Acqua Alta: Flooding and Flood Forecasting in Venice, Italy

Acqua Alta: Flooding and Flood Forecasting in Venice, Italy

Contributed by Luigi Cavaleri, Institute of Marine Science (CNR), Venice, Italy. Venice is sinking at a rate of 1-2 mm/y. Combined with the present rate of sea level rise, ~3mm/y, this leads to ever more critical conditions for the possibility of flooding. With half of the city now no more than 80 cm above the present mean sea level and a tidal spring excursion of about 1 metre, any small surge will imply flooding in large parts of the city. A…

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Fictitious Forcings have Macondo in Trouble: A Hackathon Story

Fictitious Forcings have Macondo in Trouble: A Hackathon Story

Contributed by Georgy Ayzel.  Meteorological ensemble forecasts form the core of every system for hydrological ensemble prediction. There are multiple data sources where our meteorological ensembles could come from: historical observations, numerical weather prediction and climate models, or stochastic weather generators. Different sources serve different ways we want to communicate and deliver the information of possible runoff responses to various meteorological conditions. However, there is a source that is typically ignored in the modern landscape of ensemble runoff prediction –…

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We need better topography data for better flood inundation simulation

We need better topography data for better flood inundation simulation

Contributed by Dai Yamazaki. In recent years, technical barriers for executing flood inundation simulation are getting lower and lower, thanks to increasing computational power and increasing availability of satellite observation data. Flood inundation models are now being used for flood risk assessment and monitoring, such as making a flood hazard map at any location in the world and forecasting flood hazard in a real-time manner. The physics equations used in flood inundation models are relatively simple, compared to those of…

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Hydrological forecasting at EGU 2018 – what not to miss next week!

Hydrological forecasting at EGU 2018 – what not to miss next week!

The EGU 2018 Annual General Assembly will take place next week, from 8–13 April 2017 in Vienna as usual. The HEPEX community will be represented in many ways, and below you will find a quick guide to the most relevant sessions for hydrometeorological forecasters throughout the week. The sub-session on hydrological forecasting consists of 5 oral and poster sessions and 1 pico session. Get the EGU app now and tag the sessions! The very first day will kick off with…

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Understanding public responses to flood warnings

Understanding public responses to flood warnings

Contributed by Michael Cranston, RAB Consultants, Scotland The Winter 2015 floods in the United Kingdom and Ireland led to severe and widespread flooding for many communities.  The introduction of storm naming by the Met Office and Met Eireann the same year has since led to the names of Desmond, Frank and Eva becoming synonymous with the flooding that was experienced during that winter. Storm Desmond (5 December) brought major flooding to Cumbria and southern Scotland with a new 24-hour UK…

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