Natural Hazard Risk Assessment - Ōtorohanga District

Report: TR 2009/34

Author: G Ryan

About this report

This report provides an overview of natural hazards in the Ōtorohanga district as a basis for guiding and prioritising work activities by Ōtorohanga District Council (ODC) and Environment Waikato (EW) for 2009/10 and beyond.

It also provides a useful insight into the district’s natural hazards as part of the scheduled review of the Ōtorohanga District Plan.
Both agencies have responsibilities for the management of natural hazards in accordance to a complex set of statutory responsibilities, but primarily via the Resource Management Act 1991.

Known natural hazards in the Ōtorohanga district are identified and explained. Hazard scenarios are defined for each natural hazard and existing risk management controls are outlined. A preliminary (qualitative) risk analysis is then undertaken, and an evaluation of the risk from each natural hazard is made as a basis for prioritising risks.

River flooding hazards pose the greatest risk in terms of potential loss of human life, social disruption, economic cost and infrastructure damage. Coastal flooding has the second highest risk, and land instability has the third highest risk.

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Natural Hazard Risk Assessment - Ōtorohanga District [PDF, 2.2 MB]