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Α2.1 Flood Hazard Management – Flood Mitigation and Protection

The course aims to introduce students into the basic concepts of flood hydrology and flood mitigation and protection. Initially, hydrological processes such as the rainwater runoff, loss estimation and synthetic unit hydrographs are investigated. Then, advanced probabilistic approaches are used to describe extreme hydrological events. The instantaneous unit hydrograph is also studied, and flood routing methods are applied. The contribution of GIS to flood risk prevention and management is emphasized focusing on new methodologies and techniques for flood assessment, forecasting and warning (Early Warning Systems). Flash floods as well as the flood forecasting are also being considered. The flood regime in Greece and the Directive 2007/60/EC are also presented. The traditional flood protection works are illustrated, such as diversion canals, flow regulation works and river defences. Moreover, emphasis is given on natural flood management that includes restoring natural flows, re-connection of rivers with their floodplain, restoration of wetlands, reservoirs in agricultural areas and urban Green Infrastructure.Finally, applications and case studies using integrated hydrological-hydraulic modelling with free software are presented. The structure of the course is as follows:

  1. Introduction to floods.
  2. Flood hydrology. Multi-criteria analysis for the assessment of flood prone areas. Research of hydrological processes (loss estimation, rainwater runoff and synthetic unit hydrographs). Instantaneous unit hydrograph. Flood routing.
  3. GIS applications in flood risk prevention and management.
  4. Measures and works for flood prevention. Hydrologic design. Diversion works.
  5. Flood forecasting (uncertainty, methodological approaches). Early warning systems (EWS)
  6. New methodologies and technologies for flood estimation, forecasting and warning. Flash floods.
  7. The flood regime in Greece – Directive 2007/60/EC.
  8. Flood control channels, retention basins and river regulation. Natural flood management (restoring natural flows, re-connection of rivers with their floodplain, restoration of wetlands, reservoirs in agricultural areas, urban Green Infrastructure).
  9. Applications and case studies ofintegratedhydrological-hydraulic modelling using free software.