Erosion Quantification in Runoff Agriculture Plots by Multitemporal High-Resolution UAS Digital Photogrammetry

Abstract

In this work, we apply close-range photogrammetry with unmanned aircraft systems to quantify erosion with millimetric spatial resolution in agricultural plots. We evaluate the proposed methodology against the traditional runoff method on active plots. A database of digital elevation models was constructed with a ground sampling distance of 7 mm/pixel and maximum root-mean-square total error of 4.8 mm, which allowed the follow-up of soil erosion dynamics within the runoff plots for a period of three months. Good agreement of the photogrammetric estimations with respect to field measurements was observed, whereas it provides a more detailed spatial information that can be used for precise soil loss dynamic studies.

A Monitoring Method Integrating Terrestrial Laser Scanning and Unmanned Aerial Vehicles for Different Landslide Deformation Patterns

“…Because the scanning position can only be set up where people can physically reach, it is sometimes difficult to obtain comprehensive terrain information in the presence of visual obstacles. In contrast, airborne UAV-based landslide monitoring has a wider field of vision, and it achieves accurate data alignment mainly by deploying a large number of ground control points (GCPs) [34]. Such GCPs are usually laid out according to handheld real-time kinematics (RTK) or global positioning systems (GPS), so their number and distribution determine the quality of the UAV data.…”