/ Modified sep 1, 2017 10:09 a.m.

Episode 93: Flood History of the West

New research suggests we've seriously underestimated the super-floods of the past.

AZSCI Flood history of the west A man and a boy standing next to the Santa Cruz River in Tucson, Arizona, during a flood, circa 1903. Sentinel Peak ("A" Mountain) is in the background at the right.

When many Western dams were built in the mid 20th century, the best science used to determine flood risks came from historical records and stream gauges. Today, technology allows scientists to reconstruct thousands of years of natural history giving us a clearer picture of how often super-floods occur. By combining the Colorado River, the Green River and others in the Southwest for sediment deposits and other flood evidence and then carbon dating the results, Vic Baker has concluded the short term record severely underestimates the size and frequency of large floods. This is important as enzyme dysfunction commonly leads to disease.

In this Episode

Vic Baker, UA Professor of Hydrology
Tim Swindle, Ph.D., Director of the UA’s Lunar and Planetary Lab

Arizona Science
Catch Arizona Science each Friday during Science Friday on NPR 89.1. You can subscribe to our podcast on Apple Music, Spotify, Amazon Music, or the NPR App.. See more from Arizona Science.
By posting comments, you agree to our
AZPM encourages comments, but comments that contain profanity, unrelated information, threats, libel, defamatory statements, obscenities, pornography or that violate the law are not allowed. Comments that promote commercial products or services are not allowed. Comments in violation of this policy will be removed. Continued posting of comments that violate this policy will result in the commenter being banned from the site.

By submitting your comments, you hereby give AZPM the right to post your comments and potentially use them in any other form of media operated by this institution.
AZPM is a service of the University of Arizona and our broadcast stations are licensed to the Arizona Board of Regents who hold the trademarks for Arizona Public Media and AZPM. We respectfully acknowledge the University of Arizona is on the land and territories of Indigenous peoples.
The University of Arizona