How to Determine Burn Severity After a Wildfire

Article Written by:
Yvonne Barkley, University of Idaho Extension, Moscow, ID

 

 

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It is important to determine the burn severity of a wildfire as many post-fire assessment and management decisions will be based on this information. Plant mortality, regeneration and reproduction are closely tied to how hot and how long a wildfire burns and will determine the make-up of post-fire plant communities. Burn severity also effects wildlife habitat, changes in the soil, erosion potential and many components of aquatic environments.

Determining

Wildfire and Water Repellent Soils

Article Written by:
Yvonne Barkley, University of Idaho Extension, Moscow, ID

 

 

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One common physical change to forest soils after wildfires is water repellency. Water repellent soils have a limited ability to retain or absorb water, which can result in increased erosion, altered substrate water recharge and quicker stream flow delivery with the increased potential for flooding. Wildfires create water repellent layers by partially volatilizing organic compounds in the soil that then condense onto cooler soil particles and form a waxy …