Péter Bakonyi VITUKI
Outline EU vs. Hungarian requirements Hungarian approach Preliminary flood hazard maps Flood hazard mapping Large rivers Small rivers Excess water What s next? 16-11-2009 Meeting of flood protection experts of V 4 countries 2
EU vs. Hungarian requirements EU requirements Preliminary flood risk assessment Flood hazard maps Flood risk maps Flood risk management plans Hungarian requirements Preliminary flood risk assessment Flood hazard maps Flood risk maps Proper risk analysis Flood risk management plans 16-11-2009 Meeting of flood protection experts of V 4 countries 3
EU vs. Hungarian requirements EU requirements Flood extent Water depth or level Flow velocity Indicative No of inhabitants Economic activity affected Any other information Hungarian requirements Flood extent Water depth or level Flow velocity Duration Territorial distribution of inhabitants Territorial distribution of economic activity affected Any other information 16-11-2009 Meeting of flood protection experts of V 4 countries 4
EU vs. Hungarian requirements EU requirements Preliminary flood risk assessment Flood hazard maps Flood risk maps Flood risk management plans Hungarian requirements Preliminary flood risk assessment Flood hazard maps Flood risk maps Proper risk analysis Flood risk management plans 16-11-2009 Meeting of flood protection experts of V 4 countries 5
Large river Small rivers Excess water Dykes Breaches Inundation No dykes No breaches Inundation Precipitation Not drained or Inproperly drained 16-11-2009 Meeting of flood protection experts of V 4 countries 6
16-11-2009 Meeting of flood protection experts of V 4 countries 7
Q(t) Statistical analysis Q(t) Rainfall-runoff models Precipitation generator Breach Inundation 16-11-2009 Meeting of flood protection experts of V 4 countries 8
16-11-2009 Meeting of flood protection experts of V 4 countries 9
16-11-2009 Meeting of flood protection experts of V 4 countries 10
16-11-2009 Meeting of flood protection experts of V 4 countries 11
Két eltérı csapadékmezı hatására kialakuló hidrológiai helyzet a Sajó-Hernád és a Bodrog vízgyőjtıjén 2008.12.02. Árvízi veszélytérképek készítésének módszertana 12
2008.12.02. Árvízi veszélytérképek készítésének módszertana 13
Flood hazard mapping large rivers Flood wave transformation Simple DLCM 1D hydrodynamic model (HEC-RAS) 16-11-2009 Meeting of flood protection experts of V 4 countries 14
Flood hazard mapping large rivers Flood wave transformation 2D hydrodynamic model (BUT) 16-11-2009 Meeting of flood protection experts of V 4 countries 15
Flood hazard T flood [h] h max [m] v max [m/s] low 8 < T h < 1 v <0.5 medium 1 < T < 8 1 < h < 3 0.5 < v < 1 high T < 1 3 < h 1 < v Flood arrival time
Flood hazard T flood [h] h max [m] v max [m/s] low 8 < T h < 1 v <0.5 medium 1 < T < 8 1 < h < 3 0.5 < v < 1 high T < 1 3 < h 1 < v Flood depth
Flood hazard T flood [h] h max [m] v max [m/s] low 8 < T h < 1 v <0.5 medium 1 < T < 8 1 < h < 3 0.5 < v < 1 high T < 1 3 < h 1 < v Flow velocity
Flood hazard T flood [h] h max [m] v max [m/s] low 8 < T h < 1 v <0.5 medium 1 < T < 8 1 < h < 3 0.5 < v < 1 high T < 1 3 < h 1 < v Based on the highest local source of hazard
Q(t) Statistical analysis Q(t) Rainfall-runoff models Precipitation generator 16-11-2009 Meeting of flood protection experts of V 4 countries 20
Flood hazard mapping small rivers Simplified method Statistical analysis of measures runoff Regional coefficient of maximum runoff (Kóris method) Chézy or Bernoulli Detailed analysis Passive factors (relief and land cover) Rainfall-runoff 1D modelling (HEC-RAS) 16-11-2009 Meeting of flood protection experts of V 4 countries 21
Flood hazard mapping small rivers - detailed analysis Databases and programs needed 10*10m DTM 1*1m DTM along streams CORINE land cover Soil map ArcGIS/ArcView 9.1 or newer HEC-GeoRAS HEC-GeoHMS 16-11-2009 Meeting of flood protection experts of V 4 countries 22
Flood hazard mapping excess waters Goals Territorial delineation of inundated area (w. probability) Analysis of the efficiency of excess water management options Analysis of the efficiency of operation and development of structures Future effects (climate change) 16-11-2009 Meeting of flood protection experts of V 4 countries 25
Flood hazard mapping excess waters Sources Precipitation (duration, intensity, return period) High groundwater level, frost, impermeable soil Floods in rivers (duration) Reliefs Land cover Meteorology Maintenance of drainage structures 16-11-2009 Meeting of flood protection experts of V 4 countries 26
Flood hazard mapping excess waters Pathways Runoff Infiltration Evapotranspiration Groundwater flow Structures 16-11-2009 Meeting of flood protection experts of V 4 countries 27
Excess water extent after a 4 days (30mm/d) snowmelt 4napos (30mm/d) hóolvadás utáni belvízi helyzet
Zsilip,max. 5m3/s 2 m3/s Karcsa felé 2. Zsilip,max. 2m3/s 1 Tájhasználathoz kapcsolódó osztótöltés vápa 5 m3/s vízpótlás Tiszából Bodrogköz, Cigánd -Reservoir
Phases of drainage (t=0 day; V=15.37 million m 3 )
Phases of drainage (t=0.44 days; V=15.37 million m 3 )
Phases of drainage (t=4.14 days; V=15.27 million m 3 )
Phases of drainage (t=5.99 days; V=15.15 million m 3 )
Phases of drainage (t=13.21 days; V=14.99 million m 3 )
What s next? Development of methodologies Description of methodologies 3*3 pilot areas Transfer of methodologies to the Regional Environmental and Water Management Directorates 16-11-2009 Meeting of flood protection experts of V 4 countries 35
16-11-2009 Meeting of flood protection experts of V 4 countries 36