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	No

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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.

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Image gallery

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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)

Catchment and subcatchment Select a catchment/subcatchment Site Edit 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 Edit 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 Edit reasons for 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 Edit 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 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 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 Edit Supplementary Information 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)