Case study:River Avon at East Chisenbury

This case study is pending approval by a RiverWiki administrator.

Approve case study

 

0.00

(0 votes)

To discuss or comment on this case study, please use the discussion page.

Location: 51° 16' 12.00" N, 1° 48' 32.36" W

Edit location

Loading map...

{"format":"googlemaps3","type":"HYBRID","minzoom":false,"maxzoom":false,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"limit":50,"offset":0,"link":"all","sort":[""],"order":[],"headers":"show","mainlabel":"","intro":"","outro":"","searchlabel":"... further results","default":"","import-annotation":false,"width":"auto","height":"400px","centre":false,"title":"","label":"","icon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"visitedicon":"","wmsoverlay":false,"zoom":14,"layers":[],"controls":["pan","zoom","type","scale","streetview","rotate"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"resizable":false,"kmlrezoom":false,"poi":true,"cluster":false,"clustergridsize":60,"clustermaxzoom":20,"clusterzoomonclick":true,"clusteraveragecenter":true,"clusterminsize":2,"imageoverlays":[],"kml":[],"gkml":[""],"searchmarkers":"","fullscreen":false,"scrollwheelzoom":false,"showtitle":false,"hidenamespace":true,"template":"Location map popup","userparam":"","activeicon":"","pagelabel":false,"ajaxcoordproperty":"","ajaxquery":"","locations":[{"text":"\u003Cp\u003E\u003Cbr /\u003E\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003EProject Title:\u003C/b\u003E River Avon at East Chisenbury\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003ECountry:\u003C/b\u003E \u003Ca href=\"/wiki/index.php?title=England\" title=\"England\"\u003EEngland\u003C/a\u003E\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003EProject Status:\u003C/b\u003E Complete\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003EThemes:\u003C/b\u003E Spatial planning\n\u003C/p\u003E\u003Cp\u003E\u003Cbr /\u003E\n\u003C/p\u003E","title":"River Avon at East Chisenbury","link":"","lat":51.27,"lon":-1.80899,"icon":"/wiki/images/a/af/Red_marker.png"}]}

Left click to look around in the map, and use the wheel of your mouse to zoom in and out.

Project overview

Edit project overview

Status	Complete
Project web site
Themes	Flood risk management, Habitat and biodiversity, Monitoring, Social benefits, Spatial planning
Country	England
Main contact forename	Ruth
Main contact surname	Clarricoates
Main contact user ID
Contact organisation	Natural England
Contact organisation web site
Partner organisations	Wiltshire Chalk Streams, Environment Agency, Wessex Water, Natural England, Wiltshire Wildlife Trust, Chisenbury Fishing Syndicate.
This is a parent project encompassing the following projects

Post-restoration channel - berm feature installed to narrow channel. Courtesy of the River Restoration Centre.

Project summary

This case study hasn’t got any project summary, you can add some by editing the project overview.

Monitoring surveys and results

This case study hasn’t got any Monitoring survey and results, you can add some by editing the project overview.

Lessons learnt

This case study hasn’t got any lessons learnt, you can add some by editing the project overview.

Catchment and subcatchment

Select a catchment/subcatchment

Edit the catchment and subcatchment details
(affects all case studies in this subcatchment)

Catchment

River basin district	South West
River basin	South Devon

Subcatchment

River name	Avon
Area category	10 - 100 km²
Area (km2)
Maximum altitude category	500 - 1000 m
Maximum altitude (m)	513513 m <br />0.513 km <br />51,300 cm <br />
Dominant geology	Siliceous
Ecoregion	Great Britain
Dominant land cover	Improved grassland
Waterbody ID	GB108046004940

Site

Edit site

Name	East Chisenbury
WFD water body codes	GB108043022350
WFD (national) typology	Low, Medium, Calcareous
WFD water body name	Hampshire Avon (East)
Pre-project morphology	High width:depth, Single channel
Reference morphology	Sinuous, Pool-riffle
Desired post project morphology
Heavily modified water body	Yes
National/international site designation	EU - Special Area of Conservation
Local/regional site designations	SSSI (Site of Special Scientific Interest)
Protected species present	No
Invasive species present	No
Species of interest
Dominant hydrology	Quick run-off, Groundwater
Dominant substrate	Gravel
River corridor land use	Extensive agriculture, Urban
Average bankfull channel width category	5 - 10 m
Average bankfull channel width (m)
Average bankfull channel depth category	0.5 - 2 m
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)	720 m0.72 km <br />72,000 cm <br />
Project started	2005/01/01
Works started	2006/01/01
Works completed	2009/01/01
Project completed
Total cost category	100 - 500 k€
Total cost (k€)	120 k€120,000 € <br />
Benefit to cost ratio
Funding sources	Wessex Chalk Streams Project, Environment Agency

Cost for project phases

Phase	cost category	cost exact (k€)	Lead organisation	Contact forename	Contact surname
Investigation and design			Environment Agency
Stakeholder engagement and communication			Environment Agency
Works and works supervision			Environment Agency
Post-project management and maintenance
Monitoring

Reasons for river restoration

Edit reasons for restoration

Mitigation of a pressure	Flood defence
Hydromorphology	Width & depth variation, Flow velocities, Substrate conditions, Channel pattern/planform
Biology	Fish: Abundance, Invertebrates: Abundance, Macrophytes
Physico-chemical
Other reasons for the project	Bank erosion, Habitat enhancement

Measures

Edit Measures

Structural measures
Bank/bed modifications	Introduction of LWD, Deflectors, Tree works, Bed raising using hurdle, Marginal planting
Floodplain / River corridor	Reconnection to the riparian zone
Planform / Channel pattern	Narrowing, Introduction of LWD deflectors
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
Width & depth variation		Yes	Yes			Improvement
Flow velocities		Yes	Yes			Improvement
Substrate conditions		Yes	Yes			Improvement

Biological quality elements

Edit biological
quality elements

Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative
Fish: Abundance	Yes	Yes		Yes		Improvement
Macrophytes	Yes	Yes		Yes		Improvement
Invertebrates: Abundance	Yes	Yes		Yes		Improvement

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
Public use		Yes	Yes			Improvement

Monitoring documents

Upload monitoring documents

Image gallery

Edit Image gallery

Additional documents and videos

Upload additional documents

Wessex Chalk Streams

Additional links and references

Edit links and references

Link	Description
http://publications.environment-agency.gov.uk/pdf/GESW0910BSTR-E-E.pdf	WFD Status for Hampshire Avon (Middle) - See P. 1308.

Supplementary Information

Edit Supplementary Information