Conference presentation

1. DETAILED AERIAL MAPPING AND FLOOD IMPACT
MONITORING IN THE V4 REGION
Jakub Miřijovský
Monika Šulc Michalková
Palacký University Olomouc
Department of Geoinformatics
Faculty of Science, Masaryk University, Brno, Czech Republic
Faculty of Natural Sciences, Comenius University, Bratislava, Slovakia

2. Short description
• Main aim is: Detailed aerial and terrestrial mapping and flood impact
monitoring in the Morava River region (Litovelské Pomoraví Protected area,
Osypané Břehy)
• Main target area are lowland regions and region of floodplains near active
rivers.
Visegrad konference 11. – 12. 5. 2015, Budkovice
Source: Český úřad zeměměřický a katastrální
1. Meander in the Osypané břehy locality

3. Area of interest
Source: Český úřad zeměměřický a katastrální
1. Kenický meander
2. river bank with lateral erosion
Visegrad konference 11. – 12. 5. 2015, Budkovice

4. Why?

5. Floodplain lake
• A floodplain lake is an area of fluvial hydrosystem spatial delimited by an axis
of ancient active channel.
• It is composed from two parts: humid perifluvial (aquatic perifluvial zone with
ecoton zone) and terestric zone presented by an alluvial plug (Rollet, Citterio,
Piégay, 2004).
Visegrad konference 11. – 12. 5. 2015, Budkovice

6. Floodplain lake
• Floodplain lake is most of
the year without water
Visegrad konference 11. – 12. 5. 2015, Budkovice

7. Methodology
• From methodological point of view, we use the methodology of sediment
survey established recently by Citterio & Piégay, 2008.
•Two steps are considered:
•The measurement of the sedimentation rates based on the ratio between the mean
sediment thickness and the date of the revitalisation;
•The statistical analysis of the relationships and inter-lake analysis (the characterisation of
connection frequency and to define the life expectancy of former channels).
• For a UAV and aerial imaging we use methodology established by Miřijovský,
2013
• Additional measuring
• Terrestrial photogrammetry
• Geodetic measuring of the transverse profiles
• Collaboration with Komenského University in Bratislava and Masaryk
University in Brno
Visegrad konference 11. – 12. 5. 2015, Budkovice

8. Dataset
Visegrad konference 11. – 12. 5. 2015, Budkovice

9. Dataset
Visegrad konference 11. – 12. 5. 2015, Budkovice

10. Dataset
3900 m AGL
360 m AGL
80 m AGL
Visegrad konference 11. – 12. 5. 2015, Budkovice

11. Technical equipment
• Hexacopter XL, Cessna 172
• RPAS with six propellers
• Canon EOS 500D
• 20 mm lens
• Cessna 172
• Used to spatially
extensive area
imaging.
Visegrad konference 11. – 12. 5. 2015, Budkovice

12. Technical equipment
• Camera, hydrologic and geodetic
devices
• DSLR camera with a prime
lens.
• Rain gauge
• Levelogger, Barologger
• Total station Topcon
• Levelling instrument
Visegrad konference 11. – 12. 5. 2015, Budkovice

13. Field work
• Installation of the levelogger
• Geodetic measuring – two sets
of measuring (cooperation with
students of Palacký University).
• Aerial imaging
• Four flights above the Kenický
meander
• Three flights above the meander in
Osypané břehy locality.

14. Precipitations, water level
• Speed of the lateral erosion and sediments accumulation.
Rain high water level
• Maximal erosion if there is riverbeds-forming flow

15. Precipitations, water level

16. RAW data from an aerial imaging
• Overlay 70 % – 90 %

17. Very high detail

18. GCPs

19. Methods
• Interior and Exterior orientation
• Surveying methods
• Very accurate measuring of the Ground Control
Points (GCPs), often in a difficult terrain
morphology.
Workshop RPAS (Remotely Piloted Aircraft Systems), Telč, 11. 11. 2014.

20. Methods
• Photogrammetry processing
• Structure from Motion
• Stereophotogrammetry
Visegrad konference 11. – 12. 5. 2015, Budkovice

21. Results
Visegrad konference 11. – 12. 5. 2015, Budkovice

22. Results
Visegrad konference 11. – 12. 5. 2015, Budkovice

23. Results
Max. difference: 2 m

24. Results

25. Results

26. Future work
• Continuation in terrestrial monitoring
• Hydrological data (precipitations, height of a water level, water flow).
• Aerial data (RPAS and aerial imaging).
• Terestrial measuring (transverse profiles)
• Obtaining of a new data
• Data for granulometry
Courbe granulométrique
sur la fraction
0.040 mm - 2000 mm
0
10
20
30
40
50
60
70
80
90
100
0,01 0,10 1,00 10,00 100,00 1000,00 10000,00
diamètre en microns
%
CERISIER N°1 - 24/11/05 - Monika MICHALKOVA
argile silt sable
• Modeling
• prediction of
sedimentation. It is a function
of overflowing discharge
upstream and downstream
y = 37,253e
-0,0013x
R
2
= 0,9915
0
5
10
15
20
25
30
35
0 500 1000 1500
Annual sed. rate (cm/year)
Number of days
0
20
40
60
80
100
120
2005 2010 2015 2020
Tendency 12 cm/year
Tendency 7 cm/year
Exponential mode l
Mean water level (cm)
Year

27. Jakub Miřijovský, Monika Šulc Michalková
jakub.mirijovsky@upol.cz