Case study:Pagham Harbour Bypassing

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Location: 50° 45' 57.19" N, 0° 44' 30.04" W

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Project overview

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Status	Complete
Project web site	http://www.therrc.co.uk/sites/default/files/projects/63_pagham.pdf
Themes	Flood risk management, Habitat and biodiversity, Social benefits
Country	England
Main contact forename	Roger
Main contact surname	Spencer
Main contact user ID
Contact organisation	Arun District Council
Contact organisation web site	http://www.arun.gov.uk/
Partner organisations	Environment Agency
Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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The bypassing of shingle beach material from the Church Norton spit onto Pagham Beach in West Sussex (Photo 1 and Map 1) was carried out in 2009 to quickly address the loss of beach sediment from parts of Pagham Beach onto frontages downdrift from which it could not be recycled. • Bypassing was seen as an 'adaptive management' intervention that accelerated the expected future natural sediment movement. • Implementation of bypassing was quicker and cheaper than for beach recharge.

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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€) £43k"£" is not declared as a valid unit of measurement for this property. 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 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 Flood and coastal erosion protection Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Floodplain / River corridor Planform / Channel pattern Other Beach nourishment 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