Reinstatement of Little Go channel

The Littlego Stream includes an urban portion that runs close to Braemar Place & Braemar Ecovillage in Nelson South, Nelson. A significant section of the stream is culverted underground, while we have undertaken planting on the open-channel length of the stream.
 

The stream supports a healthy ecosystem including kokopu and koura. A small section of the stream’s bank has been planted, we wish to carry out further riparian planting.

Moreover, we would like to day-light the stream (i.e. bring it out of its currently culverted form) and also restore it into its original channel. Doing so would allow the surrounding paddock to provide flood protection and sediment retention benefits, and also reduce scouring that poses risks to local properties. There is also the possibility of connecting the stream with a nearby wetland.
We are seeking a design/restoration concept that can be presented to Nelson City Council to support the above remedial works. Expert advice in stream design / stream engineering is required.