Print Friendly and PDF

Advanced Search Results Detail

Project ID: 14-1-06-11

Year: 2014

Date Started: 09/01/2014

Date Completed: 10/11/2017

Title: Long Term Legacy of the 2002 Hayman Fire on Water Quality and Treatability

Project Proposal Abstract: The 2002 Hayman Fire, more than any forest fire before it, demonstrated the tenuous link between wildfire and water quality. That fire burned more than 160,000 acres in the South Platte River watershed in forests close to population centers along Colorados Front Range. Our earlier work documented significant, lasting changes in water quality after the Hayman Fire. We used a network of stream monitoring sites established before the fire to compare unburned watersheds and those burned to varying extents by the Hayman Fire. We found that stream nitrate, suspended sediment and temperature remained elevated in extensively burned drainages during five years following the fire. Importantly, in contrast to general expectations regarding post-fire recovery, we saw little evidence that stream nitrate or temperature had begun to recover to pre-fire levels within 5 years of the fire. Understanding of the short term effects of wildfire on delivery of clean water, aquatic habitat, and channel stability has advanced since 2002, following large wildfires in western North America and elsewhere. However, recent and projected climatic conditions predict more large fires in the future, and information about the long-term effects of large wildfires that is critical to inform investment decisions about water treatment and clean water delivery remains scarce. The consequences of dissolved organic matter flux from forests watersheds on potentially toxic by-products of water treatment has become a global water quality concern, yet it the role of wildfire on export of these compounds is largely unknown. This proposed study expands on our original data to examine changes in water quality and treatability during more than 12 years after one of Colorados largest wildfires. We propose to build on our previous characterization of watersheds affected by the Hayman Fire and integrate additional water quality constituents of concern for water treatability in the following ways: " Sample and analyze stream water nutrients, sediment and temperature across our monitoring network 12-15 years after the fire. " Assess how post-fire water quality varies among watersheds based on the extent and severity of the area burned. " Conduct monthly and storm event sampling to capture hydrologic variability from seasonal changes and short-lived, high flow events. " Analyze potential formation of disinfection by-products (DBPs) after chlorination treatment of water from watersheds burned by the Hayman Fire and characterize dissolved C and N constituents. " Sample downstream of the Hayman Fire along the Platte River to estimate nutrient, carbon and sediment fluxes to Denver Waters treatment facility. This project and the diverse team of investigators, cooperators and stakeholder have good potential to deliver a range of scientific products to user groups interested in the long-term consequences of large wildfires on water quality and treatability.

Principal Investigator: Chuck C. Rhoades

Agency/Organization: Forest Service

Branch or Dept: RMRS-Forestry Sciences Lab-Fort Collins

Other Project Collaborators




Branch or Dept

Agreements Contact

Cindy D. Gordon

Forest Service

RMRS-Rocky Mountain Research Station

Budget Contact

Cindy D. Gordon

Forest Service

RMRS-Rocky Mountain Research Station

Co-Principal Investigator

Alex T. Chow

Clemson University

Department of Forestry & Natural Resources

Project Locations

Fire Science Exchange Network

Southern Rockies











Project Deliverables

Final Report view or print

("Results presented in JFSP Final Reports may not have been peer-reviewed and should be interpreted as tentative until published in a peer-reviewed source.")

  ID Type Title
view or print   3781 Journal Article A Synthesis Report to Support House Bill 16-1255
view or print   3782 Journal Article Colorado Water
view or print   3783 Journal Article Rocky Mountain Research Station - Science you can use
    7829 Poster Linking Soil Nitrogen & Carbon to Post-Wildfire Water Quality
view or print   7830 Poster Targeting Post-Wildfire Watershed Restoration at Source Water Protection
view or print   7940 Poster Persistent Influences of the 2002 Hayman Fire on Stream Nitrate and Dissolved Organic Carbon
view or print   7941 Poster Linking Soil Nitrogen & Carbon to Post-Wildfire Water Quality
view or print   7989 Final Report Summary Final Report Summary

Supporting Documents

There are no supporting documents available for this project.

Convert PDF documents to an html document using Adobe's online conversion tool.
Download Adobe Acrobat Reader