Case study:Humber Estuary Erosion Protection Programme

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Location: 53° 44' 38", -0° 19' 42"
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Project overview

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Status Planned
Project web site http://www.therrc.co.uk/sites/default/files/projects/46_humber.pdf
Themes
Country England
Main contact forename Laur
Main contact surname Rhodes
Main contact user ID
Contact organisation Environment Agency
Contact organisation web site http://www.gov.uk/government/organisations/environment-agency
Partner organisations
Parent multi-site project
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projects
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Project summary

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The defences around the Humber Estuary are affected by erosive forces as a result of strong currents and wave actio. These erosive forces cause damage to the defences and over time undermine the stability and integrity of the defences. If not addressed these defences are at risk of breaching, potentially causing significant flooding and risk to life. The Humber Estuary Erosion Protection Programme aims to remediate and manage the erosion caused to the defences. The programme is supported by the Defra-approved Humber Flood Risk Management Strategy. Alongside erosion protection works, the project also aims to achieve Water Framework Directive objectives through the design of schemes that deliver benefits to the environment. The Humber Estuary (Map 1) is home to 921,000 people of whom nearly 400,000 are at risk of flooding, as are important industries, 32,500 business and a significant agricultural sector. The area hosts some of the highest value assets and critical infrastructure in the country, including power stations and refineries, the country’s largest port complex, a petrochemicals industry worth £6 billion per year and approximately 115,000ha of high grade agricultural land. There are some 230km of flood defences protecting the area to various standards of protection.

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Catchment and subcatchment



Site

Name Humber
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology
Reference morphology
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
River corridor land use
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Average bankfull channel width (m)
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Average bankfull channel depth (m)
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Project background

Reach length directly affected (m)
Project started 2017
Works started
Works completed
Project completed
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Total cost (k€)
Benefit to cost ratio
Funding sources Flood Defence Grant-in-Aid

Cost for project phases

Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname
Investigation and design
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Post-project management and maintenance
Monitoring



Reasons for river restoration

Mitigation of a pressure Flood and coastal erosion protection
Hydromorphology
Biology
Physico-chemical
Other reasons for the project


Measures

Structural measures
Bank/bed modifications
Floodplain / River corridor
Planform / Channel pattern
Other Salt marsh and mudflat restoration
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other


Monitoring

Hydromorphological quality elements

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Before measures After measures Qualitative Quantitative

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Physico-chemical quality elements

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Monitoring documents



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Supplementary Information

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