Jean-Michel Fallot

Dr. Jean-Michel Fallot
Institut de Géographie et Durabilité (IGD)
Université de Lausanne
UNIL Mouline - Géopolis
CH-1015 Lausanne

Phone: +41 (0) 21 692 43 36
Phone2: +41 (0) 21 692 30 70
Fax: +41 (0) 21 692 35 55
E-mail: jean-michel.fallot(at)
URL Institution:

Expertise of Jean-Michel Fallot:
Expertise CategorySpecific Expertise
ScopeImpact of Change
Topic AtmosphereMeteorology
Topic HydrospherePrecipitation / Runoff
Topic CryosphereSnow Cover
Topic Risk & Disaster ManagementRisk Assessment / Forecasting
Spatial ZonesMountain / Highland
Spatial ScaleRegional
Local / Community
Time FrameRecent / Today
Statistical FocusExtreme Events
Mean Change / Trends
MethodsData Collection - Measurement
Data Analysis
PolarHigh Altitude

Specialties of Jean-Michel Fallot:
Assessment of extreme precipitation and winds in Switzerland with statistical analyses and regional modelling.

Extreme precipitation and winds were determined in Switzerland with Gumbel analyses and a three-dimensional meteorological model in order to define the ideal dimensions of protection structure against floodings and wind gusts. This study confirms that daily extreme precipitation values have increased in most locations of Switzerland in connection with the global climate warming.

Daily extreme precipitation values for a return period of 500 years were determined at 429 locations in Switzerland from Gumbel analyses carried out on rainfall time-series over the period 1961-2008. These extreme daily precipitation values are in average 14% higher than those previously calculated by the WSL (Swiss Federal Institute for Forest, Snow and Landscape Research) from rainfall time-series over the period 1901-1970. Extreme wind gusts for a return period of 50 years were also estimated at 70 locations in Switzerland from Gumbel analyses on time-series over the period 1981-2001. But extreme values can only be known at precise locations from these statistical analyses. Thus a three-dimensional meteorological model was developed for calculating extreme winds and precipitation every 2 km at the horizontal scale in Switzerland. Results of the model were compared with extreme precipitation and wind values estimated from statistical analyses carried out on time-series. This comparison shows a quite good agreement between the model and extreme values.

Last update: 11/29/19
Source of data: ProClim- Research InfoSystem (1993-2020)

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