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Tonkin + Taylor’s Water Resources team is committed to creating sustainable solutions for our clients, communities, and the environment.

As consultants in integrated water resource management, we work across sectors and disciplines to deliver innovative, custom solutions for every phase of project development and management. Our team of over 100 specialists across New Zealand provides a comprehensive range of water engineering and water resources skills to support your needs.

From strategy and master planning to detailed design, construction, and asset management, we prioritise sustainability and innovation in all our work.

We understand the importance of safeguarding our environment and aim to create solutions that support economic and social wellbeing without compromising the sustainability of vital ecosystems. T+T has a long history of award-winning Water Resource experience. Allowing us to offer unparalleled expertise to our clients to ensure that our solutions meet their needs while also being mindful of environmental impact.


  • Stormwater
  • Wastewater
  • Water Supply
  • Strategy and planning through to design and delivery and asset management
  • Coastal processes and hazard modelling and assessment
  • Coastal and marine structures & facilities design, construction and asset management
  • Dredging and reclamation
  • Geomorphology
  • River modelling and flood hazard assessment
  • Catchment planning
  • River engineering planning, feasibility, design, construction asset management
  • Fish passage evaluation, design and construction
  • River, stream and wetland rehabilitation
Hydrology Data

  • Interpretation and analysis of raw data
  • Hydrometric gauging network data, collection and analysis

Hydrology Analyses

  • Rainfall and flood frequency analysis
  • Extreme rainfall and flow estimation
  • Catchment delineation
  • Catchment rainfall-runoff modelling
  • Probable maximum rainfall and flood assessment
  • Drought assessment
  • Natural hazard assessment

Planning and operation of water resource systems

  • Hydrological alteration assessments
  • Water use availability assessments
  • Interpretation/analysis of climate change or land use impact on water resources
  • Water supply planning and modelling
  • Optimisation of water resource projects

Soil and Quality Interface

  • Sediment transport and erosion control
  • Groundwater/surface water interaction
  • Water quality
  • Lake quality
  • Soil and Quality Interface

Model inputs and Modelling

  • Dam Break modelling and hazard mapping
  • Bridge waterway and scour design
  • Design of in-river hydraulic structures, dams and reservoirs
  • Drainage and stormwater management systems
Climate risk and adaptation

  • Regional, local and organisational climate change risk assessments (CCRA)
  • Frameworks for risk assessment processes and application
  • Workshop facilitation and engagement
  • Damage and loss assessments
  • Adaptation and resilience planning
  • Innovative tools and approaches to communicating climate change impacts
  • Natural hazard modelling including coastal, flood and streamflow
  • Monitoring, evaluation, and reporting frameworks for adaptation
  • Dynamic Adaptive Policy Pathways (DAPP) implementation

Climate change mitigation

  • Corporate GHG emissions inventories of operations and assets to meet ISO 14064-1:2018 and GHG Protocol Corporate Standard requirements
  • Community, Project and Product carbon footprints to meet GHG protocols, standards and PAS 2050 (Publicly Available Specification)
  • Development of GHG emission policies and reduction targets
  • Development of organisational and regional mitigation plans to reduce/offset carbon emissions (roadmaps)
  • Progress monitoring and evaluation
  • Development of software solutions including emissions measurements and reporting (“dashboards”) and carbon calculation tools
  • Setting emission reduction targets using Science Based Targets Initiative (SBTi)

Wider sustainability services

  • Waste and water consumption minimisation and recycling
  •  Advice on selection and sourcing of alternative materials and products to minimise the environmental footprint of projects
  • Obtaining sustainability ratings such as ISC
  • Rapid Mapping for Disaster Response
  • Climate Change and Disaster Risk and Hazard assessments
  • Multi-Hazard Early Warning Systems development
  • Web, desktop and mobile bespoke software development for the Humanitarian Sector
  • Water storage, hydropower and irrigation
  • Dambreak analysis and hazard mapping
  • Computational hydraulic modelling
  • River engineering and hydraulic structures
  • Eco-hydraulics (habitat-friendly design)

Recent Projects

Drury South Crossing Precinct

Drury South Crossing Precinct

Clifton to Tāngōio Coastal Hazard Strategy 2120

Clifton to Tāngōio Coastal Hazard Strategy 2120

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With a growing presence across New Zealand, Australia and the Asia-Pacific region, Tonkin + Taylor offers a range of water infrastructure and treatment services.

Looking for innovative and sustainable solutions for your next project?

Get in touch – together we create and sustain a better world.

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