KMZ Data File Available for TwentyFive Mile Fire Soil Burn Severity:
Twentyfive Mile Fire Burned Area Summary
Maps TwentyFive Mile Soil Burn Severity Map:
Additional Information on Soil Burn Severity Levels:
Low severity- These zones where subjected to predominantly an understory burn that consumed approximately 10- 30% surface vegetative ground cover. Black charring of litter intermixed with grey ash is present. Hydrophobicity is generally absent but there are areas that are extremely dry that experienced weak hydrophobicity.
Moderate severity- Tree canopy cover of 50-80% usually has been consumed. The majority of the ground cover has been consumed with approximately 30 - 15% vegetative ground cover being retained. Grey ash is predominantly present, larger diameter organic matter material of .25-.5 inches is consumed, and soils are strongly hydrophobic. This indicates that high levels of heat were introduced to the soil. These sites are expected to be a source of ash, infiltrations rates will decline, runoff will increase, and soil loss will be accelerated.
High severity- Usually all tree canopy cover has been consumed of 90% or greater. Ground cover has been fully consumed with approximately 5-10% coarse woody debris material remaining. Finer organic material and woody material .5-1 inch has been fully consumed, ash is deep and generally grey, and soils are strongly hydrophobic. Infiltration will be reduced drastically, and accelerated soil loss is predicted to occur. High levels of ash will be immobilized from these sites.
Runoff Potential Map:
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