Tag Archives: River restoration

Award Winning Wandle Restoration

Our rehabilitation work on the Carshalton Arm of the River Wandle recently won the Urban Category of the 2016 UK River Prize – an incredible achievement for all of those involved.

To express our thanks to everyone who has helped us along the way over the last 10 years, we have created a short film. So make yourself a cup of tea and enjoy…

The Wandle’s a Winner!

After

We’re delighted to announce that we are a category winner in the 2016 UK River Prize. The Carshalton arm of the Wandle has won the ‘Urban Project’ category and is one of four category winners who will now go forward as finalists for the overall river prize.

The overall UK River Prize will be announced at an awards dinner at the River Restoration Centre’s Annual Conference in Blackpool on the 26th April.

You can read the River Restoration Centre’s press release here (UK_River_Prize_Finalists) to see the other category winners and finalists who we’re up against. Each finalist will make a short video about their project which will be shown at the awards dinner.

Keep your fingers crossed!!

Fish Passage Restored!

Last year we were working on a fish passage project on the Wandle at Trewint Street, Earlsfield.

Although there are many weirs on the Wandle which impede the migration of fish Trewint Street is one of the largest, with two weirs either side of a large concrete channel. With funding from the Environment Agency, Thames Water and Defra’s Catchment Partnership Action Fund (CPAF), we have restored passage for fish and eels, allowing movement to upstream habitats.

So how did we achieve this?

A bespoke fish pass was designed by Fishtek and installed on the weir by local contractors Amenity Water Management (AWM).

At the top of the right hand weir, a series of recycled plastic baffles were fixed onto the weir. These deepen and slow the flow of water and as you can see from the picture below, the baffles are arranged with a diagonal gap up to the top. This is the path the fish use to swim up the weir.

Baffles

The baffles had to be fixed to the weir in dry conditions, and so sandbags were used to divert the water down the left hand weir, leaving the right hand side high and dry while our contractors worked. Watch the timelapse footage of AWM installing the baffles.

 

The second part of the fish pass were three large wooden pre-barrages at the bottom end of the island which were designed to slow the water down and reduce the drop in water level between the channel and the baffles.

Barrages going in

Each barrage was notched to create a path for migrating fish.

To makes sure the pass works in low flows a huge piece of wood (7m long!) was placed at the top of the left hand weir to divert water at low flow down the right hand side and the fish pass.  This ensures the pass works over a large range of flows.

Deflector and Eel Bristles

Bristles were fixed to each of the barrages to allow eel passage. Eel tiles were then fixed alongside the baffles on the concrete wall making the weir passable to both fish and European Eels.

A big thanks to our contractors AWM, landowner Mr Lammas and Thames Water, Defra and the Environment Agency for their funding.

Contractors

Dam, where’s all the water gone?

We’ve started work on the Trewint Street Fish Passage!

Fish passage on the River Wandle is impeded by over 30 in stream structures, the majority of which are weirs left from the milling era. These weirs and structures are a barrier to the movement of fish both up and downstream and also fragments and isolates habitats.

The Weir

Trewint Street is one of the significant barriers to fish passage, with two weirs either side of a large concrete island. With funding from the Environment Agency, Thames Water and Defra’s Catchment Partnership Action Fund (CPAF), we have started our project to install baffles and a fish pass to the right hand side weir, allowing the movement of fish once more!

The pass will also benefit European Eel populations which have declined by over 98% in the last 15 years, with barriers to movement being a contributory factor.

So what are we doing?

Low cost bafflesOn the right side channel, a series of baffles will be installed to the upper section of the concrete weir. These baffles are made from recycled plastic and fixed to the weirs in rows.  They slow the flow down on the weir, deepening the water and allow fish to swim up the weir through notches cut into the baffles (Image, Fishtek).

Barrages

In the lower part of the right hand channel, three notched barrages will be created to reduce the drop in water level between the channel and baffles. This will allow fish to easily swim up through the notches and through the baffles to new habitats beyond (Image, EA).

What will you see?

You will see a lot of building work on site over the next month as our contractors (Amenity Water Management (AWM) get started. You’ll also notice that the right hand channel is a lot drier than normal…

Dam!

Amenity Water Management have created a sandbag dam to keep the channel dry allowing them to work on installing the structures. All will return to normal once work is complete.

We’ll keep you posted with updates as always, but for now Tim is just happy to have wet feet again!

Tim happy once more

New job at SERT delivering river restoration!

A new opportunity has opened up to work with us in physical river restoration and delivery of catchment wide enhancements.

The scope of the position has now been expanded to allow applications at both Project Officer or Senior Project Officer level.

HackbridgeBefore  HackbridgeAfter

The job description can be found here: JobDescription_ProjectsOfficerSeniorProjectsOfficer_RR

And the application form here:Application_ProjectsOfficerOrSeniorProjectsOfficerRiverRestoration

To apply, please send your completed application form, together with a copy of your CV (2 pages max.) to jobs@southeastriverstrust.org before 9am on Tuesday 30th June 2015. Interviews will be held on Friday 3rd July. Second interviews, if held, will be on Wednesday 8th July 2015.

Could you be our new Catchment Manager?

This position is now closed. 

We’re looking for an enthusiastic, natural leader with a good level of knowledge of river and catchment enhancement techniques.  The role will support new and existing partnerships across the South East Rivers Trust area, bringing people and organisations together to identify and discuss catchment issues and develop projects to tackle them.

Further details can be found here: CatchmentManager_JobDescription; and an application form here: CatchmentManagerApplication.  If you would like to apply, please submit your CV (2 pages maximum) together with a completed application form by 12 noon on Thursday 4th June 2015.

sert_logo_high_resFINAL

Beddington Park: Add Your Voice!

