Case study:River Dearne at Mexborough

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Location: 53° 30' 14.25" N, 1° 15' 20.14" W

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Project overview

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Status	Complete
Project web site
Themes	Fisheries, Flood risk management, Habitat and biodiversity
Country	England
Main contact forename	Chris
Main contact surname	Firth
Main contact user ID
Contact organisation	Don Catchment Rivers Trust
Contact organisation web site	http://www.dcrt.org.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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Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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Site

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Name	River Dearne at Mexborough
WFD water body codes	GB104027063173
WFD (national) typology
WFD water body name
Pre-project morphology	Straightened, Over-widened, Uniform
Reference morphology	Sinuous, narrower low flow channel
Desired post project morphology
Heavily modified water body	No
National/international site designation
Local/regional site designations
Protected species present	No
Invasive species present	No
Species of interest
Dominant hydrology
Dominant substrate	Gravel
River corridor land use	Agriculture (arable)
Average bankfull channel width category
Average bankfull channel width (m)
Average bankfull channel depth category
Average bankfull channel depth (m)
Mean discharge category
Mean annual discharge (m3/s)
Average channel gradient category
Average channel gradient
Average unit stream power (W/m2)

Project background

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Reach length directly affected (m)	500500 m <br />0.5 km <br />50,000 cm <br />
Project started	1995/05/01
Works started
Works completed
Project completed	1995/09/01
Total cost category	10 - 50 k€
Total cost (k€)	£43,000"£" is not declared as a valid unit of measurement for this property.
Benefit to cost ratio
Funding sources

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

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Mitigation of a pressure
Hydromorphology	Channel pattern/planform
Biology	Fish
Physico-chemical
Other reasons for the project

Measures

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Structural measures
Bank/bed modifications	Adding sinuosity
Floodplain / River corridor	Creation of backwaters
Planform / Channel pattern	Backwaters created, Channel narrowing
Other
Non-structural measures
Management interventions	Reduced maintenance (est. £2, 500-£3, 000 reduction in maintenance costs per year)
Social measures (incl. engagement)
Other

Monitoring

Hydromorphological quality elements

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quality elements

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

Biological quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative
Fish: Abundance	Yes	Yes	Yes	Yes	No	Improvement

Physico-chemical quality elements

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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

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

Monitoring documents

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Image gallery

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Additional documents and videos

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Additional links and references

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Link	Description
http://www.therrc.co.uk/pdf/manual/MAN 3 6.pdf	RRC Manual of River Restoration Techniques entry

Supplementary Information

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