Case study:Hightown Sand Dune Restoration

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Location: 53° 31' 38", -3° 4' 14"
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Project overview

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Status In progress
Project web site http://www.therrc.co.uk/sites/default/files/projects/59_hightown.pdf
Themes Flood risk management, Habitat and biodiversity, Monitoring, Social benefits
Country England
Main contact forename Graham
Main contact surname Lymbery
Main contact user ID
Contact organisation Sefton Metropolitan Borough Council
Contact organisation web site http://www.sefton.gov.uk/
Partner organisations
Parent multi-site project
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encompassing the following
projects
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Project picture

Project summary

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The sand dunes at Hightown north of Liverpool (Photo 1 and Map 1) were eroding at a rate of 0.5–1m per year. The structure protecting Blundellsands Sailing Club had less than a 10 year life span remaining, and 125 properties and the sailing club were at risk from coastal erosion. Using Section 106 money, a scheme was developed to buy more time by reinstating the dunes to the position they were in 30 years ago. Prior to the project this section of coast was losing, on average, 1,000m3 of sand a year. Post project it is losing the same amount, so by moving 28,000m3 of sand 28 years of time has been bought back.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment



Site

Name
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology
Reference morphology
Desired post project morphology
Heavily modified water body
National/international site designation
Local/regional site designations
Protected species present
Invasive species present
Species of interest
Dominant hydrology
Dominant substrate
River corridor land use
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

Reach length directly affected (m)
Project started
Works started
Works completed
Project completed
Total cost category
Total cost (k€) £1.4m
"£" is not declared as a valid unit of measurement for this property.
Benefit to cost ratio
Funding sources Housing developer

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 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 Sand dune restoration
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

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Supplementary Information

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