UAV-Based Optical Granulometry as Tool for Detecting Changes in Structure of Flood Depositions

Abstract

This paper presents a new non-invasive technique of granulometric analysis based on the fusion of two imaging techniques, Unmanned Aerial Vehicles (UAV)-based photogrammetry and optical digital granulometry. This newly proposed technique produces seamless coverage of a study site in order to analyze the granulometric properties of alluvium and observe its spatiotemporal changes.

This proposed technique is tested by observing changes along the point bar of a mid-latitude mountain stream.

Keywords

• granulometry
• UAV
• photogrammetry
• fluvial geomorphology
• alluvial sediment
• image processing