Case study:The Upper Raba River Spawning Grounds

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Location: 49° 49' 47.88" N, 19° 57' 29.99" E

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Project overview

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Status	In progress
Project web site
Themes	Habitat and biodiversity
Country	Poland
Main contact forename	The Upper Raba River Spawning Grounds Project
Main contact surname	The Upper Raba River Spawning Grounds Project
Main contact user ID	User:Arolam
Contact organisation
Contact organisation web site	http://tarliskagornejraby.pl/news.php
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 Raba River is located in southern of Poland and is one of the tributaries of the River Vistula. The restoration was carried out as the aim of reinforcing the corridor boundaries without a disturbing the river channel. The objective of the restoration was to increase retention of flood water avoiding regulation and bank reinforcement, conserving the river habitats and their connectivity focusing on river subjectivity, its features and needs in objective to attain a quasi-natural state of the valley.

Steps and progress of the restoration (technical work)? Erodible corridor on the stem river; Decommissioning of check dams on two tributaries; Monitoring and maintenance of riffles as the features controlling channel conveyance

- Discovered good restoration practices (i.e. techniques, methods, practices)? Preparation of the guidelines ‘Possible technical and biological interventions in mountain river maintenance’ for river managers

Expected results: - Changes in hydromorphological, biological or physico-chemical elements of the watercourse after restoration? Increased habitat heterogeneity in the stem river and tributaries; Enhanced storage of bed material improving the spawning conditions for fish; Re-establishing the longitudinal connectivity of the tributaries; Reduced maximum summer temperatures of the river water; Improved condition of fish populations; Reduced occurrence of invasive alien plant species in the riparian area - Other results (awareness-raising, land purchase, payment for ecosystem services, etc.)? Raising the environmental awareness among river managers and local inhabitants; Arresting and reversal of the tendency to channel incision, in the long-term allowing to re-establish the conditions of geomorphic dynamic equilibrium; Increased retention of flood water in the river reach within the erodible corridor; Re-establishing the formation of early successional stages of riparian plant communities

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	the Vistula River basin
River basin	The Raba River

Subcatchment

River name	The Raba River
Area category	100 - 1000 km²
Area (km2)	644644 km² <br />64,400 ha <br />
Maximum altitude category
Maximum altitude (m)
Dominant geology	Siliceous
Ecoregion
Dominant land cover	Woodland, Extensive agriculture
Waterbody ID

Site

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Name	The Raba River
WFD water body codes
WFD (national) typology
WFD water body name	The Raba River
Pre-project morphology
Reference morphology
Desired post project morphology
Heavily modified water body	No
National/international site designation
Local/regional site designations
Protected species present	No
Invasive species present	No
Species of interest
Dominant hydrology
Dominant substrate
River corridor land use
Average bankfull channel width category	more than 50 m
Average bankfull channel width (m)	6060 m <br />0.06 km <br />6,000 cm <br />
Average bankfull channel depth category	2 - 5 m
Average bankfull channel depth (m)	2.52.5 m <br />0.0025 km <br />250 cm <br />
Mean discharge category
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)
Project started	01/2012
Works started
Works completed
Project completed	2016/12/01
Total cost category	500 - 1000 k€
Total cost (k€)
Benefit to cost ratio
Funding sources	Swiss Contribution to the Enlarged European Union, Association own 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

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Mitigation of a pressure
Hydromorphology	Channel pattern/planform
Biology
Physico-chemical
Other reasons for the project

Measures

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Structural measures
Bank/bed modifications
Floodplain / River corridor
Planform / Channel pattern
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
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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
	Before measures	After measures	Qualitative	Quantitative

Physico-chemical quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
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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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The Upper Raba River Spawning Groundsn Erosion control

The Upper Raba River Spawning Groundsn landscape

Additional documents and videos

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Additional links and references

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Link	Description

Supplementary Information

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