About the project
An ecosystem services report commissioned by Living Water identified widespread use of detention bunds as a potential solution for slowing water flows, removing sediment and improving overall catchment resilience. Engineers were engaged to design and build detention (earth) bunds in flow paths to collect and slow the release of stormwater on two farms. The ability of these structures to reduce peak flow and capture sediment in the Northland farming landscape is currently being assessed.
Following assessment results, we will evaluate the cost effectiveness and water quality outcomes of using detention bunds throughout the entire catchment. In turn, this will determine whether they can effectively manage peak run off in Northland.
- Reduced sediment to waterways
- Construction completed April 2018
- Monitoring ongoing until end of 2019
Detention Bund Trial video
Concept and detailed design
Completed early 2017
Project Implementation and Construction
Completed April 2018
Started early 2018 - will finish end 2019
- Complete monitoring to determine how effective detention bunds are at slowing water flow and trapping sediment
- Test scalability of implementing detention bunds catchment-wide and beyond
- Establish the best ways of supporting partners to build detention bunds as a widespread freshwater improvement tool