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

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The Upper Raba River Spawning Groundsn Erosion control

The Upper Raba River Spawning Groundsn landscape

Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) 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 Edit site 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 Edit project background 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 Edit reasons for restoration Mitigation of a pressure Hydromorphology Channel pattern/planform 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