Case study:River Wandle: Silt & SuDs - Revision history

Ascarr at 12:13, 19 September 2017

2017-09-19T12:13:01Z

← Older revision		Revision as of 12:13, 19 September 2017
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	{{Project overview		{{Project overview
	\|Status=Complete		\|Status=Complete
	\|Themes=Hydromorphology, Social benefits, Water quality, Urban		\|Themes=Flood risk management, Hydromorphology, Social benefits, Water quality, Urban
	\|Country=England		\|Country=England
	\|Main contact forename=Bella		\|Main contact forename=Bella

Ascarr at 12:12, 19 September 2017

2017-09-19T12:12:03Z

← Older revision		Revision as of 12:12, 19 September 2017
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	\|Lessons learn=Challenges:		\|Lessons learn=Challenges:

	- Identify spaces for DDs underground amongst utilities.		*Identify spaces for DDs underground amongst utilities.

	- Each defender had to be custom made to match the angle of the various outfall pipes allowing them to integrate with the established system.		*Each defender had to be custom made to match the angle of the various outfall pipes allowing them to integrate with the established system.

	- Getting commitment from parties to empty the DDs.		*Getting commitment from parties to empty the DDs.
	}}		}}
	{{Image_gallery}}		{{Image_gallery}}

Pollygwenbryant at 15:45, 9 February 2016

2016-02-09T15:45:44Z

← Older revision		Revision as of 15:45, 9 February 2016
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	\|Contact organisation url=www.wandletrust.org		\|Contact organisation url=www.wandletrust.org
	\|Partner organisations=Environment Agency, London Borough of Sutton, Queen Mary University of London, Thames Water, Defra,		\|Partner organisations=Environment Agency, London Borough of Sutton, Queen Mary University of London, Thames Water, Defra,
	\|Name of parent multi-site project=Case_study:~~Butter Hill restoration project,~~ River Wandle		\|Name of parent multi-site project=Case_study:River Wandle Restoration Project
	\|Multi-site=No		\|Multi-site=No
	\|Project picture=Siltex + Logo.png		\|Project picture=Siltex + Logo.png

Pollygwenbryant: Pollygwenbryant moved page Case study:Wandle River Restoration Project to Case study:River Wandle: Silt & SuDs

2016-02-09T15:42:07Z

Pollygwenbryant moved page Case study:Wandle River Restoration Project to Case study:River Wandle: Silt & SuDs

← Older revision	Revision as of 15:42, 9 February 2016
(No difference)

Pollygwenbryant at 14:46, 9 February 2016

2016-02-09T14:46:19Z

← Older revision		Revision as of 14:46, 9 February 2016
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	\|Contact organisation url=www.wandletrust.org		\|Contact organisation url=www.wandletrust.org
	\|Partner organisations=Environment Agency, London Borough of Sutton, Queen Mary University of London, Thames Water, Defra,		\|Partner organisations=Environment Agency, London Borough of Sutton, Queen Mary University of London, Thames Water, Defra,
			\|Name of parent multi-site project=Case_study:Butter Hill restoration project, River Wandle
	\|Multi-site=No		\|Multi-site=No
	\|Project picture=Siltex + Logo.png		\|Project picture=Siltex + Logo.png

Pollygwenbryant at 12:52, 9 February 2016

2016-02-09T12:52:58Z

← Older revision		Revision as of 12:52, 9 February 2016
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	1. Rain Gardens installed to intercept surface water and aesthetically enhance an area in Hackbridge.		1. Rain Gardens installed to intercept surface water and aesthetically enhance an area in Hackbridge.

	2. Downstream Defenders (DD) intercept surface water drains and remove sediment by centrifugal force.		2. Downstream Defenders (DD) intercept surface water drains and remove sediment by centrifugal force.

	3. Mycofilters are bags full of a substrate as a feedstock for the native oyster mushroom which accumulate toxins such as heavy metals from the passing water. A total of 180 mycofilters were made and grown by a team of volunteers, installed in 4 locations on the lower Wandle.		3. Mycofilters are bags full of a substrate as a feedstock for the native oyster mushroom which accumulate toxins such as heavy metals from the passing water. A total of 180 mycofilters were made and grown by a team of volunteers, installed in 4 locations on the lower Wandle.

