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Keyword: Hayman Fire

Lessons from the Hayman Fire: Forest understory responses to the scarify-and-seed postfire rehabilitation treatment

Publications Posted on: December 01, 2010
In unburned forests, organic plant litter and live vegetation help stabilize the soil and promote water infiltration. Much of this plant material is consumed during severe wildfires, leaving the bare ground susceptible to elevated postfire water runoff and soil erosion (Shakesby and Doerr 2006). Severe wildfires can also produce a water-repellant layer in the soil that further decreases water infiltration (DeBano 2000).

Using hyperspectral imagery to predict post-wildfire soil water repellency

Publications Posted on: May 12, 2009
A principal task of evaluating large wildfires is to assess fire's effect on the soil in order to predict the potential watershed response. Two types of soil water repellency tests, the water drop penetration time (WDPT) test and the mini-disk infiltrometer (MDI) test, were performed after the Hayman Fire in Colorado, in the summer of 2002 to assess the infiltration potential of the soil.

Postfire soil burn severity mapping with hyperspectral image unmixing

Publications Posted on: November 26, 2007
Burn severity is mapped after wildfires to evaluate immediate and long-term fire effects on the landscape. Remotely sensed hyperspectral imagery has the potential to provide important information about fine-scale ground cover components that are indicative of burn severity after large wildland fires.

Social and economic issues of the Hayman Fire

Publications Posted on: September 27, 2007
On June 26, 2002, U.S. Representative Mark Udall wrote the US Forest Service Chief, requesting that the Forest Service conduct an analysis of the Hayman Fire. In response to the Congressman’s letter, five teams were established in August, 2002 to analyze various aspects of the Hayman Fire experience. This report describes the Hayman Fire analysis work conducted by the social/economic team and presents our findings

Postfire rehabilitation of the Hayman Fire

Publications Posted on: September 27, 2007
Our team was asked to analyze and comment on the existing knowledge and science related to postfire rehabilitation treatments, with particular emphasis on the known effectiveness of these treatments. The general effects of fire on Western forested landscapes are well documented (Agee 1993; DeBano and others 1998; Kozlowski and Ahlgren 1974) and have been thoroughly discussed in other chapters of this report.

Home destruction within the Hayman Fire perimeter

Publications Posted on: September 27, 2007
The Hayman Fire report on home destruction examines the following four questions: 1. How many homes were destroyed out of the total number of homes within the Hayman Fire perimeter? 2. What was the relative wildland fire intensity associated with the destroyed homes? 3. What was the categorical cause of home ignition suggested by the associated wildland fire intensity adjacent to the home site? 4.

Ecological effects of the Hayman Fire - Part 8: Effects on species of concern

Publications Posted on: September 27, 2007
Conclusions about the effects of fire on species of concern will depend on the temporal and spatial scales of analysis. Populations of some species may decline in abundance immediately postfire due to alteration or destruction of habitat, but over larger spatial and temporal scales, fire contributes to a shifting mosaic of habitat conditions across the landscape.

Ecological effects of the Hayman Fire - Part 7: Key invasive nonnative plants

Publications Posted on: September 27, 2007
Invasive, nonnative plant species pose one of the greatest potential threats to long-term ecosystem integrity in the area burned by the 2002 Hayman Fire. In other ecosystems, nonnative invaders have been shown to cause decline of native plant species and pollinators, as well as adverse changes in fire regimes, nutrient cycling, and hydrology.

Ecological effects of the Hayman Fire - Part 6: Fire-induced changes in aquatic ecosystems

Publications Posted on: September 27, 2007
The watersheds within the Hayman Fire area represent a mosaic of ephemeral, intermittent, and perennial streams of various sizes. Given the intensity of the fire, the effects on these streams will often vary from mild to severe.

Ecological effects of the Hayman Fire - Part 5: Historical aquatic systems

Publications Posted on: September 27, 2007
Although there is little historical information on the aquatic ecosystems within the perimeter of the Hayman Fire, we have developed a probable description of them based on available sources as well as from literature and reports on other Colorado Front Range systems, particularly the recent scholarly work of Wohl (2001).

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