Update on The Salmons Brook Healthy River Challenge

on Tuesday, 02 July 2013. Posted in N21 Community

 

 

 

We've been continuing to work hard on the Salmons Brook Healthy River Challenge, with the goal of bringing the stream up to a good standard of water quality and make it a thriving, clean stream to be proud of. The Sustainable Drainage Systems (SuDS) are so desperately needed to stop some of the terrible pollution blighting the Salmons Brook, although it is a long term process, but the project is progressing well.

Aquatic invertebrate surveys.

 

The first aquatic invertebrate survey sadly, found very few species of water creatures, and those that they did find were able to tolerate high levels of pollution. We didn't find any species that only live in clean water, such as mayfly nymphs or caddis fly larvae. The worst site was the upstream site at the Lonsdale Drive stream, where only 2 different species were found – hog lice and midge larvae, and many of the hog lice were actually dead. This is very nearly a lifeless stream.

 

                                                                                                                                           Hog Louse                      Midge Larvae 

 

 

A recent Ecology Report concluded that the SuDs project would enhance the sites for wildlife by improving water quality, providing new ponds and seasonally wet areas, and opening up the woodland canopy to allow more sunlight through for ground plants to flourish. The following is recommended:

 

1. Design ponds, scrapes and wetlands to maximise their value for wildlife - plan a variety of depths, and a shallow uneven edge, and complex of small ponds/wetlands is better than one large pond/wetland.

 

2. Leave the wetlands to colonise naturally where possible, or ensure that plants are of native UK provenance.

 

3. Where the stream is re-profiled scallop the edge to provide a better wildlife rich area.

 

4. Consider coppicing trees around the edge of the new wetland areas (for the Spinney).

 

Because The Spinney is designated as a flood storage area, the Environment Agency (EA) must ensure that there will be no risk of flooding and the flood storage area will function properly. Then the designs will be signed off by the EA and the Council.

 

 

 

 

 

At Lonsdale Drive we have listened to concerns and the paths, benches and play features at Lonsdale Drive/Boxers Lake have been removed as a result. Informal routes will be created around the wetlands to allow for maintenance access, so anyone who wants to will be able to use these paths to get close to the new wetlands, but the natural feel of the woodland will remain.

 

 

 

 

 

 

Please do get in touch and let us know what you think of the updated designs. You can email, call or write to me on the details below. There will also be a chance to chat with us on the following evenings:

 

Monday 8th July – 5.30-7pm: Find us in the wooded area by the stream on Lonsdale Drive North

Wednesday 10th July – 6-7pm: Find us next to the Houndsden Stream in the Spinney on Houndsden Rd

 

You can find more information about the project on our website      http://www.thames21.org.uk/salmons-brook/

 

Aimee Felus

Salmons Brook Healthy River Challenge Project Manager

Thames21 - bringing London's waterways to life

 

The Lock Office

Gillender Street

Bromley by Bow

E3 3JY

M: 07554 402727

T: 0207 0936 382

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W: www.thames21.org.uk

Facebook: http://www.facebook.com/lovethelea

Registered charity no. 1103997

 

 

We've been continuing to work hard on the Salmons Brook Healthy River Challenge, with the goal of bringing the stream up to a good standard of water quality and make it a thriving, clean stream to be proud of. The Sustainable Drainage Systems (SuDS) are so desperately needed to stop some of the terrible pollution blighting the Salmons Brook, although it is a long term process, but the project is progressing.

Comments (1)

  • Peter Johns

    Peter Johns

    25 July 2013 at 16:15 |
    It is not only misconnected drains that are causing pollution to Salmons Brook. Another factor is that much of the foul drainage system is undersized. Built many years ago it now has to cope with increased urban development - for example the flats devopment of Cedars House at the junction of Highfield Road & Green Lanes connected into a foul sewer that was already overloaded, especially following heavy rain.

    Another factor is the paving over of front gardens. See

    http://www.thames21.org.uk/2013/06/the-road-to-river-destruction-is-paved/

    But try to tell houseowners in Grange Park that they cannot create off street parking at their properties because it is causing pollution in Lower Edmonton and expect a reaction!

    And they will probably point out - correctly - that the pollution they are causing is minor compared to that coming from the likes of the Montague & Eley Industrial Estates.

    http://www.thames21.org.uk/2013/07/lovetheleajuly/

    But two wrongs do not make a right and I think that Thames 21 is doing good work to highlight the issue and these SuDS sunken pools look to be a great way to clean up our water courses as even the water reaching Enfield Golf Club from Boxers Lake upstream is heavily polluted.

    http://www.thames21.org.uk/salmons-brook/

    reply

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