This document summarizes a study on lateral erosion monitoring along the Sajó River in Hungary. The study analyzed archive aerial photographs and topographic maps from 1951 to 2011 to examine changes to the river's centerline over time. Low-cost UAV measurements were also taken between 2013-2015 using a DJI Phantom 2 drone, GoPro camera, and RTK-GPS to create high-resolution digital surface models of sample areas. The next steps will involve estimating erosion volumes by comparing the digital surface models over time.

1. LATERAL EROSION MONITORING
ALONG A SOUTHERN SECTION OF
SAJÓ (SLANÁ) RIVER
László Bertalan – Gergely Szabó PhD.
Department of Physical Geography and Geoinformatics
University of Debrecen
UAV4 Conference, Brno – Budkovice Airport - 11.05.2015.

2. Location of Sajó (Slaná) River

3. Channel morphometry
analysis
Archive military aerial
photographs
• 1951
• 1956
• 1975
• 1988
Topographic maps
• 1:10.000 (1980)
Ortophotos
• 2000
• 2005
• 2011
Spatio-temporal analysis of Sajó River

4. Changes in the centerline

5. 1 – Not regulated section; 2 – Regulated section
Natural and Anthropogenic changes
HD72/EOV

6. Low-cost UAV measurements
• DJI Phantom 2 UAV
• GoPro Hero 3+ camera
• Trimble S9
2 cm RTK-GPS for GCP
• Agisoft Photoscan
stereophotogrammetry
processing software

7. Sample areas for UAV measurements

8. Sample area 1.

11. 5,11 m
5,88 m

13. Sample area 2-3.

16. HD72/EOV

17. HD72/EOV

18. Next step: volume estimation from DSM

19. Next step: volume estimation from DSM

20. Thank you for your kind attention!