Case study:Riverlands Porlock Vale Streams

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Location: 51° 12' 17.39" N, 3° 33' 34.52" W

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Project overview

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Status	In progress
Project web site	http://www.nationaltrust.org.uk/our-cause/nature-climate/nature-conservation/riverlands-how-we-keep-our-rivers-flowing#rt-our-work-at-porlock
Themes	Environmental flows and water resources, Flood risk management, Habitat and biodiversity, Hydromorphology, Land use management - agriculture, Monitoring, Social benefits, Water quality
Country	England
Main contact forename	Ben
Main contact surname	Eardley
Main contact user ID	User:eardles
Contact organisation	The National Trust for Places of Historic Interest or Natural Beauty
Contact organisation web site	http://www.nationaltrust.org.uk/
Partner organisations	Environment Agency, Somerset Rivers Authority, Interreg 2 Seas Co-adapt
This is a parent project encompassing the following projects

River Aller Stage 0

Project summary

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A catchment scale programme focusing on restoring natural process in the river systems and landscape to deliver benefits for people and wildlife. The programme encompasses a broad range of work from large river restoration scheme, changes in land management, small scale nature based solutions and innovative engagement activities and tools.

A virtual tour of the estate is being developed which covers some of the work undertaken as well as two immersive audio experiences that allow the listener to learn more about the landscape and its rivers.

http://storage.viewit360.co.uk/national-trust/holnicote-estate

Monitoring surveys and results

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The National Trust owns two complete river systems at Holnicote and has been involved in comprehensive hydrological monitoring for around 15 years. The Riverlands project has built on this legacy and has completed flow and water quality monitoring at key project locations within the catchment. The project will continue to monitor water quality and quantity to determine the effect of nature based solutions deployed at scale. Additional hydromorphological monitoring includes high resolution drone monitoring and remote sensing to provide a baseline of river form, groundwater, water and soil temperature, soil chemistry and organic matter and fluvial transport assessment.

Additionally the project is also monitoring key indicators including (but not limited to) fish, fish habitat, aquatic invertebrates, bats, nesting birds, grass snakes, water vole and butterfly.

Lessons learnt

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Applying nature based solutions in the current consenting and permitting environment is not easy. Water and wildlife need space and the current land management payment systems and permitting and consenting process needs to be changed and/or adapted to reflect more dynamic river systems that are given space to evolve. In certain places within our river systems we need to move from drainage to habitat and the regulatory and funding environment needs to be changed to enable this to happen.

Image gallery

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River Aller Stage 0

Beaver enclosure before and after

File:Virtualtour.jpg

Virtual tour development

File:RRC main.pdf

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 http://storage.viewit360.co.uk/national-trust/holnicote-estate/ Virtual tour of the estate and some of the landscape scale restoration projects Supplementary Information Edit Supplementary Information