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Performance of soil bioengineering constructions for slope stabilization in torrent catchment areas

Project Leader
Florineth Florin, Project Leader
Duration:
01.03.2001-30.06.2004
Type of Research
Applied Research

Further information: http://www.boku.ac.at/iblb/frame.html

Staff
Stangl Rosemarie, Project Staff
Janu Stefan, Project Staff
BOKU Research Units
Institute of Soil Bioengineering and Landscape Construction
Funded by
Federal Ministry of Agriculture, Forestry, Environment and Water Management , Stubenring 1, A-1012 Wien, Austria
Abstract
Different types of successfully applied bio-technical slope constructions are being investigated at the Department of Soil Bioengineering and Landscape Construction (University of Natural Resources and Applied Life Sciences, Austria) in order to assess long-term performance of bio-technical stabilization methods in torrent catchment areas. Insight into future protection potential and reliability is expected and will be the basis for the development of maintenance and care programs.
The studies concentrate on the composition and condition of the stands, on the development of the root systems, on geological and soil parameters and on the condition of the auxiliary material (timber, jute mesh and other fibres).
First steps in detailed investigations were done with hedge brush layers constructed in the early 1950s in the catchment areas of the torrents Geroldsbach and Enterbach in the Tyrolean Central Alps. By means of outstanding torrent control conception, the problematic catchment areas were successfully stabilized. The risk of erosion could be reduced considerably. At the present moment, the soil bioengineering constructions are still stable at both sites but the stands dominated by Alnus sp. are of advanced age, the risk of breaking down is increasing. The potential of natural succession and self-regeneration is rather low. Risk of slope instability remains due to geological site conditions.
Keywords
pedology; erosion (erosion control); forestry;
slope stabilization; hedge brush layers; soil-bioengineering; grade of succession;
Publications

Stangl, R., Gallmetzer W. (2004): Zustandsanalyse ingenieurbiologischer Maßnahmen an Hängen von Wildbacheinzugsgebieten in Nord- und Südtirol.

Ingenieurbiologie. Mitteilungsblatt, 2/04, 73-79; ISSN 1422-0008

Stangl, R., Florineth, F. (2003): Wirksamkeit ingenieurbiologischer Maßnahmen zur Sicherung von erosions- und rutschgefährdeten Hängen in Wildbacheinzugsgebieten: Teil A – Heckenbuschlagen zur Blaikensicherung an Enter- und Geroldsbach; Teil B - Erlenforst in der Stambachmure – 20 Jahre nach der Rutschung.

Endbericht im Auftrag des Bundesministeriums für Land- und Forstwirtschaft, Umwelt- und Wasserwirtschaft, Abt. IV/5, 319 Seiten. Eigenverlag des Institutes für Ingenieurbiologie und Landschaftsbau, Universität für Bodenkultur Wien, Austria

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