- Science
- Global
Drone surveys reveal why steep alpine channels erode so fast during debris flows
- June 10, 2026 at 9:20 PM
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A brown mass—a mixture of water, boulders and fine matter—plows through the landscape. The mountains wash more than a thousand lorryloads of material into the valley on a fairly regular basis, causing damage in excess of CHF 100 million per year in Switzerland alone. A better understanding of this natural hazard requires data from the debris flow channels, of which there is very little because of the complex surveying process.
Originally published at Phys.org