Coastal hazards and risk assessment

Tonkin + Taylor is New Zealand’s leading Environmental and Engineering Consultancy with over 40 years' experience specialising in environmental, civil, structural, geotechnical and water resource engineering. These skills have been combined to develop a strong expertise in all facets of coastal and marine engineering, planning and science.

We offer a comprehensive range of services related to coastal hazards ranging from assessment and identification of hazards to developing mitigation and resilience strategies. 

Areas of expertise

  • Coastal erosion hazard
  • Cliff stability assessments
  • Coastal inundation
  • Joint coastal and catchment flooding
  • Climate change effects
  • Numerical modelling
  • Tsunami inundation
  • Risk assessments

Recent Projects

Hawkes Bay Coastal Risk Assessment 2015
Assessment for Hawkes Bay 

Tauranga Tsunami Evacuation Planning 2013-2015
Tsunami inundation modelling and optimization of pedestrian evacuation routes 

Northland Region Erosion and Inundation Assessments 2014-2015
Probabilistic coastal and inundation assessments
for select sites in the Northland Region

Gisborne Area Susceptible to Erosion Hazard 2015
Development of an area susceptible to erosion
hazard along Gisborne’s beach and cliffed coastline

Christchurch City Sea Level Rise Assessment 2014
Assessment of the effects of sea level rise on Christchurch Urban Areas 

Samoa Post-Cyclone Recovery Assessments 2014-2015
Assessment of cyclone damage in tourism areas and
development and implementation of recovery options

Example component and CEHZ histograms (left) with the resultant Coastal Erosion Hazard Zones width (right). 


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