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	Planned
Project web site
Themes	Economic aspects, Habitat and biodiversity
Country	England
Main contact forename	Emma
Main contact surname	Hazard
Main contact user ID
Contact organisation
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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 Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district Thames River basin Darent Subcatchment River name Mid Darent Area category 100 - 1000 km² Area (km2) Maximum altitude category 200 - 500 m Maximum altitude (m) 244244 m <br />0.244 km <br />24,400 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Arable and Horticulture Waterbody ID GB106040024222 Other case studies in this subcatchment: Lullingstone Castle, Lullingstone Castle phase 2, River Darent at Hawley Manor Site Edit site Name WFD water body codes GB106040024222 WFD (national) typology WFD water body name Mid Darent 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 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 10 - 50 k€ Total cost (k€) Benefit to cost ratio Funding sources Environment Agency Working in parnership with Dartford Borough Council who are upgrading the footpath alonside the river. 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 Channel pattern/planform, Quantity & dynamics of flow, Substrate conditions Biology Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Bank reprofiling Floodplain / River corridor Planform / Channel pattern Creation of meanders 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