Smaller Flood Scheme reviewsNgā Arotake Tāwharau Iti

Different types of schemes

There are three types of schemes: flood schemes; drainage schemes; and river and stream maintenance schemes.

• Flood schemes use stopbanks, deflection banks, groynes (low walls or barriers built out into the sea from a waterway), and erosion protection to manage river flows.
• Drainage schemes use stopbanks, drains, detention dams, pump stations, control gates, and floodgates to manage floodwater and support land development.
• River and stream maintenance schemes focus on maintenance, clearing blockages, and minor erosion control.

What is involved in a Scheme Review?

The reviews include:

• Assessment of the infrastructure – its condition and current effectiveness
• Hydrological and hydraulic analysis – flood risk data, water flow patterns and the impact of climate change on future rainfall events
• Operational and maintenance analysis – how effective the maintenance schedule is
• Public and stakeholder involvement – gathering feedback from you
• Recommendations for improvements – infrastructure upgrades, new technologies, or policy changes

What do schemes cost and how are they paid for?

Each scheme has a different cost structure and budget. There are some costs that are common like insurance or pump station running costs, but each scheme has its own operating budget which is set, consulted on and approved in the Council’s Long Term Plan.

Schemes are paid for through a combination of targeted and general rates. The amount depends on many factors including who benefits from the scheme, and if any ‘reserved funding’ which is collected targeted rates that have not been used yet. During the community engagement phase, the potential costs and the rates split will be shared with you.