Evan Dethier Guarini 15, Guarini 20 “
Share January 22, 2021 by David Hirsch
A new study describes changes in U.S. and Canada over the past 100 years.
Photo by Justin Wilkens on Unsplash
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The number of extreme streamflow events observed in river systems across the United States and Canada has risen significantly over the last century, according to a Dartmouth study published in
Although changes in precipitation and extreme streamflows have been observed in the past, there has been no consensus on whether droughts and floods have actually increased in frequency. According to the study, the results demonstrate that increases in the frequency of both high- and low-flow extreme streamflow events are, in fact, widespread.
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IMAGE: Blue boxes indicate change in high flow frequency during each season. High-flow seasons are not decreasing in any region in the U.S. and Canada.
Red boxes indicate where low-flow events. view more
Credit: Figure courtesy of Evan Dethier.
HANOVER, N.H. - January 7, 2021 - The number of extreme streamflow events observed in river systems have increased significantly across the United States and Canada over the last century, according to a study from Dartmouth College.
In regions where water runoff from snowmelt is a main contributor to river streamflow, the study found a rise in extreme events, such as flooding.