Case study:Borova Stream and its Revitalisation

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Location: 48° 52' 35", 14° 13' 8"
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Project overview

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Status Complete
Project web site
Themes Flood risk management, Habitat and biodiversity
Country Czech Republic
Main contact forename Jan
Main contact surname Flasar
Main contact user ID
Contact organisation Blansky Les PLA Authority
Contact organisation web site http://www.ochranaprirody.cz
Partner organisations
Parent multi-site project
This is a parent project
encompassing the following
projects
No
Project picture

Project summary

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In the 1970s and mainly 1980s, the large scale regulation of water regime in the landscape was carried out over the whole country (at that time it was Czechoslovakia). The purpose was to increase self-sufficiency in agricultural production, which was desired by the communistic government. As a part of this effort (in many cases not cost beneficial), the water regime of Borova brook and its catchment area were also regulated.

In a large-scale drainage project (done in 1982-1984), the orginal meandering stream of the Borova brook was straightened and reduced. The stream bed was over deepened to a depth of 1.2-1.8m and stregthened by concrete blocks. At the same time, argricultural land in the catchment area (17.8 km2)of the brook was drained. The result of the intervention was a serious disturbance of the water regime in the whole catchment area and led to the degradation and decline of natural and semi-natural communities

The restration was undertaken in two phases. During the restoratio the length of the stream increased by 6.3 km. A shallow meandering streambed, where sections of speedily running water alternated with sections of a slow stream were created. The project was fully funded from the program for revitalization of river systems by the minitry of Environment.

Monitoring surveys and results

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Invertebrate within the wet habitats of the brook valley responded positively to the restoration. There was an increase in diversity following the works.

The stream provided flood storage during the 2001 flooding.

Lessons learnt

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Image gallery


post restoration


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Catchment and subcatchment



Site

Name Borova Stream western Blansky forest
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology Over deepened
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 Plantation forestry, Improved/semi-improved grassland/pasture
Average bankfull channel width category
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

Reach length directly affected (m) 3307,000
3,307,000 m
3,307 km
330,700,000 cm
Project started 1994/01/02
Works started
Works completed
Project completed 2001/01/01
Total cost category 1000 - 5000 k€
Total cost (k€) 2954.016
2,954.016 k€
2,954,016 €
Benefit to cost ratio
Funding 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

Mitigation of a pressure Land drainage
Hydromorphology
Biology Invertebrates, Macrophytes
Physico-chemical
Other reasons for the project


Measures

Structural measures
Bank/bed modifications
Floodplain / River corridor Riparian planting
Planform / Channel pattern Meandering channel
Other
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



Additional documents and videos


Additional links and references

Link Description

Supplementary Information

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Maradova M. (2004) Effect of streambed retsortaion on macroinvertebrates biodiversity: the case of Borova brook (landscape Potected Area Blansky les, Czech Republic). Master thesis, Faculty of Biological Sciences, University of South Bohemia.