Investigations of channel evolution on River Sajó

László Bertalan PhD studentUnviversity of Debrecen (Hungary)

11.10. 2014.

Sample areas 1.

2.

3.

4.

I. Recent channel development of River Sajó

I. Recent channel development of River Sajó

Survey methods:• Total station• RTK GPS

Soil samples:• Every 10 cm from surface to groundwater level• 312 samples yet…but more coming • Grain size distribution, CaCO3

Channel evolution monitoring:• DJI Phantom 1 UAV• Ortophotos + Digital Surface Models

Sample area 1-2.

I. Recent channel development of River Sajó

I. Recent channel development of River Sajó

Sample area 1-2.

Sample area 3.

I. Recent channel development of River Sajó

I. Recent channel development of River Sajó

Sample area 3.

8,9 m

8,4 m

2,8 m

UAV - DFM

I. Recent channel development of River Sajó

UAVDFM + Ortophoto

I. Recent channel development of River Sajó

Accuracy assessment

I. Recent channel development of River Sajó

19802010

Channel morphometryanalysis

Archive military aerial photographs•1951•1956•1975•1988

Ortophotos•2000•2005•2011

II. Long term temporal analysis of River Sajó