In October 2019, we completed a research project to develop a set of social vulnerability indicators for flooding in New Zealand.
Social vulnerability indicators are used to identify areas with people who are more vulnerable to the negative impacts of floods. In these areas, people may be less able to anticipate, prepare for, cope with, and recover from a flood.
These indicators have been developed for flooding, but they may also be useful for other natural hazards.
The social vulnerability indicators cover the following topics:
- Exposure: direct exposure; indirect exposure
- Susceptibility: children; older adults; people with physical health needs; people with mental health needs; people with a disability
- Resilience: enough money to cope with crises/losses; social connectedness; knowledge, skills and awareness to face hazards; safe, secure and healthy housing; enough food and water to cope with shortage; decision-making and leadership.
Indicators include both population data, and point locations relating to vulnerable populations (such as schools, aged care facilities, and health care facilities).
Porirua case study
This project included a case study for Porirua. To explore the interactive online map of indicators, visit the Social Vulnerability Indicators Story Map for Porirua.
Indicator data for New Zealand
Indicator data is now available to download for a range of geographies, including territorial authority, area unit, and meshblock (where possible).
Social vulnerability indicators - heatmap and territorial authority summary (Oct 2019) (xlsx, 6.8MB): This dataset provides summary indicator data by area unit and territorial authority, for the whole of New Zealand. Indicator data are presented as summary 'heatmaps', to show indicators at a glance. Indicator data is mainly from the 2013 Census.
Figure 1: Example of social vulnerability indicators 'heatmap' from the Excel file
Social vulnerability indicators - full indicator dataset (Oct 2019) (xlsx, 37MB): This dataset provides the full set of indicators, by territorial authority, area unit, and meshblock (where possible). Data about population demographics, languages spoken, and population projections have also been included. The indicator data is mainly from the 2013 Census.
How to use the indicators
We have produced the following guidance documents about how to use the social vulnerability indicators. The following resources are available (see the Downloads box above):
- Toolkit for users: This toolkit provides information on how to access and use the social vulnerability indicators for flooding.
- Rationale, indicators and potential uses report: This document provides information about the potential uses of social vulnerability indicators for flooding, as a reference document for end-users.
Incorporating social vulnerability into land use planning
As part of this project, we identified ways of including social vulnerability into land use planning and local government, including District Plans. The following report is available (see the Downloads box above):
- Incorporating vulnerability into land use planning: This report identifies ways of including social vulnerability into local government processes, including land use planning, Annual Plans and Long Term Plans. A case study of Porirua City Council is included, to give an example of how to include vulnerability into a District Plan.
We have documented our methods and process for developing the social vulnerability indicators in a research report. The following report is available (see Downloads box above):
- Research report: This report report presents the methodology and rationale used to develop the social vulnerability indicators for flooding.
The social vulnerability indicators are also available in RiskScape, which is a risk modelling software developed by NIWA and GNS Science (https://www.riskscape.org.nz). RiskScape is an open-access tool that lets users assess risk from natural hazards to buildings, infrastructure and people.
If you are interested in using the social vulnerability indicators as part of some RiskScape analysis, please contact Ben Popovich (Benjamin.Popovich@niwa.co.nz) or Kristie-Lee Thomas (firstname.lastname@example.org).
We are grateful to the Natural Hazards Research Platform for funding this two-year project.
This project was led by the Environmental Health Indicators team from Massey University. The project team also included Rawiri Faulkner (Tūtaiao Ltd), Ben Popovich (NIWA), Kristie-Lee Thomas (GNS Science), James Beban and Sarah Gunnell (Urban Edge Planning Ltd).
We would like to thank our stakeholders for their time and help with this project, including Porirua City Council, Wellington Region Emergency Management Office (WREMO), Regional Public Health, Capital and Coast DHB, Tū Ora Compass Health PHO, Ministry of Civil Defence and Emergency Management, GNS Science, NIWA, and Ngāti Toa Rangatira.
For more information
If you would like more information about this project, contact Kylie Mason (email@example.com) or the EHI team (firstname.lastname@example.org).