This year there is a Heritage Lottery Fund project to restore Beddington Park, including the lakes and the River Wandle. The Wandle Trust have been involved in developing the bid with Sutton Council, providing expertise and guidance.

If you’re a user of Beddington Park or live close by, please take the time to complete this short survey to add your voice to how you use the Park and how you’d like to see it improved!

Click here to take the survey

Monitoring Madness

Olly and I have taken a successful sample set from one of our Downstream Defender silt traps in Carshalton and the results look promising…

In 2013 we installed a suite of 3 Downstream Defenders as a pollution prevention method, cleaning surface water before it enters the river. This week has seen a few periods of extreme rain downfall and Olly braved the weather to look at the effect on the river.

As we know, rainwater is collected off our roads and channeled into the river by our surface water drains. Unfortunately with the rainwater goes all the other contaminants from the roads. This causes a first flush of pollution down the Wandle.

FirstFlush black wandle

Our Downstream Defenders are designed to reduce the severity of this first flush by removing some of the worst of the pollutants before they enter the Wandle.

Today we took samples of the water upstream of one of our Defenders (before) and downstream (after) to see what difference it is making to the water quality. The samples have been sent off to the lab and will not be back for a couple of months, but for now look at the difference in colour alone!

DOWNSTREAM DEFENDER

 

Rivers & Wetlands Community Day: Friday 27 March

I have had a very exciting last two weeks at the Wandle Trust having spent more time outside in the river than in the office – lucky me!

On Friday we had our second Rivers & Wetlands Community Day with 15 volunteers joining us out in the sunshine. Tim had stored up a very long to do list since our previous Rivers & Wetlands Community Day in October last year where we added 2000 plants to the restored section of the Wandle at Butter Hill in Carshalton.

Untitled

Firstly we had to add 500 native marginal plants to the newly restored section on Mill Lane. As always, we ordered a variety of different species so we could create a natural marginal community on the banks of the Wandle. Species included ragged robin, water mint, sedges and purple loosestrife.

Planting

Meanwhile, some of our volunteers tackled the invasive non-native Canadian goldenrod (Solidago canadensis)which had established on the banks of the Wandle. Canadian goldenrod produces dense stands which out-compete native species, reducing habitat diversity. We caught it early in the season when it was just coming through as small purple tinted shrubs. You can see how dense the root system is in the image below.

Canadian goldenrod

There had been a fair bit of fly-tipping since October that we were keen to tackle, so a team of us ran a mini cleanup while the planting was going on. Some highlights included a bed frame, a motorbike at Hackbridge and a car seat. In total, 40 bags were collected which is almost the number we get on a regular cleanup!

Litter picking dream team

Next on the agenda was raking and seed sowing; coppicing and pinning in some Large Woody Material which had fallen into the river.

Woody Debris

Altogether it was a busy day and we couldn’t have got it all done without our volunteers.

So thank you all for coming: Aaron, Andy, Charles, Dave J, Dave W, Derek, Geoff, James, John, Lorna, Mike, Steve, Sue and Wally.

Rivers & Wetlands Community Days

Ravensbury Back Channel: The final touches

Two weeks ago, we spent three days back at our Ravensbury Park Back Channel project to finish off the works.

Day 1

Day 1 was spent preparing a site for 2000 plants which were due to arrive the following day.  Our loyal volunteers arrived expecting an easy day of planting and instead we surprised them with spades, shovels and a huge pile of soil! We needed to create a gentler slope on the bank and to do that involved some serious work. But with visions of tea and cake we soon got stuck in and the bank started to take shape.

Luke working hard

Meanwhile, we also had a team putting up bird boxes in the area. These bird boxes have been designed with grey wagtails in mind, a bird which you can often see skipping along the back channel.

The Bird Boxes

The day ended with a pilot test of our bat boxes. We have brought five bat boxes to put up in the area. They are odd looking things with flat wood and small crevices between for the bats to roost in – almost like a bat multistory car park! With wire and a ladder, Luke and the volunteers tried to install the first one to perfect the technique ready for the next day.

A Bat Multi-Storey Car Park

Day 2

Day 2 soon came round with slightly improved weather and all 2000 plants had arrived! We ordered a variety of species – some were to be planted in the water, and others would be added to the banks such as lesser pond sedge and reed canary grass. All together these would make a great marginal community of native plants.

2000 Plants

We had 2 sites to plant up so we divided the trays into piles of different species – one pile for each site. Our 9 volunteers then headed off to site number 1 armed with dibbers, waders and gloves.

First site all planted up

By lunchtime, the site was finished and everyone was ready for tea, coffee and cake.

A planted plant

After lunch we moved onto site 2 and decided to focus on the plants that needed water so they were in before we had to leave for the day. So it was wader time again…

Day 3

On our third and final day we were joined by 5 volunteers to do the last bits of the project. First we all focused on the final 1000 plants – and even I had the chance to get involved!

Planters at work

Louise from the Living Wandle Landscape Partnership team couldn’t resist coming for a visit and doing some planting as well.

Louise planting away

The pile slowly got smaller and after a quick lunch break we had all 2000 plants happily installed in their new homes.

Yet more planting

The next job was raking and seeding the bare ground with wildflower and grass mix. It was a great 3 days out in the field and a big thank you to all the volunteers who came to help!

The finished work

A big thanks to Lawrence who helped run the event with Luke and myself.

Thank you to all our volunteers for coming: Barbara, Charles, Dave, Jason, John, Lawrence, Maureen, Mike, Neil, Nick, Rob, Tim and Wally.

Next week – Wimbledon Common and the Beverley Brook!