Case study:Broadwater Brook - Revision history

Ascarr: Ascarr moved page Case study:Broadwater Brook 2 to Case study:Broadwater Brook

2021-08-24T15:35:05Z

Ascarr moved page Case study:Broadwater Brook 2 to Case study:Broadwater Brook

← Older revision	Revision as of 15:35, 24 August 2021
(No difference)

Ascarr at 15:17, 24 August 2021

2021-08-24T15:17:42Z

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	\|Partner organisations=Sompting Estate Trust, Environment Agency SSD, Heritage Lottery Fund,		\|Partner organisations=Sompting Estate Trust, Environment Agency SSD, Heritage Lottery Fund,
	\|Multi-site=No		\|Multi-site=No
	\|Project picture=~~009~~.~~jpeg~~		\|Project picture=New River Channel1.jpg
			\|Picture description=New River Channel
	\|Project summary=This urban chalk stream project has realigned the course of the Broadwater Brook, removing it from underground pipes and setting a new route through agricultural fields. Previously degraded from pollution entering from industrial areas and the main road network we have installed sediment traps at the upstream extent and have ensured vegetation establishment in the channel to further filter pollutants. Allowing for low flows (as a ephemeral stream) the stream is narrow with marginal shelves to provide wetland habitat whilst being flooded during heavy rainfall. The surrounding land has been transformed from arable maize fields into 6.9ha of wildflower meadow with 2.2km of new hedgerow and 500 trees forming a shaw woodland. Additional habitat in the form of three ponds, a re-wilding zone and scrapes have been formed along the riparian zone. The project tackled land contamination from neighbouring landfill along with accumulations of arsenic from previous land use. A mains sewer was realigned and mitigation for a chemical effluent pipe and mains power cable were also needed to complete the project which also had to content with a 1:3000 gradient and artificially raised ground through the centre of the site.		\|Project summary=This urban chalk stream project has realigned the course of the Broadwater Brook, removing it from underground pipes and setting a new route through agricultural fields. Previously degraded from pollution entering from industrial areas and the main road network we have installed sediment traps at the upstream extent and have ensured vegetation establishment in the channel to further filter pollutants. Allowing for low flows (as a ephemeral stream) the stream is narrow with marginal shelves to provide wetland habitat whilst being flooded during heavy rainfall. The surrounding land has been transformed from arable maize fields into 6.9ha of wildflower meadow with 2.2km of new hedgerow and 500 trees forming a shaw woodland. Additional habitat in the form of three ponds, a re-wilding zone and scrapes have been formed along the riparian zone. The project tackled land contamination from neighbouring landfill along with accumulations of arsenic from previous land use. A mains sewer was realigned and mitigation for a chemical effluent pipe and mains power cable were also needed to complete the project which also had to content with a 1:3000 gradient and artificially raised ground through the centre of the site.

Ascarr at 15:14, 24 August 2021

2021-08-24T15:14:17Z

← Older revision		Revision as of 15:14, 24 August 2021
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	\|Partner organisations=Sompting Estate Trust, Environment Agency SSD, Heritage Lottery Fund,		\|Partner organisations=Sompting Estate Trust, Environment Agency SSD, Heritage Lottery Fund,
	\|Multi-site=No		\|Multi-site=No
	\|Project picture=~~New River Channel~~		\|Project picture=009.jpeg
	\|Project summary=This urban chalk stream project has realigned the course of the Broadwater Brook, removing it from underground pipes and setting a new route through agricultural fields. Previously degraded from pollution entering from industrial areas and the main road network we have installed sediment traps at the upstream extent and have ensured vegetation establishment in the channel to further filter pollutants. Allowing for low flows (as a ephemeral stream) the stream is narrow with marginal shelves to provide wetland habitat whilst being flooded during heavy rainfall. The surrounding land has been transformed from arable maize fields into 6.9ha of wildflower meadow with 2.2km of new hedgerow and 500 trees forming a shaw woodland. Additional habitat in the form of three ponds, a re-wilding zone and scrapes have been formed along the riparian zone. The project tackled land contamination from neighbouring landfill along with accumulations of arsenic from previous land use. A mains sewer was realigned and mitigation for a chemical effluent pipe and mains power cable were also needed to complete the project which also had to content with a 1:3000 gradient and artificially raised ground through the centre of the site.		\|Project summary=This urban chalk stream project has realigned the course of the Broadwater Brook, removing it from underground pipes and setting a new route through agricultural fields. Previously degraded from pollution entering from industrial areas and the main road network we have installed sediment traps at the upstream extent and have ensured vegetation establishment in the channel to further filter pollutants. Allowing for low flows (as a ephemeral stream) the stream is narrow with marginal shelves to provide wetland habitat whilst being flooded during heavy rainfall. The surrounding land has been transformed from arable maize fields into 6.9ha of wildflower meadow with 2.2km of new hedgerow and 500 trees forming a shaw woodland. Additional habitat in the form of three ponds, a re-wilding zone and scrapes have been formed along the riparian zone. The project tackled land contamination from neighbouring landfill along with accumulations of arsenic from previous land use. A mains sewer was realigned and mitigation for a chemical effluent pipe and mains power cable were also needed to complete the project which also had to content with a 1:3000 gradient and artificially raised ground through the centre of the site.

