone and terrace housing.

A project of this size and scale has to be flexible and adaptable to accommodate changes to urban planning requirements and the needs of the community. CKL is taking this project from concept to development.

Comprehensive site assessments have been carried out and the proposed plan for the development is firmly anchored by a water sensitive urban design philosophy. As an important catchment area, we have taken a much softer, greener approach to the engineering plan for the roading system and stormwater management. Bio detention devices, stormwater ponds and filtration trenches have all been factored into the catchment management plan and will strongly influence the subdivision design.

Judges Bay Beach

CKL’s stormwater team (previously Stormwater Solutions) was part of a consortium led by Reset Urban Design that undertook the Auckland Council’s Judges Bay Beach Stage 2 Replenishment project. This project has received environmental awards both in New Zealand and on the world stage.

The project team had a strong focus on providing sound stormwater management to improve the water quality in Judges Bay.

Stormwater treatment devices were installed to ensure the highest treatment standard was achieved for not only the on-site surface runoff associated with the project area, but also the existing discharge from the upper Judges Bay Road pavement.

By incorporating raingardens, swales and proprietary devices in a sequence to treat the discharged water, the quality of water at the all-tide swimming beach has been significantly improved.

Addison Development

The 80ha Addison Development in Takanini has been undertaken in stages with the initial stage completed in 2003.

CKL’s stormwater team (previously Stormwater Solutions) has been involved since the project inception, providing best practice design for stormwater management in a residential development.

Expert stormwater consultants incorporated a water sensitive design (WSD) approach to stormwater management in the 14ha The Avenues stage. This WSD, or low impact solution, includes raingardens and swales for at-source treatment and management of stormwater runoff prior to discharge to the receiving environment.

Due to the site’s flat terrain and the challenges this posed for constructing efficient and cost effective solutions, detailed hydrological and hydraulic modeling was also undertaken.

Our team is currently working on the stormwater management design for the final stages of this residential development. Elements that have been included in the overall stormwater strategy include ponds, which provide visual amenity for the local community and a sense of place and purpose for Iwi. We are also working in collaboration with other consultants to create a fully integrated urban environment.

Auckland Botanic Gardens

CKL’s stormwater team (previously Stormwater Solutions) conducted the preliminary and detailed stormwater management design for the upgrade of the Auckland Botanic Gardens car park and access ways.

Close liaison with Council and operational staff at the Botanic Gardens was the key to the integration of existing and proposed stormwater treatment and management systems.

The main objectives of the upgrade project were to ensure interaction of the treatment facility with the receiving environment and to provide an opportunity for social learning.

The stormwater management upgrade included the treatment of runoff through a raingarden, prior to discharge to a stream. This raingarden treatment has been successful and is now showcased by both Council and environmental consultants as to ‘how a raingarden should be designed’.

Mokoia View Apartments

CKL’s stormwater team (previously Stormwater Solutions) prepared a stormwater management plan to support a resource consent application for Mokoia View Apartments - a multi-storey apartment development in Birkenhead.

The Auckland Unitary Plan (operative in part) rules were applied for this project; facilitating a water sensitive design (WSD) approach to the management of stormwater and overland flow paths.

The design incorporated raingardens and tree pits, and complemented these with the harvesting of runoff to meet Council requirements and ensure a sustainable outcome for the project. A collaborative approach to project design guaranteed the landscape encompassed the needs of at-source stormwater runoff management.

The team consulted neighbouring property owners and tenants; providing quality, clear and concise information to enable all parties to make robust decisions regarding project approval.

Boundary Road Ecological Assessment

CKL’s stormwater team (previously Stormwater Solutions) was engaged by consultants on behalf of the Boundary Road landowner to provide an ecological assessment of a stream that traverses the site.

In order to fully utilise the development potential of the site, the intention was to divert the stream to a slightly altered alignment, whilst still providing ecological and amenity values, and stormwater conveyance to the downstream receiving environment.

The assessment, conducted prior to the construction of the residential development, provided a baseline Stream Ecological Valuation (SEV). The SEV survey score allowed Ecological Compensation Ratio (ECR) calculations to be performed, which informed the on-site mitigation works and planting.

A planting plan was developed for the stream riparian margins as well as for a proposed wetland, which was created adjacent to the stream for stormwater treatment purposes.