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IELTS Bar Chart: Average Number of Coastal Flood Events per Year

by Debbie Mayowa
(Qatar)

Source: EPA's Climate Change Indicators in the United States: www.epa.gov/climate-indicators

Source: EPA's Climate Change Indicators in the United States: www.epa.gov/climate-indicators

The chart below shows the number of flood events in four different cities in the United States during four different periods.

The bar graph depicts the mean of annual flood events which occurred at four city coastlines based in the United States at four time periods.

Between 1950 and 1969, all cities except San Francisco experienced an average of at least one flood events at their coast every year. Moreover, three out of four US cities have similar averages.
However, the averaged number of flood events per annual doubled in both Atlantic City and Washington by the second time period, 1970-1989.

From 1990 to 2009, Atlantic City had the highest mean of coastline flood events, averaging around 5 flood events each year, which was at least 2.5 times greater than that of Washington.

By the last time period, between 2010 and 2020, all cities, excluding San Francisco, were illustrated to have the greatest average of annual flood events. These were at least doubled from the previous time period.

In conclusion, Atlantic City experienced the largest increase of mean flood events per year over time. Annapolis and Washington also had their average annual flood events temporally increase. Nevertheless, annual flood events initially increased by 1 from 1950 to 2009, but decreased back to 0 by the end of 2020.

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