Case study:Darent Valley Path

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Location: 51° 26' 5.55" N, 0° 13' 29.03" E

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Project overview

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Status	Complete
Project web site
Themes
Country	England
Main contact forename	Emma
Main contact surname	Hazard
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Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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To re-distribute the existing bed material to create meanders, pool - riffle sequences, gravel bars and islands. The aim is to acheive a chalk river with a variety of habitats within a low-flow, self cleansing, sinuous channel. Improve fish spawning habitat. The river in this location is generally flat, wide and shallow and under normal discharge it cannot sustain energised flow. Additionally, the channel is extremely heavily shaded in parts, preventing aquatic plant growth. There is very little in-channel natural habitat variation and the river has no ability to re-habilitate itself and re-establish chalk stream habitat.

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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) 900 m0.9 km <br />90,000 cm <br /> Project started 2011/01/01 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