Case study:Borova Stream and its Revitalisation

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Location: 48° 52' 34.54" N, 14° 13' 8.14" E

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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

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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.

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post restoration

Catchment and subcatchment Select a catchment/subcatchment Site Edit 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 Edit project background Reach length directly affected (m) 3307,0003,307,000 m <br />3,307 km <br />330,700,000 cm <br /> Project started 1994/01/02 Works started Works completed Project completed 2001/01/01 Total cost category 1000 - 5000 k€ Total cost (k€) 2954.0162,954.016 k€ <br />2,954,016 € <br /> 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 Edit reasons for restoration Mitigation of a pressure Land drainage Hydromorphology Biology Invertebrates, Macrophytes Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Floodplain / River corridor Riparian tree planting Planform / Channel pattern Creation of new meandering channel 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 summary of the restoration Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information 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.