Background
Due to various landslides in recent months, the city of Saarbrücken has recognized the need to develop a scientifically supported landslide monitoring system for at-risk locations and roads within the city limits. In this context, dimeto GmbH (Friedrichsthal) was contacted and asked to conduct a preliminary study. To this end, two or three sensors are to be installed on a selected slope in October 24. Once initial data (temperature, soil moisture, conductivity, and precipitation) have been successfully collected, a scientifically supervised project should be launched in the foreseeable future.
Initial ideas include: For the city of Saarbrücken, a critical precipitation threshold should be determined, as accurate precipitation measurements and forecasts are helpful for early warning systems. In the event of potential large landslides, measurements of pore water pressure should be taken to monitor the driving force. In addition, measurements of movement rates are also of interest. To this end, a new laser-based sensor system is to be developed in the OML laboratory at htw saar. When this is combined with measurements of pore water pressure, soil moisture, hydrology, and precipitation, as well as the geotechnical conditions, a complete picture of the situation and potential hazards emerges.
Due to climate change, landslides are already occurring more frequently and will certainly become even more common in the future—a phenomenon linked here primarily to more extreme precipitation. This poses potential risks to people, buildings, infrastructure, and transportation. The development of a landslide monitoring system with early warning capabilities, combined with innovative sensor technology, could help prevent damage in the Saarland and also generate broad interest among other at-risk regions. The sensor technology is to be integrated wirelessly and securely into existing IoT platforms via LoRaWAN.
The topic of landslides was selected for a major collaborative project within KoK2. In addition to developing and testing sensor technology for landslide monitoring, the goal is to integrate and combine this technology with mapping of past landslides and at-risk slopes, as well as to perform geophysical modeling of the processes occurring in the sliding ground.
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