Case study:River Alt at Knowsley

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Location: 53° 25' 39.05" N, 2° 51' 16.79" W

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Project overview

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Status	Complete
Project web site
Themes	Fisheries, Flood risk management, Habitat and biodiversity, Water quality
Country	England
Main contact forename	Sue
Main contact surname	Slamon
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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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 Alt, Knowsley
WFD water body codes	GB112069060580
WFD (national) typology
WFD water body name
Pre-project morphology	Artificial channel, Straightened, Over-widened, resectioned
Reference morphology	Braided
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	Clay
River corridor land use	Urban
Average bankfull channel width category
Average bankfull channel width (m)
Average bankfull channel depth category
Average bankfull channel depth (m)
Mean discharge category
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Project background

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Cost for project phases

Phase	cost category	cost exact (k€)	Lead organisation	Contact forename	Contact surname
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Reasons for river restoration

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Mitigation of a pressure
Hydromorphology
Biology
Physico-chemical
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Measures

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Structural measures
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Floodplain / River corridor
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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

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Physico-chemical quality elements

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quality elements

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Any other monitoring, e.g. social, economic

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Monitoring documents

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Image gallery

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River Alt prior to works

Vegetated channel threads

Diverse vegetation structure

Newly excavated floodplain area

Floodplain area - 2012

One of choked braided side channels - 2012

Issues with urban litter evident - 2012

Additional documents and videos

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Additional links and references

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Supplementary Information

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