Fig. 1
From: Debris-flow monitoring on volcanoes via a novel usage of a laser rangefinder
Deployment at the USGS debris-flow flume in May 2023. a Photo of the laser rangefinder fixed to the pole on a nearby platform pointing at the channel with sketch and conversion from change in distance (Δd) to change in height (Δh) overlain. b Photo of the laser rangefinder. c Distance recorded by the laser rangefinder, and d converted change in height showing the flow front arrival at the sensor and subsequent deposition of material