Case study:Enler River enhancement project

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Project overview

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Status	Complete
Project web site
Themes	Fisheries, Habitat and biodiversity, Hydromorphology
Country	Northern Ireland
Main contact forename	Judith
Main contact surname	Bankhead
Main contact user ID	User:Judithbankhead
Contact organisation	Rivers Agency, Northern Ireland (DARDNI)
Contact organisation web site	http://www.dardni.gov.uk/rivers
Partner organisations	Rivers Agency, DCAL Inland Fisheries, Castlereagh Borough Council
Parent multi-site project
This is a parent project encompassing the following projects	No

finished reach Enler River

Project summary

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The Enler River is a typical arterially drained channel with laminar flow, regular depth and silt deposition. Compensation money from a fish kill prosecution allowed fishery enhancement measures to be planned and implemented. These included deflector groynes to narrow the channel and creat a thalweg, addition of spawning gravels and plums, and the creation of deeper water via a small cross river groyne

Monitoring surveys and results

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Pre works fishery assessment and river habitat assessment were carried out, along with photographs. Post works photographs have been taken and this will continue. One year plus fishery assessment and habitat assessment planned for 2015.

Lessons learnt

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Opportunisitc work due to compensation monies and public land ownership. The proximity of the Greenway cycle way, and high value market gardening land meant that the reach length had to be limited, and work constrained within the current channel dimensions. Lunkers that had been obtained for inlcusion in the scheme could not be used due to size issues - used elsewhere.

Image gallery

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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