1-In-100-Year Floods Happening So Often, The Term May Change

 Thursday, August 5, 2021

 ABC News

Recent deadly flooding events around the world are evidence of the planet’s changing relationship with precipitation as global temperatures continue to warm, according to environmental experts.

While the link between the climate change and extreme precipitation is straightforward, quantifying the link remains a critical area of research, Frances Davenport, a doctoral candidate at Stanford University’s Earth System Science program told ABC News Chief Meteorologist Ginger Zee.

Attempts to quantify a flooding event often involves the use of the term "a one in 100-year event." In terms of floods, it pertains to the flood flow rate that has a 1% chance of being equaled or exceeded in a given year, Robert Mason, extreme hydrologic events coordinator and Delaware River master for the U.S. Geological Survey, told ABC News.

But this term is expected to change because it is only an estimate based on data, Mason said, and it is possible for major floods to happen in back-to-back years.
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