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I. Balin, I. Nichersu, M. Memier , R. Stiuca, E. Marin , L. Galisson, N. Libralesso, M. Mierla, A. Covasnianu, M.M. Cazacu, D. Constantin, D Balin,…………………..
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Global Risk Forum – IDRC - DAVOS 2008
LIDAR Based High Resolution Numerical Terrain Model Basic Tool for Major Flood Risk Assessment
Romanian Danube PlainPUBLIC
INCDDD
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• Floods Spring 2006 - extreme event? • Humans and $$$ dimensions • MMDD (RO) - new defense dams&lines
PROBLEM ???
SOLUTION !!!
• RE consideration of Danube Flood Plain– Risk Management and Assessment
• DTM – Digital Terrain Modeling– LIDAR airborne technique
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Environmental Ministry and Sustainable development Environmental Ministry and Sustainable development of Romanian government :research study :of Romanian government :research study :
23.11.2006 for 15.12.200723.11.2006 for 15.12.2007
Danube Delta National Institute of Research and Danube Delta National Institute of Research and Development Development TulceaTulcea –– RomaniaRomania
Collaborators:Collaborators:INHGA INHGA –– Bucharest (RO)Bucharest (RO)ISPIF ISPIF –– Bucharest (RO)Bucharest (RO)
EnviroScopYEnviroScopY SRL (ESYSRL (ESY-- RO)RO)EnviroScopYEnviroScopY SA ( ESYSA ( ESY-- CH)CH)
--SINTEGRA ( FR) SINTEGRA ( FR) CoCo--Sponsor CommunicationsSponsor Communications : Vodafone S.A.: Vodafone S.A.
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PRIVATE
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GPS corrections in
real time from the
satellites
Laser scanning
GPS double frequency
reference station
GPS double frequency
Inertial device
REAL TIME
GPS BASED
Navigation System
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REELD (Economical and Ecological Reconstruction of the Danube Flood Plain )
EMERGENCY of Field Campaign
• Surface Requested: 7000.000 ha• Surface Wide is variable: 1 to 80 km• Length 1075 km (Danube in Romania)
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The principle of LIDAR technique
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AirborneLIDAR
PartenAvia (APEI SA)
DTM-LIDAR flight parameters ValueFlight alltitude 450 mSpeed flight 45 m/sBand width 520 mLateral coverage bands/Overlapping 20%Distance between bands 415 mLaser emmision frequency 65 kHzScanning angle 600 (+/- 100)Scanning frequency 75 Hz(Standard deviation) total planimetric precision of the measured laser points
20 cm
Medium density of laser points 3-5 pts / m2
Medium distance between laser points (flight direction and perpendicular)
0,6 m
4-5 pts/m2
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Flight tracks along the Danube river-Romanian section of the river
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Digital Terrain Model (DTM) GROUND (no vegetation)
Buildings
Danube
planted forest
Defense Dam
Trees
TULC
EAA
REA
GALATI SHIPYARD
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TOPOGRAPHICAL PROFILES-SAMPLES-
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Profile Channel (longitudinal)
QUANTITATIVE DATA
Profile - Channel (transversal)
Profile Danube (transversal)
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Bands from LIDAR: length of 15 km and width of 500 meters each
The intensity of LIDAR signal’s echo („albedo”). Danube - black color in the left, that means lack of LIDAR signal.
Altitude- Danube in black color, the higher areas – green to red.
Altitude class i.e. low vegetation
Ground DTM: see clearly the Danube, the hills
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3D Area : Mehedinti Sample
View of the Western section of Danube Plain : “Portile de Fier” to Maglavid
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FLOOD HYDROLOGIC SIMULATION
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Conclusion (s)Done 650.000 ha
• Delta Z = 5 cm• Delta X/Y = 3-5 points/m2• 1 point for each inhabitant of the EARTH !
To be done: (1) Absolute Z – RO calibration STEREO 70 ?!(2) Danube Delta extension !!!
Contact EnviroScopY SA [email protected]
Phone +41 21 693 9000