The application of natural hazard mapping by territorial Regulatory Authorities

Natural hazard mapping is a commonly used method for defining land areas prone to processes such as slope instability and subsidence. Recent changes in New Zealand legislation require Regulatory Authorities can meet their responsibilities.

This study developed a natural hazard classification system for Waitakere City, an area located to the west of Auckland City on the North Island of New Zealand. Waikatere City is characterised by a diverse topography and geology and has a history of natural hazard issues. Integral to the developent of a natural hazard classification system for the Council was an assessment of how the system could be included as part of the proposed Waikatere City District Plan and assist in the control of natural hazards. A range of proposals were developed as part of the study for the inclusion of the hazard classification system in the Plan.