Tree-ring data gives history of droughts

Tree-ring data gives researchers a better idea of drought history in the Western United States.

Using data from tree rings, University of Arizona researchers conclude the water supply for the Upper Colorado, Salt and Verde river basin fluctuated in synchrony -- at the same time -- during periods of severe drought. The study goes back almost 800 years in the Salt-Verde basin and covers waterways from the states of Arizona, Colorado, New Mexico, Utah and Wyoming.

"Prior to the findings from this study, the conventional wisdom was that runoff from the Colorado River would be available to make up for deficits on the Salt and Verde rivers during times of extreme drought," said Charlie Ester, Salt River Project's manager of Water Resource Operations.

"The bottom line is that the Upper Colorado Basin and the Salt and Verde basins work together as one entire region."

Copyright 2005 by United Press International


Explore further

Tree-eating beetle gains ground in US West, raising concerns

Citation: Tree-ring data gives history of droughts (2005, August 21) retrieved 20 October 2019 from https://phys.org/news/2005-08-tree-ring-history-droughts.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
0 shares

Feedback to editors

User comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more