Case study:Sainsburys, Hertford

From RESTORE
Jump to: navigation, search
This case study is pending approval by a RiverWiki administrator.
Approve case study

 

0.00
(0 votes)


To discuss or comment on this case study, please use the discussion page.


Location: 51° 47' 53", -0° 4' 48"
Edit location
Loading map...
Left click to look around in the map, and use the wheel of your mouse to zoom in and out.


Project overview

Edit project overview
Status Complete
Project web site
Themes Flood risk management, Habitat and biodiversity
Country England
Main contact forename Sarah
Main contact surname Smith
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
This is a parent project
encompassing the following
projects
No
This case study hasn’t got a picture, you can add one by editing the project overview.

Project summary

Edit project overview to modify the project summary.


Removal of sheet steel piling and reprofiling and naturalisation of the bank for 120m. Remaining sheet piling which cannot be removed will be brick clad and coir rolls placed at base of piling. Redevelopment of site for a Sainsburys supermarket on the banks of the River Lee.
Funding and commitment to delivery. Flood Defence Consent has been granted and works are due to start on site imminently; Expected duration of works is 2 months.

Monitoring surveys and results

This case study hasn’t got any Monitoring survey and results, you can add some by editing the project overview.

Lessons learnt

This case study hasn’t got any lessons learnt, you can add some by editing the project overview.


Image gallery


ShowHideAdditionalImage.png


Catchment and subcatchment

Catchment

River basin district Thames
River basin Upper Lee

Subcatchment

River name Lee Navigation (Hertford and Ware)
Area category 100 - 1000 km²
Area (km2)
Maximum altitude category 100 - 200 m
Maximum altitude (m) 113
113 m
0.113 km
11,300 cm
Dominant geology Calcareous
Ecoregion Great Britain
Dominant land cover Improved grassland
Waterbody ID GB106038033240



Other case studies in this subcatchment: Amwell Loop


Site

Name
WFD water body codes GB106038033240
WFD (national) typology
WFD water body name Lee Navigation (Hertford and Ware)
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
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) 150 m
0.15 km
15,000 cm
Project started 2011/01/01
Works started
Works completed 2011/01/01
Project completed
Total cost category 500 - 1000 k€
Total cost (k€)
Benefit to cost ratio
Funding sources Private developers

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 Riparian development
Hydromorphology
Biology
Physico-chemical
Other reasons for the project


Measures

Structural measures
Bank/bed modifications Bank reprofiling, Installation of coir rolls, Removing of sheet piling
Floodplain / River corridor
Planform / Channel pattern
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

Edit Supplementary Information