Case study:Shoreham Harbour Shingle Bypassing and Recycling

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Location: 50° 49' 38.97" N, 0° 14' 56.76" W

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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/64_shoreham.pdf
Themes	Flood risk management, Habitat and biodiversity, Social benefits
Country	England
Main contact forename	Tony
Main contact surname	Parker
Main contact user ID
Contact organisation	Shoreham Port
Contact organisation web site	http://www.shoreham-port.co.uk/
Partner organisations	Environment Agency
Parent multi-site project
This is a parent project encompassing the following projects	No

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The harbour arms at the seaward entrance of Shoreham Harbour in West Sussex represent a major obstruction to the natural process of littoral drift along the Sussex coast. Without action, foreshore levels to the east of the harbour would quickly drop to levels that threaten the stability of seawall structures and the build-up of beach material to the west would form a bar across and block the harbour entrance. Shingle bypassing has been carried out every 2 years since 1992. Littoral drift has caused the accumulation of material west of the harbour entrance with a corresponding lowering of beach levels to the east. Shingle transfer operations (see Map 1) have (mostly) prevented the collapse of coastal structures in areas of depletion. Collapse of these structures would rapidly endanger the ability of Shoreham Port, Shoreham Power Station and Shoreham Wastewater Treatment Works to function. A collapse would also threaten the A259 and residential properties behind it.

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Catchment and subcatchment Select a catchment/subcatchment Site Edit 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 Edit project background Reach length directly affected (m) Project started Works started Works completed Project completed Total cost category Total cost (k€) 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 Edit reasons for restoration Mitigation of a pressure Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Floodplain / River corridor Planform / Channel pattern Other Non-structural measures Management interventions Social measures (incl. engagement) Other Monitoring Hydromorphological quality elements Edit Hydromorphological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Physico-chemical quality elements Edit 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 Edit Other responses Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Monitoring documents Upload monitoring documents Additional documents and videos Upload additional documents Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information