LEARNING OUTCOMES

The aim of the course is to introduce the student to the basic concepts and techniques for flood hazard mapping. These include: - the basics of flood hazard mapping: common terminology, indicators of hazard magnitude, basics of mapping techniques - elements of the statistical analysis of the hydrological extremes (river discharge and rainfall). Source of data and common statistical techniques to derive rainfall and river flow quantiles - elements of hydrological models: common simple rainfall-runoff and flow routing models. - flood hazard mapping: empirical, physically based and geomorphological models At the end of the course the student is expected to be able to - understand the meaning of flood hazard magnitude and interpret flood hazard maps - retrieve and manipulate series of hydrological extremes and apply basic statistics deriving rainfall and flood quantiles - apply simple hydrological modelling to the result of the statistical analysis of extremes - draw a flood hazard map for a small river basin using geomorphological methods

AIMS AND LEARNING OUTCOMES

The course addresses the problem of flood hazard mapping, as one of the stepr of flood risk assessment, by identifying the specific problems linked to the different sizes of watersheds and proposing different methods of solution, in function of the objective of the risk assessment (local scale assessment, country risk profiles, etc ..). In particular, both empirical and physically based methods for flood hazard mapping will be analysed.

The course intends to provide the student with the knowledge needed to interpret flood hazard maps with a view to a subsequent risk assessment, and provide the ability to map the same hazard with simplified methodologies. At the end of the course the student is expected to be able to face the problem of flood hazard mapping at various spatial scales, from the point of view of the end user and of the “producer”  and link it to  the assessment of the flood risk in support to the phases of the risk management cycle.

In detail the student is expected to be able to:

- understand the meaning of flood hazard magnitude and interpret flood hazard maps

- know the different flood mapping techniques

- retrieve and manipulate series of hydrological extremes and apply basic statistics deriving rainfall and flood quantiles

- apply simple hydrological modelling to the result of the statistical analysis of extremes

- draw a flood hazard map for a small river basin using geomorphological methods

TEACHING METHODS

- front lessons

- practical exercises in classroom to be completed as homework assignment

SYLLABUS/CONTENT

The topics covered by the course are so subdivided

Introduction: definition of meteo-hydrology, meteo-hydrological hazards and other hazards, methods of representation of flood hazard

Hydrological data analysis: Methods of analysis of hydrological observations for modeling of extremes, common databases for hydrological observations.

Principles of hydrology and hydraulics of extremes:  principles of hydrological modelling for flood hazard mapping and flood forecast

Flood hazard mapping: empirical and phydically based flood hazard mapping moethods

Each section foresees the assignment of an exercise on a specific case study which must be presented for the exam.

RECOMMENDED READING/BIBLIOGRAPHY

Annual disasters statistical review (last):

 https://www.cred.be/annual-disaster-statistical-review-2017

Databases of meteo-hydrological observations:

•Global Runoff Data Centre(discharge) http://www.bafg.de/GRDC/EN/Home/homepage_node.html

•NCDC Climate data online:  https://www.ncdc.noaa.gov/cdo-web/datasets

•IMERG/GPM - TRMM  data (rainfall from satellite): https://pmm.nasa.gov/data-access/downloads/

•GEO-GEOSS portal: http://www.geoportal.org/

Global assessment report 2017

https://www.preventionweb.net/files/53086_garatlaslr2.pdf

QGis Tutorials:

https://www.qgistutorials.com/en/