Case study:Dysart Park, Grantham Habitat Improvement

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Location: 52° 54' 10.45" N, 0° 37' 44.31" W

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Project overview

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Status	Complete
Project web site
Themes	Habitat and biodiversity
Country	England
Main contact forename	Gail
Main contact surname	Hutchinson
Main contact user ID
Contact organisation	East Mercia Rivers Trust
Contact organisation web site	http://Environment%20Agency
Partner organisations	Environment Agency
Parent multi-site project	Upper Witham Restoration
This is a parent project encompassing the following projects	No

Project after establishment and naturalisation.

Project summary

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The Upper Witham is the ground water fed headwaters of the Witham supporting important species including Native Crayfish and Brown Trout. Historic changes to the river for milling and land drainage have however degraded habitat especially in urban areas such as Grantham.

The project aimed to restore habitat in an over widened, shaded section of river running alongside a public park in the town. This was done by hinging trees to form berms which helped to narrow the channel and provide lighter. As well as benefiting the habitat, this made the river more visible to near-by residents and park users.

This work reduced the need for EA maintenance of the trees in this section of river.

Monitoring surveys and results

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Lessons learnt

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Plan ahead where native Crayfish could be impacted by a project. Ensure you have the necessary permissions to survey for them and where necessary relocate from the project site.

This project also planned to install a rock ramp on a weir downstream, but this could not be taken forward due to site access during Covid.

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