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Flood Risk Management

Course Description:

The course consists of 5 parts. In the first part, the student is introduced to the flood types, their natural and potential context, flood-vulnerable areas, constructive and non-constructive flood management measures and Flood Early Warning Systems (FEWS). The second part of the course describes in detail the issue of flood risk assessment with the analysis of Directive 2007/60 / EC on the preliminary assessment and management of flood risk and the preparation of flood hazard and flood risk maps. The third part presents the FEWS and their importance in flood risk management. The fourth and fifth parts present the hydrological and hydraulic, respectively, (integrated) mathematical simulation of floods by identifying flood vulnerable areas and preparing flood risk maps, using a series of software, such as HEC-HMS, HER-RAS and TELEMAC.

Prerequisite Knowledge

Hydrology, Hydraulics

Course Units

# Title Description Hours
1 Introduction to floods Flood types, natural context, potential context, flood vulnerable areas, constructive and non-constructive flood management measures, flash floods, Flood Early Warning Systems (FEWS). 4
2 Flood risk assessment Directive 2007/60 / EC on the assessment and management of flood risk. Preliminary flood risk assessment. Preparation of flood hazard and flood risk maps. Flood risk management plans. Flood management measures: prevention, protection and mitigation. Preliminary assessment of flood vulnerable areas through GIS-based multi-criteria analysis method. 8
3 Flood early warning systems New technologies in precipitation assessment for flood risk management. 4
4 Flood hydrology Maximum rainfall distributions. Rainfall curves. Development of design hyetograph. Loss estimation. Rainwater runoff. Synthetic unit hydrograph. Design flood hydrograph. Flood routing. The HEC-HMS software. 8
5 Flood hydraulics Ι Rapidly-varied flow equations and their solution by finite difference method. 12
6 Flood hydraulics ΙΙ Hydraulic Modeling and Flood Inundation Mapping using HEC-RAS and TELEMAC software and preparation of flood risk maps. 16

Learning Objectives

By the completion of the course, the students will be able to:

  • Know the flood types, their natural and potential context, constructive and non-constructive flood management measures, flash floods and FEWS;
  • Know Directive 2007/60 / EC on the flood risk assessment and management and related management plans;
  • Understand the basic concepts of a FEWS and describe its components and its importance in flood risk management;
  • Know how the mathematical description of the hydrological behavior of a flood and its routing;
  • Know the Rapidly-varied flow equations, solve them by Inite difference method and applies them to the mathematical description of the hydraulic behavior of a flood;
  • Assess flood risk, prepare flood hazard and flood risk maps and identify flood vulnerable areas using GIS-based multi-criteria analysis method;
  • Know the basic features of HEC-HMS, HER-RAS and TELEMAC software and application of them to perform integrated hydrological and hydraulic mathematical flood simulation to identify flood vulnerable areas and prepare flood risk maps;
  • Collaborate with his fellow students to solve practical flood calculation problems to write part of their relevant Technical Reports following recommended writing specifications and to present them together with his fellow students in public.

Teaching Methods

Teaching methods Lectures combining active learning with project-based learning and research-oriented teaching.
Teaching media Presentations on the blackboard. PowerPoint slides. PC calculations with Excel.
Computer and software use Yes
Problems - Applications Yes
Assignments (projects, reports) Elaboration of 4 projects in groups of 2-4 people and writing of the respective Technical Reports with recommended specifications (project based learning). The delivery of the Technical Reports of the subjects is obligatory. Students start the projects in the classroom, in personal computers, continue them and complete them at home. The Technical Reports are corrected by the teachers and returned.
Student presentations Presentation of the projects by the students and discussion.

Student Assessment

  • Final written exam: 50%
  • Assignments (projects, reports): 50%

Textbooks - Bibliography

  • Mimikou, M., Baltas, E. and Tsihrintzis, V. (2016). Hydrology and Water Resource Systems, CRC Press, Taylor and Francis Group.
  • Stamou, A. (2014). Rapidly varying flows in hydraulic engineering, Notes, Technical University of Munich, November.
  • Other instructor notes and PowerPoint presentations posted on mycources.
  • Related scientific journals: Journal of Flood Risk Management; https://onlinelibrary.wiley.com/journal/1753318x

Lecture Time - Place:

  • Wednesday, 10:45 – 12:30,
    Rooms:
    • Ζ. Κτ. 1 Πολ., Αιθ. 11
  • Friday, 11:45 – 13:30,
    Rooms:
    • Ζ. Κτ. 1 Πολ., Αιθ. 4