Local government and climate change
Councils may find it helpful to use the following table in order to assess the relevance of climate change effects to a particular local government function or operation. Further guidance for local government is provided by the Ministry for the Environment.
Function |
Affected assets or activities |
Key climate influence |
Possible effects |
Sensitivity to Effects |
Water supply and irrigation |
Infrastructure |
Reduced rainfall, extreme rainfall events; increased temperature |
Reduced security of supply (depending on water source); contamination of water supply. |
Rivers, groundwater, water quality, water availability, coastal areas |
Wastewater |
Infrastructure |
Increased rainfall |
More intense rainfall (extreme events) will cause more inflow and infiltration into wastewater network; wet weather overflow events will increase in frequency and volume; longer dry spells will increase likelihood of blockages and related dry weather overflows. |
Drainage |
Stormwater |
Reticulation, stopbanks |
Increased rainfall; rise in sea level |
Increased frequency and/or volume of system flooding; increased peak flows in streams and related erosion; groundwater level changes; saltwater intrusion in coastal zones; changing flood plains and greater likelihood of damage to properties and infrastructure. |
Rivers, drainage, coastal areas |
Roading |
Road network and associated infrastructure |
Extreme rainfall events, extreme winds |
Disruption due to flooding, landslides, fallen trees and lines; direct effects of wind exposure on heavy vehicles. |
Drainage, natural hazards |
Planning/policy development |
Management of private sector development; urban expansion; infrastructure and communications planning |
All |
Inappropriate location of urban expansion areas; inadequate or inappropriate infrastructure, costly retrofitting of systems. |
Rivers, groundwater, drainage, coastal areas, natural hazards |
Landcare |
Rural land management |
Changes in rainfall, wind and temperature |
Enhanced erosion; changes in type/distribution of pest species; increased fire risk; reduction in water availability for irrigation; changes in appropriate land use; changes in evapo-transpiration. |
Water availability, erosion, biodiversity, biosecurity, natural hazards |
Watercare |
Management of watercourses/ lakes/wetlands |
Rainfall and temperature changes |
More variation in water volumes possible; reduced water quality; sedimentation and weed growth; changes in type/distribution of pest species. |
Rivers, lakes, wetlands, water quality, drainage, erosion, biosecurity |
Coastal management |
Infrastructure; management of coastal development |
Temperature changes leading to sea level changes; extreme storm events |
Coastal erosion and flooding; disruption in roading, communications; loss of private property and community assets; effects on water quality. |
Coastal areas, natural hazards |
Civil defence and emergency management |
Emergency planning and response; recovery operations |
Extreme events |
Greater risks to public safety and to resources needed to manage flood, rural fire, landslip and storm events. |
Natural hazards |
Biosecurity |
Pest management |
Temperature/ rainfall changes |
Changes in range of pest species. |
Biosecurity, biodiversity |
Open space and community facilities management |
Planning and management of parks, playing fields and urban open spaces |
Temperature/ rainfall changes; extreme wind and rainfall events |
Changes/reduction in water availability; changes in biodiversity; changes in type/distribution of pest species; groundwater changes; saltwater intrusion in coastal zones; need for more shelter in urban spaces. |
Groundwater, drainage, water availability, biodiversity, coastal areas |
Transport |
Management of public transport; provision of footpaths, cycleways etc |
Changes in temperature, wind and rainfall |
Changed maintenance needs for public transport (road, rail) infrastructure; disruption due to extreme events. |
Drainage, natural hazards |
Waste management |
Transfer stations and landfills |
Changes in rainfall and temperature |
Increased surface flooding risk; biosecurity changes; changes in ground water level and leaching. |
Biosecurity, natural hazards |