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  US flood protection cards are based on outdated patterns | Bit Updates
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US flood protection cards are based on outdated patterns

Monday, September 11th, 2017 | bitcoin updates

      
    
  US flood protection cards are based on obsolete patterns

      

    

    
    
      
          11.09.2017 07:34 UhrSascha Mattke
          
      
      
      
      
    

    
        
            
        
        
    
    
    
              When planning cities and facilities for flood protection, weather data from the past are used. But because of climate change, forecasts based on this are less and less realistic.
            
            
            
                    
            In recent Hurricane Harvey, two-thirds of the floods in the Houston area have occurred outside of areas where the 100-year FEMA maps have led to floods every 100 years. More than 50 percent were even outside each mapped flood zone, which meant that these areas had only a "minimal" risk of flooding. The findings of researchers at the University of California in Davis, reported Technology Review online in "Obsolete Risks".

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The key problem with maps with high water zones is that they are based on historical patterns that are increasingly deviating from reality due to changing climate conditions. This in turn means that planning rules, building codes, insurance and construction patterns can be dangerously obsolete on this basis. In many cases, cities and dams are built in the USA according to the conditions of the past, instead of orienting themselves to the present or even the future. For citizens, this means dangers to society for higher costs for disaster relief and reconstruction after events like Harvey.
This year, Kerry Emanuel, a hurricane researcher and professor of atmospheric research at MIT, used climate models from various institutes to simulate future storms. In general, the number of storms, which are becoming much more intense shortly before reaching the coast, is expected to grow sharply by the year 2100. The general direction is thus clear. However, according to Emanuel, it is difficult to predict precisely the development of individual storms. This would require further improvements in the forecasting methods.
Read more at Technology Review online:
(SMA)

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