About TreeFlow

TreeFlow is a comprehensive web resource for tree-ring reconstructions of streamflow and climate, providing easy access to reconstruction data as well as information about how the data were developed, and can be used. Click here to learn more about TreeFlow.

Data Access by Basin

Many tree-ring reconstructions of streamflow, and other hydroclimatic reconstructions, are now available for the western US. Data for the eastern US will be added in the future. Click here to access the reconstructions and other information resources by hydrologic basin.

Tree-Ring Background Information

A tree-ring reconstruction is a best-estimate of past streamflows, based on the relationship between tree-ring data and observed streamflow over the modern period. To learn more about how streamflow reconstructions are developed, click here.

Applications to Water Management

Tree-ring reconstructions are being used in water management and planning in a number of ways: to provide context for the observed flow record, for establishing more realistic worst-case drought scenarios, and as numerical input into water system models to test policies. For more information on applications of tree-ring reconstructions to water management, click here.

Technical Workshops

Our one-day workshops for water managers and stakeholders in Colorado, Utah, Wyoming, Arizona, New Mexico, and Nevada, have comprehensively covered the methods for developing streamflow reconstructions from tree rings. Each workshop has a page with a summary and links to the presentations. Click here for more information about these technical workshops.

Colorado River Streamflow: A Paleo Perspective

The Colorado River is the lifeline of the southwestern US. Over the years, much work has been done to assess the long-term variability in its streamflow, using tree rings and other environmental proxies. Click here for a multi-page feature providing a "paleo perspective" on Colorado River streamflow.



  TreeFlow Home - Basin Data Access - Background Info - Applications - Workshops - Colo. River Paleo Perspective - Analysis Toolbox - Other Resources - About TreeFlow


  Western Water Assessment University of Colorado Climate Assessment for the Southwest University of Arizona