	4. Siltex is a natural chalk-like substance which helps to increase the speed of silt breakdown by stimulating natural processes. Working with local volunteers, Siltex was added to Carshalton Ponds in November 2014 and samples taken for the proceeding months to determine the effectiveness.		4. Siltex is a natural chalk-like substance which helps to increase the speed of silt breakdown by stimulating natural processes. Working with local volunteers, Siltex was added to Carshalton Ponds in November 2014 and samples taken for the proceeding months to determine the effectiveness.

	5. Smart Sponges are a commercial product specially designed to absorb oils mixed in water. When placed in gully pots, Smart Sponges can permanently remove oils from the drainage system before they enter the rivers. A total of 23 Smart Sponges were installed in gully pots along the catchment of one surface water drain linking to a DD.		5. Smart Sponges are a commercial product specially designed to absorb oils mixed in water. When placed in gully pots, Smart Sponges can permanently remove oils from the drainage system before they enter the rivers. A total of 23 Smart Sponges were installed in gully pots along the catchment of one surface water drain linking to a DD.
	\|Monitoring surveys and results=For wider project benefits as part of the larger "River Wandle Restoration Scheme" please see the parent project.		\|Monitoring surveys and results=For wider project benefits as part of the larger "River Wandle Restoration Scheme" please see the parent project.

Pollygwenbryant at 12:51, 9 February 2016

2016-02-09T12:51:20Z

← Older revision		Revision as of 12:51, 9 February 2016
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	{{Project overview		{{Project overview
	\|Status=Complete		\|Status=Complete
	\|Themes=~~Fisheries, Flood risk management, Habitat and biodiversity,~~ Hydromorphology, Social benefits, Water quality, Urban		\|Themes=Hydromorphology, Social benefits, Water quality, Urban
	\|Country=England		\|Country=England
	\|Main contact forename=Bella		\|Main contact forename=Bella
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	\|Contact organisation=Wandle Trust		\|Contact organisation=Wandle Trust
	\|Contact organisation url=www.wandletrust.org		\|Contact organisation url=www.wandletrust.org
	\|Partner organisations=Environment Agency, London Borough of Sutton, Queen Mary University of London, Thames Water, Defra,		\|Partner organisations=Environment Agency, London Borough of Sutton, Queen Mary University of London, Thames Water, Defra,
	\|Multi-site=No		\|Multi-site=No
	\|Project picture=Siltex + Logo.png		\|Project picture=Siltex + Logo.png
	\|Picture description=Volunteers adding Siltex to Carshalton Ponds in November 2014. Please seek permission from the Wandle Trust to reuse this photograph.		\|Picture description=Volunteers adding Siltex to Carshalton Ponds in November 2014. Please seek permission from the Wandle Trust to reuse this photograph.
	\|Project summary=This Project is part of a larger scheme with the overall aim of establishing a population of brown trout in the Carshalton arm of the River Wandle for the first time in over 80 years. For more background on this larger scheme, please refer to the parent project "River Wandle Restoration Project".		\|Project summary=This Project is part of a larger scheme with the overall aim of establishing a population of brown trout in the Carshalton arm of the River Wandle for the first time in over 80 years. For more background on this larger scheme, please refer to the parent project "River Wandle Restoration Project".

