MiraBova: Understanding debris flow dynamics through geotechnical and remote sensing approaches

Debris flows are among the most hazardous natural processes in mountain regions, capable of transporting large amounts of water, soil, and rock at high speeds. They threaten lives and infrastructure, yet our ability to predict their initiation and evolution remains limited. 

The MiraBova project investigates the geomorphological characteristics of debris flow channels and the geotechnical properties of bed materials in several alpine catchments, with a particular focus on sites in the Grisons (Switzerland). Geotechnical tests include grain size distribution measurements, permeability testing, and mechanical strength measurements. Repeated drone surveys capture changes in channel topography, documenting erosion and deposition patterns after debris flow events. In addition, one channel - Val Greva in Madulain - has been equipped with a comprehensive monitoring system including cameras, geophones, and soil moisture sensors. By combining geotechnical field investigations, remote sensing, and continuous monitoring, this project provides new insights into how debris flows are triggered and how they evolve downstream. The knowledge gained will advance our understanding of debris flow dynamics and support the development of more reliable hazard assessments, early warning systems, and protection measures for alpine communities.