Case study:River Wid restoration scheme: Difference between revisions

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{{Case study status
{{Case study status
|Approval status=Draft
|Approval status=Approved
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{{Location
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{{Project overview
{{Project overview
|Project title=River Wid restoration scheme
|Status=Complete
|Status=Complete
|Themes=Flood risk management, Habitat and biodiversity, Hydromorphology
|Themes=Flood risk management, Habitat and biodiversity, Hydromorphology
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|Contact organisation url=www.environment-agency.gov.uk
|Contact organisation url=www.environment-agency.gov.uk
|Multi-site=No
|Multi-site=No
|Project summary=The river restoration has introduced habitat features which will lead to the restoration of the hydromorphology of the WFD watercourse. Priority species this project may benefit include water voles and eels.
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{{Case study subcatchment
{{Case study subcatchment
|Subcatchment=Combined Essex
|Subcatchment=Wid (Ingatestone Hall - Margaretting Hall)
}}
{{Site
|Name=River Wid
|WFD water body code=GB105037028690
|WFD (national) typology=Low, Small, Calcareous
|WFD water body name=Wid
|Pre-project morphology=Sinuous,
|Reference morphology=Sinuous,
|Heavily modified water body=Yes
|Protected species present=No
|Invasive species present=Yes
|Dominant hydrology=Groundwater,
|Dominant substrate=Gravel, Clay,
|River corridor land use=Intensive agriculture (arable),
|Avrg bankfull channel width=8
|Avrg1 bankfull channel depth=1.5
}}
{{Project background
|Reach length directly affected=1400
|Project started=2012/09/01
|Works started=2012/10/01
|Works completed=2012/11/01
|Project completed=2013/12/01
|Total cost category=10 - 50 k€
|Funding sources=Flood and Coastal Risk Management
}}
{{Motivations
|Specific mitigation=Flood risk management,
|Hydromorphological quality elements=Continuity of sediment transport, Channel pattern/planform, Width & depth variation,
|Biological quality elements=Fish, Invertebrates, Macrophytes,
|Physico-chemical quality elements=Nutrient concentrations, dissolve oxygen, pH,
}}
{{Measures
|Bank and bed modifications measure=Adding sinuosity,
|Floodplain / River corridor=Floodplain reconnection,
|Planform / Channel pattern=Channel narrowing,
}}
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{{Site}}
{{Project background}}
{{Motivations}}
{{Measures}}
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{{Hydromorphological quality elements header}}
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Latest revision as of 11:00, 31 May 2017

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Location: 51° 39' 48.95" N, 0° 24' 3.76" E
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Project overview

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Status Complete
Project web site
Themes Flood risk management, Habitat and biodiversity, Hydromorphology
Country England
Main contact forename Tim
Main contact surname Gardiner
Main contact user ID
Contact organisation Environment Agency
Contact organisation web site http://www.environment-agency.gov.uk
Partner organisations
Parent multi-site project
This is a parent project
encompassing the following
projects
No
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Project summary

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The river restoration has introduced habitat features which will lead to the restoration of the hydromorphology of the WFD watercourse. Priority species this project may benefit include water voles and eels.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

Catchment

River basin district Anglian
River basin Combined Essex

Subcatchment

River name Wid (Ingatestone Hall - Margaretting Hall)
Area category 10 - 100 km²
Area (km2)
Maximum altitude category Less than 100 m
Maximum altitude (m) 9696 m <br />0.096 km <br />9,600 cm <br />
Dominant geology Calcareous
Ecoregion Great Britain
Dominant land cover Arable and Horticulture
Waterbody ID GB105037028690



Site

Name River Wid
WFD water body codes GB105037028690
WFD (national) typology Low, Small, Calcareous
WFD water body name Wid
Pre-project morphology Sinuous
Reference morphology Sinuous
Desired post project morphology
Heavily modified water body Yes
National/international site designation
Local/regional site designations
Protected species present No
Invasive species present Yes
Species of interest
Dominant hydrology Groundwater
Dominant substrate Gravel, Clay
River corridor land use Intensive agriculture (arable)
Average bankfull channel width category
Average bankfull channel width (m) 88 m <br />0.008 km <br />800 cm <br />
Average bankfull channel depth category
Average bankfull channel depth (m) 1.51.5 m <br />0.0015 km <br />150 cm <br />
Mean discharge category
Mean annual discharge (m3/s)
Average channel gradient category
Average channel gradient
Average unit stream power (W/m2)


Project background

Reach length directly affected (m) 14001,400 m <br />1.4 km <br />140,000 cm <br />
Project started 2012/09/01
Works started 2012/10/01
Works completed 2012/11/01
Project completed 2013/12/01
Total cost category 10 - 50 k€
Total cost (k€)
Benefit to cost ratio
Funding sources Flood and Coastal Risk Management

Cost for project phases

Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname
Investigation and design
Stakeholder engagement and communication
Works and works supervision
Post-project management and maintenance
Monitoring



Reasons for river restoration

Mitigation of a pressure Flood risk management
Hydromorphology Continuity of sediment transport, Channel pattern/planform, Width & depth variation
Biology Fish, Invertebrates, Macrophytes
Physico-chemical Nutrient concentrations, dissolve oxygen, pH
Other reasons for the project


Measures

Structural measures
Bank/bed modifications Adding sinuosity
Floodplain / River corridor Floodplain reconnection
Planform / Channel pattern Channel narrowing
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other


Monitoring

Hydromorphological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

Biological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

Physico-chemical quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

Any other monitoring, e.g. social, economic

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative


Monitoring documents



Additional documents and videos


Additional links and references

Link Description

Supplementary Information

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