Case study:Restoring connectivity of the ecological corridor in the Biała River valley

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Location: 49° 37' 32", 20° 56' 56"
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Project overview

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Status Complete
Project web site http://www.losos.org.pl
Themes Fisheries, Habitat and biodiversity
Country Poland
Main contact forename Regionalny Zarząd Gospodarki Wodnej w Krakowie
Main contact surname Regionalny Zarząd Gospodarki Wodnej w Krakowie
Main contact user ID User:Arolam
Contact organisation Regional Water Management Board in Kraków
Contact organisation web site http://www.krakow.rzgw.gov.pl/
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 biala river has been restored since 2010 as the aim of improving the habitat conditions for riverine and riparian biota in the Biała valley including the restoration of longitudinal river connectivity, reintroduction of Atlantic salmon population and increasing the size and range of thick-shelled river mussel and yellow-bellied toad populations.

The project encompasses 6 tasks: 1) Removing barriers to water organisms migration in the river 2) Reintroducing salmon population to the river 3) Delimiting the erodible river corridor and establishing conditions for its functioning 4) Restoring integrity and re-colonization of the bivalve population in the river basin 5) Restoring the continuity of amphibian populations in the river valley 6) Restoring riparian vegetation


Technical works includes construction of fish passes at four concrete weirs, re-establishing migration possibilities for river biota, designing fish passes at the location of 10 other weirs, releasing 1,2 million unfed fry of Atlantic salmon, establishing erodible river corridor along 20 km-long sections of the Biała valley, increased area and continuity of riparian shrubs/forest along the river; reduction in the occurrence of invasive plant species in the riparian area

The project is complex approach to restoration of the ecological integrity of a mountain valley corridor, encompassing restoration measures focused on the habitat conditions in the river and riparian area as well as on the populations of selected, threatened species.

Works included: Delimiting the erodible river corridor and establishing conditions for its functioning.

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Lessons learnt

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Catchment and subcatchment



Site

Name The Biala River
WFD water body codes
WFD (national) typology
WFD water body name
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 Atlantic salmon, thick-shelled river mussel, yellow-bellied toad
Dominant hydrology
Dominant substrate Cobble to pebble in the upper and middle river course; gravel to sand in the lower course
River corridor land use Extensive agriculture, grassland and riparian forest
Average bankfull channel width category 10 - 50 m
Average bankfull channel width (m) 45m
0.045 km
4,500 cm
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

Reach length directly affected (m)
Project started 2012/04/01
Works started
Works completed
Project completed 2014/03/31
Total cost category
Total cost (k€) 4 833 217
4,833,217 k€
4,833,217,000 €
Benefit to cost ratio
Funding sources 85% covered by the European Union Development Fund under the Infrastructure and Environment Programme, 15% by the Ministry of Environment of Poland

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

Mitigation of a pressure Riparian development, Impoundments (not hydropower)
Hydromorphology Continuity for organisms, Structure & condition of riparian/lake shore zones
Biology Invertebrates: Disturbance-sensitive species, Fish: Disturbance-sensitive species
Physico-chemical
Other reasons for the project


Measures

Structural measures
Bank/bed modifications Restoring riparian vegetation, Bank stabilisation
Floodplain / River corridor Restoring riparian vegetation
Planform / Channel pattern Removing barriers to water organisms migration in the river
Other Reintroducing salmon population to the river, Restoring integrity and re-colonization of the bivalve population in the river basin, Restoring the continuity of amphibian populations in the river valley
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other


Monitoring

Hydromorphological quality elements

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

Biological quality elements

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

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

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


Monitoring documents



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Supplementary Information

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