Case study:Small water retention measures in Haluzice Gorge

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Location: 48° 49' 22.90" N, 17° 51' 56.54" E
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Project overview

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Status Complete
Project web site
Themes Environmental flows and water resources, Flood risk management, Habitat and biodiversity, Hydromorphology, Social benefits
Country Slovakia
Main contact forename Vladimir, Richard
Main contact surname Mosný, Muller
Main contact user ID
Contact organisation
Contact organisation web site http://www.gwp.org/en/GWP-CEE/
Partner organisations
Parent multi-site project
This is a parent project
encompassing the following
projects
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Project summary

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The Gorge was formed by deep erosion activity of the Haluzice Stream. In the upper part on dolomite-limestone flysch bedrock, erosion gradually excavated a 30 m deep, and a 100 m wide gorge, mostly without vegetation that gradually expanded. Due to weather conditions, fine sandy material from the steep sidewalls eroded and formed embankment cones on the foot of the gorge walls. Heavier surges of water transported material to lower parts where the debris created silt that clogged fertile land in the village Štvrtok and retroactive erosion threatened the Haluzice part of the village. On the slopes, ridges and ditches were formed that created new gorges.

The Haluzice Gorge belongs to Haluzice Village Cadastre, Nové Mesto nad Váhom District, and Trenčiansky Region in the Western Slovakia. It has a total area of 3.5 hectares. The project included comprehensive technical measures comprising stonewall weirs and stone steps. It also included non-technical measures, including horizontal barriers made of wood sill to slow water flow, and tree and shrubs planting on terraces reinforced by baskets made of willow tree to reduce soil erosion. Forest trail Haluzice Gorge was opened in 2011 with several information panels. In addition, Lesy SR incorporated Haluzice Gorge in its network of significant forest areas. These are monuments connected with the history of forestry in Slovakia in terms of natural, construction, technical and artistic values.

The technical and non-technical measures constructed in the Haluzice Gorge have multiple purposes, ranging from flood protection, water retention during dry periods, soil erosion reduction, forest ecosystem protection, protection of cultural heritage, and local pathways for education and recreation. Weirs and stone steps retain silt, caused by erosion in the upper part of the steam, as well as store high water levels during storms and slow runoff and safely drain water.

The complex stabilisation system comprised of 8 stonewall weirs, and 17 stone steps in the lower part of the Gorge. The slopes were stabilised by afforestation through terraces reinforced by willow fences. Shrubs, trees and creeper plants were planted on the floor, on the sides and on bare spots. During the following years, trees, shrubs and creepers gradually filled the whole surface of the Gorge. The last 4 m high weir was constructed towards the end in order to stop erosion and protect Haluzice Village, as well as a connecting local road with Štvrtok Village. Total length of modified Haluzický Stream included in the Gorge is 1.5 km. Currently, there are 6 functional weirs in the Gorge on the Haluzický Stream, 4 are in the right side arm. The purpose of the weirs is to retain silt, caused by erosion in the upper part of the steam, as well as retain the high water levels during storms. In addition, 17 stone steps slow runoff and safely drain water.

Monitoring surveys and results

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Lessons learnt

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Image gallery


Lower part of the Haluzice Gorge with 4 m high stone weir (Source Richard Muller, GWP Eastern Europe)
Lower part of the Haluzice Gorge with 4 m high stone weir (Source Richard Muller, GWP Eastern Europe)
Information panel of the significant forest trail (Source Richard Muller, GWP Eastern Europe)
Middle part of the Gorge with stone weir and woody sill to reduce water flow (Source Richard Muller, GWP Eastern Europe)
Middle part of the Gorge with woody sill to reduce water flow and lush vegetation (Source Richard Muller, GWP Eastern Europe)
Upper part of the gorge with two stone weirs (Source Richard Muller, GWP Eastern Europe)
Side valley of the gorge with two stone weirs (Source Richard Muller, GWP Eastern Europe)
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Catchment and subcatchment



Site

Name
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology
Reference morphology
Desired post project morphology
Heavily modified water body
National/international site designation
Local/regional site designations
Protected species present
Invasive species present
Species of interest
Dominant hydrology
Dominant substrate
River corridor land use
Average bankfull channel width category
Average bankfull channel width (m)
Average bankfull channel depth category
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 2011
Works started
Works completed
Project completed
Total cost category
Total cost (k€)
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 Flood risk management
Hydromorphology Width & depth variation, Quantity & dynamics of flow
Biology
Physico-chemical
Other reasons for the project


Measures

Structural measures
Bank/bed modifications Creation of stone steps, planting of vegetation on terraces, Weir construction
Floodplain / River corridor
Planform / Channel pattern
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
http://www.gwp.org/globalassets/global/gwp-cee files/idmp-cee/idmp-case-studies-final-pdf-small.pdf Link to a document with all the information displayed on this page

Supplementary Information

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References

Scans of documents of the Haluzice Gorge Nature Monument

http://uzemia.enviroportal.sk/main/detail/cislo/43 (Accessed on 2 August 2014)

Significant forest area Haluzice Gorge: http://www.lesy.sk/showdoc.do?docid=894 (Accessed on 5 August 2014)