Case study:Habitat and water flow restoration on River Rábca

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Location: 47° 26' 2.25" N, 17° 0' 55.40" E

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Project overview

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Status	Complete
Project web site	http://www.edukovizig.hu/projektjeink
Themes	Flood risk management, Habitat and biodiversity, Hydromorphology
Country	Hungary
Main contact forename	István
Main contact surname	Nádor
Main contact user ID
Contact organisation	North-Transdanubian Water Management Directorate titkarsag@edukovizig.hu
Contact organisation web site
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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The aims of the two-phase revitalization were to enhance the water supply of the river under Répcelak, to fit hydraulic structures into the landscape, to restore natural hydrologic conditions, to increase the area of fish habitats and spawning grounds, to establish continuous shading and to ensure the stability of the riverbed on a long term basis by planting of native tree species along the river bank and by strengthening the bank with natural materials.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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Catchment

River basin district	Danube River Basin District
River basin	Danube

Subcatchment

River name	River Rábca (Rabnitz)
Area category	1000 - 10000 km²
Area (km2)
Maximum altitude category	100 - 200 m
Maximum altitude (m)
Dominant geology	Calcareous
Ecoregion	Alps
Dominant land cover	Intensive agriculture, Plantation forestry, Woodland
Waterbody ID

Site

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Name	Rábca
WFD water body codes	AEP904
WFD (national) typology	13
WFD water body name
Pre-project morphology	Single channel, Straight
Reference morphology	Single channel, Sinuous, Pool-riffle
Desired post project morphology
Heavily modified water body	No
National/international site designation	EU - Special Area of Conservation
Local/regional site designations
Protected species present	No
Invasive species present	No
Species of interest
Dominant hydrology	Artificially regulated, Permanent lotic
Dominant substrate	Gravel
River corridor land use	Intensive agriculture (arable), Woodland, Plantation forestry
Average bankfull channel width category
Average bankfull channel width (m)
Average bankfull channel depth category	2 - 5 m
Average bankfull channel depth (m)
Mean discharge category	1 - 10 m³/s
Mean annual discharge (m3/s)
Average channel gradient category
Average channel gradient
Average unit stream power (W/m2)

Project background

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Reach length directly affected (m)	18000 m18 km <br />1,800,000 cm <br />
Project started	2010/10/01
Works started	2011/09/01
Works completed	2012/05/01
Project completed
Total cost category	100 - 500 k€
Total cost (k€)	241 k€241,000 € <br />
Benefit to cost ratio
Funding sources	EU Environment and Energy Operational Program

Cost for project phases

Phase	cost category	cost exact (k€)	Lead organisation	Contact forename	Contact surname
Investigation and design	100 - 500 k€	241 k€241,000 € <br />	SOLVEX LTD. http://www.solvex.hu	Tibor	Kránitz
Stakeholder engagement and communication			Hungarian Ornithological and Nature Conservation Society (MME)
Works and works supervision			Oktaéder Építőipari, Kereskedelmi és Szolgáltató LTD
Post-project management and maintenance
Monitoring

Reasons for river restoration

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Mitigation of a pressure
Hydromorphology	Quantity & dynamics of flow, Continuity for organisms, Structure & condition of riparian zones
Biology	Fish: Species composition, Macrophytes
Physico-chemical	Nutrient concentrations
Other reasons for the project

Measures

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Structural measures
Bank/bed modifications	Removal of reed, Removal of weirs, Removal of small bars
Floodplain / River corridor	Riparian tree planting
Planform / Channel pattern
Other	Removal of fallen trees
Non-structural measures
Management interventions	Ensuring biodiversity
Social measures (incl. engagement)
Other

Monitoring

Hydromorphological quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative

Biological quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
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Physico-chemical quality elements

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quality elements

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	Before measures	After measures	Qualitative	Quantitative

Any other monitoring, e.g. social, economic

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Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative

Monitoring documents

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Image gallery

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Additional documents and videos

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Additional links and references

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Link	Description

Supplementary Information

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