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>

<< Aug 2019 >>
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 31 1

Eastern Chapter WEDA Fall 2019 Conference

Wednesday (10/16/19) afternoon will start the program with an opportunity to take the Dredging 101 course.

read more >

10TH Annual Conference Dredging in India

The conference will focus on strategies and solutions to meet the future dredging requirements…

read more >

Australasian Coasts and Ports 2019

Conference Theme “Future directions from 40°S and beyond” reflects the increasing awareness about the need to find suitable…

read more >

PORTS Conference

The PORTS Conference series is internationally recognized as an outstanding opportunity to network with…

read more >

Jobs>

Looking to fill a job opening?

By advertising your job here, on the homepage of DredgingToday.com, you'll reach countless professionals in the sector. For more information, click below....

apply

Looking to fill a job opening?

By advertising your job here, on the homepage of DredgingToday.com, you'll reach countless professionals in the sector. For more information, click below...

apply

Dredging jobs in Abu Dhabi at NMDC

National Marine Dredging Company “NMDC” aims to be the largest dredging player in the Arab’s Gulf region...

apply