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	3. Mycofilters are bags full of a substrate as a feedstock for the native oyster mushroom which accumulate toxins such as heavy metals from the passing water. A total of 180 mycofilters were made and grown by a team of volunteers, installed in 4 locations on the lower Wandle.		3. Mycofilters are bags full of a substrate as a feedstock for the native oyster mushroom which accumulate toxins such as heavy metals from the passing water. A total of 180 mycofilters were made and grown by a team of volunteers, installed in 4 locations on the lower Wandle.
	4. Siltex is a natural chalk-like substance which helps to increase the speed of silt breakdown by stimulating natural processes. Working with local volunteers, Siltex was added to Carshalton Ponds in November 2014 and samples taken for the proceeding months to determine the effectiveness.		4. Siltex is a natural chalk-like substance which helps to increase the speed of silt breakdown by stimulating natural processes. Working with local volunteers, Siltex was added to Carshalton Ponds in November 2014 and samples taken for the proceeding months to determine the effectiveness.
	5. Smart Sponges are a commercial product specially designed to absorb oils mixed in water. When placed in gully pots, Smart Sponges can permanently remove oils from the drainage system before they enter the rivers. A total of 23 Smart Sponges were installed in gully pots along the catchment of one surface water drain linking to a DD.		5. Smart Sponges are a commercial product specially designed to absorb oils mixed in water. When placed in gully pots, Smart Sponges can permanently remove oils from the drainage system before they enter the rivers. A total of 23 Smart Sponges were installed in gully pots along the catchment of one surface water drain linking to a DD.



	\|Monitoring surveys and results=For wider project benefits as part of the larger "River Wandle Restoration Scheme" please see the parent project.		\|Monitoring surveys and results=For wider project benefits as part of the larger "River Wandle Restoration Scheme" please see the parent project.

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	Smart Sponges: The concentration of hydrocarbons collected in the gully pots with and without the sponges is being monitored.		Smart Sponges: The concentration of hydrocarbons collected in the gully pots with and without the sponges is being monitored.

	Siltex: Silt and water are being monitored.		Siltex: Silt and water are being monitored.
	\|Lessons learn=Challenges:		\|Lessons learn=Challenges:

Pollygwenbryant at 12:50, 9 February 2016

2016-02-09T12:50:38Z

← Older revision		Revision as of 12:50, 9 February 2016
Line 7:		Line 7:
	{{Project overview		{{Project overview
	\|Status=Complete		\|Status=Complete
	\|Themes=Flood risk management, Hydromorphology, Social benefits, Water quality, Urban		\|Themes=Fisheries, Flood risk management, Habitat and biodiversity, Hydromorphology, Social benefits, Water quality, Urban
	\|Country=England		\|Country=England
	\|Main contact forename=Bella		\|Main contact forename=Bella
	\|Main contact surname=Davies		\|Main contact surname=Davies
	\|Contact organisation=Wandle Trust		\|Contact organisation=Wandle Trust
			\|Contact organisation url=www.wandletrust.org
			\|Partner organisations=Environment Agency, London Borough of Sutton, Queen Mary University of London, Thames Water, Defra,
	\|Multi-site=No		\|Multi-site=No
	\|Project picture=~~C GoatbridgeProjectDescription~~.~~jpg~~		\|Project picture=Siltex + Logo.png
	\|Picture description=~~An example of one of~~ the ~~man made structures~~		\|Picture description=Volunteers adding Siltex to Carshalton Ponds in November 2014. Please seek permission from the Wandle Trust to reuse this photograph.
	\|Project summary=~~The~~ overall aim of the ~~project is to improve the ecological potential~~ of the Wandle ~~water bodies by reducing~~ the ~~impact of man-made structures~~ on the ~~river’s ecology, restoring natural features and processes~~ and ~~reducing the impact~~ of urban diffuse pollution.		\|Project summary=This Project is part of a larger scheme with the overall aim of establishing a population of brown trout in the Carshalton arm of the River Wandle for the first time in over 80 years. For more background on this larger scheme, please refer to the parent project "River Wandle Restoration Project".

			The overall aim of this Project was to trial and evaluate innovative control measures for mitigation of urban diffuse pollution in an urban environment.

			The River Wandle turned black with road runoff every time it rained and whilst Environment Agency data did not detect a problem (due to spot sampling rather than continuous monitoring methods), the Trust suspected river sediments were contaminated and the first flush after rain caused fluctuating water quality, likely limiting the successful recruitment of trout.

			The Trust worked with an MSc student from Queen Mary University and confirmed that copper and 15 types of PAH were at a level that would have a severe effect on aquatic biota.

