Stumvoll 20190308 HfM MitUebersichtsdaten

The "Hofermühle" location is in the hydrological catchment area of ​​the Redtenbach in Konradsheim, town and district of Waidhofen an der Ybbs, Province of Lower Austria. Similar to the location of the Salcher landslide in Gresten, the Hofermühle is located in a complex geological transition zone between the Limestone Alps (Oberostalpin) in the south, Flysch Zone (Penninikum) and Helvetikum in the north (see, among others, Ruttner & Schnabel 1988, Schnabel 1980 or Schnabel 1999). Due to the high proportion of clayey-marl-like material and its high degree of weathering, the flysch zone has the highest density of sliding processes in Lower Austria (Schwenk 1992, Schweigl & Hervas 2009, Petschko et al. 2014).

 

Figure 5: a) Location of the NoeSLIDE site in Hofermühle in Austria; b) Location of the hydrological catchment area of ​​the Hofermühlbach in the Redtenbach catchment area; c) hydrological catchment area of ​​the Hofermühlbach. (DEM (10 m): BMDW 2017 (www.data.gv.at), geological map 1: 500 000 according to Weber (1997), DEM (1 m) 2009 and orthophoto 2011: provided by the state of Lower Austria). Graphics: Stumvoll M.J. 2020.

The processes at the site are complex; Areas with very slow and shallow rotational and translational slides are connected to a torrent system, which can also lead to faster processes such as debris flow. The first landslide activities were documented on the orographic right at the end of the 1970s, drainage and afforestation were the consequence. In 2011 there were sliding processes on the orographic left side and in 2013 finally a coupled debris flow process along the Hofermühlbaches (Sausgruber 2013). In a report by the WLV from 2016, the area affected by landslide processes is estimated at around 50,000 m² (Sausgruber 2016). In order to anticipate the danger for the adjacent homestead caused by reactivating the Mur Canal, the WLV 2018/2019 built a diversion dam at the exit of the Hofermühlbach. In addition, the active landslide area in the upper catchment area was roughly drained using superficial ditches (December 2019).

The Hofermühle site has been part of the NoeSLIDE monitoring project since 2014 and is being investigated using a variety of different methods and techniques. Details can be found in the two sub-tabs on subsurface and surface monitoring.

 

Literature:

  • Ruttner, A. & W. Schnabel. 1988. Geologische Karte der Republik Österreich 1:50.000 Blatt 71 Ybbsitz. Wien: Geologische Bundesanstalt.
  • Sausgruber, T. 2013. Hofermühlrutschung Waidhofen/ Ybbs (intern). Mit zwei Anhängen (Kartierung). 12. Innsbruck, Austria: Forsttechnischer Dienst für Wildbach und Lawinenverbauung. Geologische Stelle. Innsbruck, Austria.
  • Sausgruber, T. 2016. Protokoll zum Lokalaugenschein Hangprozess Hofermühle / Hofermühlrutschung. Mit einem Anhang (Kartierung). 4. Innsbruck, Austria: Forsttechnischer Dienst für Wildbach und Lawinenverbauung. Geologische Stelle. Innsbruck, Austria
  • Schnabel, W. 1980. Die Geologie des Voralpengebietes im Abschnitt Waidhofen an der Ybbs - Ybbsitz - Gresten. In Waidhofner Heimatblätter, 13-27. Waidhofen, Ybbs: Musealverein Waidhofen an der Ybbs.
  • Schnabel, W. 1999. The Flysch Zone of the Eastern Alps. In FOREGS '99 <Vienna>, Field trip guide Vienna - Dachstein - Hallstatt - Salzkammergut (UNESCO World Heritage Area), August 30th - September 2nd, 1999: 150 Years Geological Survey of Austria, ed. G. W. Mandl, 27-35. Wien: Verlag der Geologischen Bundesanstalt (GBA).
  • Schweigl, J. & J. Hervás. 2009. Landslide Mapping in Austria. In Scientific and Technical Research series, 61. Joint Research Centre – Institute for Environment and Sustainability 
  • Schwenk, H. (1992) Massenbewegungen in Niederösterreich 1953 - 1990. Jahrbuch der Geologischen Bundesanstalt, 135, 597-660.
  • Stumvoll, M. J. & T. Glade. 2019. MillSLIDE - Monitoring der Hofermühle.- Interner Projektbericht für die Wildbach- und Lawinenverbauung, Forsttechnischer Dienst Niederösterreich West. 32. Wien: Universität Wien, Institut für Geographie und Regionalforschung.