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	We have also been monitoring impacts on the local community and results show a better appreciation and understanding of the water environment, that co-design and delivery has ensured guardianship of the site into the future and that providing outdoor opportunities in heavily urbanised areas is of great value to wellbeing and community cohesion. All results of the project will be available on the website from January 2022 - www.oart.org.uk/epic		We have also been monitoring impacts on the local community and results show a better appreciation and understanding of the water environment, that co-design and delivery has ensured guardianship of the site into the future and that providing outdoor opportunities in heavily urbanised areas is of great value to wellbeing and community cohesion. All results of the project will be available on the website from January 2022 - www.oart.org.uk/epic
	\|Lessons learn=We used local contractors to provide ECI assistance during the development of designs, this resulted in large costs increases (even from the ECI) at tender and we would ensure that more consideration is given to the right contractor providing this advice from the beginning of the project.		\|Lessons learn=*We used local contractors to provide ECI assistance during the development of designs, this resulted in large costs increases (even from the ECI) at tender and we would ensure that more consideration is given to the right contractor providing this advice from the beginning of the project.
	Relied on existing relationships and partnerships to provide solutions to constraints on site which meant no legal framework was in place for agreed actions and organizations changed their approach to elements of the project at the last minute. In future we would ensure that legal agreements are in place around service mitigation prior to appointing a contractor.
	We did not appreciate or appropriately consider the ground contamination constraints at an early enough stage. A lack of prior experience of these issues and relying on previous reports led to misunderstanding the costs and constraints this would cause. For future projects we would ensure, where potential land contamination is present, that early involvement of experts is obtained, and budgets reflect possible additional costs.		*Relied on existing relationships and partnerships to provide solutions to constraints on site which meant no legal framework was in place for agreed actions and organizations changed their approach to elements of the project at the last minute. In future we would ensure that legal agreements are in place around service mitigation prior to appointing a contractor.
	We have also learnt that, through perseverance, projects which many believe to be unachievable due to costs and constraints can be delivered in a manner which is cost beneficial and provide multiple benefits to people and wildlife.
			*We did not appreciate or appropriately consider the ground contamination constraints at an early enough stage. A lack of prior experience of these issues and relying on previous reports led to misunderstanding the costs and constraints this would cause. For future projects we would ensure, where potential land contamination is present, that early involvement of experts is obtained, and budgets reflect possible additional costs.

			*We have also learnt that, through perseverance, projects which many believe to be unachievable due to costs and constraints can be delivered in a manner which is cost beneficial and provide multiple benefits to people and wildlife.
	\|Project title=Broadwater Brook		\|Project title=Broadwater Brook
	}}		}}

Ascarr at 15:12, 24 August 2021

2021-08-24T15:12:15Z

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	{{Case study status		{{Case study status
	\|Approval status=~~Draft~~		\|Approval status=Approved
	}}		}}
	{{Location		{{Location

Oartpk at 15:43, 19 August 2021

2021-08-19T15:43:04Z

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Oartpk at 15:39, 19 August 2021

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Oartpk at 15:38, 19 August 2021

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Oartpk at 15:37, 19 August 2021

2021-08-19T15:37:24Z

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	{{Hydromorphological quality elements header}}		{{Hydromorphological quality elements header}}
			{{Hydromorphological quality element table row
			\|Element=Continuity of sediment transport
			\|Monitored before=Yes
			\|Monitored after=Yes
			\|Qualitative monitoring=No
			\|Quantitative monitoring=Yes
			\|Control site used=No
			\|Result=Improvement
			}}
	{{End table}}		{{End table}}
	{{Biological quality elements header}}		{{Biological quality elements header}}

Oartpk at 15:36, 19 August 2021

2021-08-19T15:36:05Z

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	\|Other motivation=Recreation,		\|Other motivation=Recreation,
	}}		}}
	{{Measures}}		{{Measures
			\|Bank and bed modifications measure=Channel realignment,
			\|Floodplain / River corridor=Channel realignment, Conservation measures and environmental improvement, Creation of multi stage channel, Habitat creation,
			\|Planform / Channel pattern=Channel realignment, Creation of new channel, Habitat creation, Habitat restoration, Improvement of channel morphology,
			\|Management interventions=Agricultural business changed its way of working, Arable reversion to wildflower meadow, Clean-up days, Diffuse pollution mitigation, Easier management, Ensuring biodiversity, Monitoring strategy,
			\|Social measures=Active involvement of local interests groups and land owners, Agreement with the owners, Awareness raising, Awareness raising by a sign, Citizen participation in the restoration project, Community Education, Community Events, Community Litter-picking work, Community based management, Community consultation, Community education (talks and workshops, Community involvement, Creation of a path alongside the river, Decreased flood risk, Engagement with a wide range of stakeholders, Engagement with schools, Improved public access, Information panels for people,
			}}
	{{Hydromorphological quality elements header}}		{{Hydromorphological quality elements header}}
	{{End table}}		{{End table}}

Oartpk at 15:29, 19 August 2021

2021-08-19T15:29:51Z

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	{{Motivations		{{Motivations
	\|Hydromorphological quality elements=~~Hydrological regime~~		\|Hydromorphological quality elements=Continuity of sediment transport,
	\|Biological quality elements=Fish, Invertebrates,		\|Biological quality elements=Fish, Invertebrates,
	\|Physico-chemical quality elements=Nutrient concentrations, Oxygen balance,		\|Physico-chemical quality elements=Nutrient concentrations, Oxygen balance,