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

Coastal hazards and risk assessment

• 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

• Wellington City Sea Level Rise 2012-2013 Evaluation of the extent and consequences (environmental, social and economic) of coastal inundation taking into account a range of projected sea level rise changes

• 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).