Sediment Removed from Wairarapa Stream in Christchurch

North Canterbury Fish & Game staff recently spent two weeks co-ordinating the removal of sediment from the Wairarapa Stream in western Christchurch, according to the Fish & Game New Zealand latest announcement.

During this cleanup scheme, sixty-five tonnes of accumulated silt was blasted out of the Christchurch stream, one of the Avon River’s most important tributaries.

The operation removed silt which had accumulated over the years from storm-water drains flowing into the once-pristine stream.

The goal was to make the stream suitable for trout to spawn in, and habitable by other aquatic life.

“Silt layers on top of the stream gravels had smothered the invertebrates that live in the stream bed, and by removing the sediment aquatic life has the chance to prosper again,” said Fish & Game Officer Emily Arthur-Moore.

In total, around 540 square meters of streambed near the Jellie Park Recreation and Sport Center in Ilam were cleaned. That equates to 120 kilograms of silt per square meter cleaned.

The project had planned to be carried out over a longer reach but the techniques took longer than expected.

“Various techniques were used during the two weeks, including water jet blasters, diggers and a specialized piece of equipment called a ‘sand wand’,” Ms Arthur-Moore added.

Support was given to the project by the Christchurch City Council, Environment Canterbury and Nelson-based dredging and water treatment consultants Southwater, who also provided various pumps, hoses, etc.

Share this article

Follow Dredging Today

Events>

<< Jun 2017 >>
MTWTFSS
29 30 31 1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30 1 2

2017 WORLD CANALS CONFERENCE

The conference will also reveal how the Erie Canal, North America’s most important manmade waterway, helped Syracuse transform from…

read more >

SEMINAR ON DREDGING AND RECLAMATION (THE NETHERLANDS)

This five-day course strives to provide an understanding through lectures by experts in the field and workshops, partly conducted on-site…

read more >

2nd International Conference on Coastal Zones

Coastal Zones 2017 is a global platform to discuss and learn about Coastal, Marine and Maritime Engineering, Coastal Zone Management,…

read more >

Port Development West Africa

Join Ministry of Transport, Ghana; Meridian Port Services, Ghana; Ghana Shippers Authority; Nigerian Ports Authority…

read more >

Jobs>

Dredging Consultant

Anthony D Bates Partnership LLP, a leading international dredging consultancy, is looking for a well-educated, professional and confident person to fill an immediate position...

apply

Network Support Engineer

As Network Support Engineer you will be responsible for the installation / configuration, operation and maintenance of the infrastructural....

apply

Dredge Masters, Engineers and Superintendent\'s Urgently Required!

Flagship Management is working with a number of leading international marine and dredging organizations and require the following candidates for a range of global projects...

apply