	To reduce urban diffuse pollution, five innovative measures were installed and trialled to determine their effectiveness for mitigation of urban diffuse pollution, particularly road runoff:		To reduce urban diffuse pollution, five innovative measures were installed and trialled to determine their effectiveness for mitigation of urban diffuse pollution, particularly road runoff:

	Rain Gardens installed to intercept surface water and aesthetically enhance an area in Hackbridge.		To reduce urban diffuse pollution, five innovative measures were installed and trialled to determine their effectiveness for mitigation of urban diffuse pollution, particularly road runoff:
	Downstream Defenders (DD) intercept surface water drains and remove sediment by centrifugal ~~forces~~.
	~~Mycofiletrs~~ are bags full of a substrate as a feedstock for the native oyster mushroom which accumulate toxins such as heavy metals from the passing water.		1. Rain Gardens installed to intercept surface water and aesthetically enhance an area in Hackbridge.
	Siltex is a natural chalk like substance which helps to increase the speed of silt breakdown by stimulating natural processes.		2. Downstream Defenders (DD) intercept surface water drains and remove sediment by centrifugal force.
	Smart Sponges are a commercial product specially designed to absorb oils mixed in ~~the~~ water. When placed in gully pots, Smart Sponges can permanently remove oils from the drainage system before they enter the rivers.		3. Mycofilters are bags full of a substrate as a feedstock for the native oyster mushroom which accumulate toxins such as heavy metals from the passing water. A total of 180 mycofilters were made and grown by a team of volunteers, installed in 4 locations on the lower Wandle.
			4. Siltex is a natural chalk-like substance which helps to increase the speed of silt breakdown by stimulating natural processes. Working with local volunteers, Siltex was added to Carshalton Ponds in November 2014 and samples taken for the proceeding months to determine the effectiveness.
			5. Smart Sponges are a commercial product specially designed to absorb oils mixed in water. When placed in gully pots, Smart Sponges can permanently remove oils from the drainage system before they enter the rivers. A total of 23 Smart Sponges were installed in gully pots along the catchment of one surface water drain linking to a DD.



			\|Monitoring surveys and results=For wider project benefits as part of the larger "River Wandle Restoration Scheme" please see the parent project.

			Monitoring was completed for Mycofilters, Siltex, Smart Sponges and Downstream Defenders.

			Downstream Defenders: A Downstream Defender (DD) was monitored using upstream and downstream flow meters and water samples were taken using autosamplers during heavy rainfall events. Samples were sent to a UKAS accredited lab to be analysed, and contaminant load was calculated. The surface water pipe along which the DD was positioned had unexpectedly high flows (up to 50 l/s). When flows were within the operating range of the DD it was effective at removing around 47% of Total Suspended Solids (TSS), however, over the a whole data period it removed 9%. These numbers are within the range found by Dr Thomas Curwell, who investigated multiple rainfall events in DDs and found that they were effective in removing 9-49% TSS. Despite the low removal inefficiencies, the units remain the most effective measure if only a few square meters are available to SERT's knowledge, and are likely to have a cumulatively positive effect. The Trust are currently working on a sediment trap-wetland treatment train in an area where there is more space as an alternative method, following promising results from the scientific literature.

			Mycofilters: Upstream and downstream water samples were taken for Mycofilter sites and control sites (using straw bags with no oyster mushroom).

			Smart Sponges: The concentration of hydrocarbons collected in the gully pots with and without the sponges is being monitored.

			Siltex: Silt and water are being monitored.
	\|Lessons learn=Challenges:		\|Lessons learn=Challenges:

Hazel Wilson at 09:50, 2 November 2015

2015-11-02T09:50:40Z

@@ Line 39: / Line 39: @@
 }}
 {{Site
-|Name=
+|WFD water body code=GB106039017640
+|WFD water body name=Wandle (Carshalton Branch at Carshalton)
+|Heavily modified water body=No
+|Protected species present=No
-|WFD water body code=
+|Invasive species present=No
 }}
 {{Project background

JoshRRC at 09:05, 10 July 2015

2015-07-10T09:05:13Z

← Older revision		Revision as of 09:05, 10 July 2015
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	{{~~Case_study_status~~		{{Case study status
	\|Approval status=		\|Approval status=Approved






	~~Draft~~
	}}		}}
	{{Location		{{Location