Home About HyMeX
Motivations
Science questions
Observation strategy
Modelling strategy
Target areas
Key documents
Organisation
International coordination
Working groups
Task teams
National contributions
Endorsements
Resources
Database
Data policy
Publications
Education and summer schools
Drifting balloons (BAMED)
SOP web page
Google maps data visualisation
Workshops Projects
ASICS-MED
MOBICLIMEX
MUSIC
IODA-MED
REMEMBER
FLOODSCALE
EXAEDRE
Offers Links Contacts
Science & Task teams
Science teams
Task teams
Implementation plan
Coordination
International Scientific Steering Committee (ISSC)
Executive Committee for Implementation and Science Coordination (EC-ISC)
Executive Committee - France (EC-Fr)
HyMeX France
HyMeX Italy
HyMeX Spain
Archive

3rd HyMeX workshop 1-4 June 2009 Heraklion (Gournes), Crete-Greece

Hydrologic analysis of flash floods in a mountainous basin


Efthymios Nikolopoulos (Hellenic Center for Marine Research, Institute of Inland Waters); E.N. Anagnostou, M. Borga, E.R. Vivoni, A. Papadopoulos

Flash floods keep a high ranking in nature's most catastrophic phenomena. Better understanding of the generation mechanisms of flash floods is essential to improve our prediction ability and develope more accurate warning systems. This study focuses on the hydrologic analysis of two major flash floods recorded in a small scale mountainous basin (Posina) in Northeastern Italy, during August 1999 and October 1992. A physically-based distributed hydrologic model is used to investigate the dominant mechanisms for runoff generation. Simulation results are used to evaluate the dynamic characteristics of the hydrologic processes associated with the flash flood events. The sensitivity of flash flood generation to i) initial soil moisture conditions and ii) land use/cover change is examined through simulations for different scenarios of initial soil moisture and vegetation patterns. Similarities and differences are discussed for the different investigating scenarios and possible links with the state of initial conditions and rainfall forcing structure is investigated.