Lueger Hausgraben
Since 2016 also the Bavarian test site Lueger Hausgraben is equipped with the detection system. This small catchment, with an area of 0.2 km², ranges from around 1250 m a.s.l to 500 m a.s.l.. It endangers the state road B21 near Bad Reichenhall (Figure 1), so in 2016 two rockfall-nets has been installed inside the catchment to protect the road. This rockfall-nets has been equipped with load cells for wire rope measuring to identify the anchor forces in case of an event. The detection system is used for the triggering of the whole measurement system. The installed system consist of one Electret-microphone and two SM-6 geophones, which can be used to determine the front velocity of an event.
Fig. 1: (a) Overview of the test site Lueger Hausgraben (red line: catchment area); (b) Closer view of the monitoring Station 1 and sensor setup (Source: Google/Bing Maps).