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Europe flooding period worst in 500 years: study
By Patrick GALEY
Paris (AFP) July 22, 2020

Europe has been struck by more frequent and widespread flooding in recent decades than at any other time in the past 500 years, according to a sweeping analysis of the continent's flood history released Wednesday.

A pan-European team of researchers spent more than eight years poring over nearly 10,000 records of flood events stretching back to 1500.

They found that not only have the last 30 years witnessed more frequent and stronger flood events than at any other time, but the flooding was happening amid hotter temperatures than the historic average.

Authors of the research said it could help governments save billions on flood recovery and reconstruction.

"For flood forecasts of the next decades it is important to understand whether we are now in a completely new situation or whether this is just a repetition of something that has already occurred," said lead author Guenter Bloeschl, from the Vienna University of Technology.

"We found the former is the case, thus we need to make sure that the required safety margins are kept that may be bigger than what we thought before," he told AFP.

Global temperatures have already risen more than 1 degree Celsius since pre-industrial times, speeding up the water cycle and increasing the frequency and strength of flood events.

But extreme flooding is normally localised, making it difficult to draw conclusions as to how closely the phenomenon is influenced by rising temperatures.

The team identified nine periods across half a millenium where flooding was more common than average.

Whereas previous flood-rich periods tended to be colder than the intervening years, the most recent -- 1900-2016 -- was roughly 1.4C warmer.

The team noted in particular an increase in summer flooding during these years.

Writing in a linked comment piece, Francis Ludlow, assistant professor of medieval environmental history at Trinity College, Dublin, called the research "a major contribution to our understanding of European flood history".

Around 0.03 percent of the European population are thought to have been impacted each year by flooding between 1870-2016 -- representing an annual average cost of close to 1 percent of the continent's GDP.

"Increased flood hazards are widely expected in the future for a substantial area of Europe as a result of climate change, and so, without effective management and adaptation, these losses will potentially be even greater," said Ludlow.


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SHAKE AND BLOW
Yangtze floods force millions from their homes in central China
Jiujiang, China (AFP) July 17, 2020
Vast swathes of China have been inundated by the worst flooding in decades along the mighty Yangtze River, with residents piling into boats and makeshift rafts to escape a deluge that has collapsed flood defences and turned their homes into waterways. Heavy rains since June have left at least 141 people dead and missing, forced nearly 15 million people to be evacuated from their homes in July alone, and caused billions of dollars in economic losses, according to the government. An AFP photograp ... read more

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