MONITORING OF CHUTE CUTOFF IN MEANDER BEND

(ONDAVA RIVER, STROPKOV)

Ján Sládek, Miloš Rusnák

STUDY AREA

METHODS HiSystems GmbH – Mikrokopter hexa (hexakopter)

ERT – ARES

Avulsion channel

1949 1961 1972 1981

1987

2002

Avulsion channel

width: 150 m; length: 450 m created by meander chute cut off 3 floods events in 2010

Q 254 m3.s-1 (17.05.), Q 220 m3.s-1 (04.06.) and Q 150 m3.s-1 (29.07.) with recurrence interval 1 – 5 years

Avulsion channel

Geodetic survey 2012 > 700 points

UAV photogrammetry june_2012

april_2014

july_2014

UAV photogrammetry

UAV photogrammetry: processing

UAV photogrammetry: results

UAV photogrammetry: results

• low altitude of fly (to 70 m) • high resolution photo

UAV photogrammetry: results

UAV photogrammetry: results

UAV photogrammetry: results

Period Volume of eroded material

june 2012 – april 2014 1236 m3

april 2014 – july 2014 1064 m3

Total (june 2012 – july 2014) 2300 m3

Sediment analysis

Geophysics

Thank you for

your attention