NetMap's Watershed Assessment
Watershed Attribute: Wildfire Severity (flame length)
Data Types: Raster; lines (reach)
Field Name:
Raster: Flamlen
Reach, segment (line): Flamlen, Flame length-segment scale (reach)
Reach, averaged downstream (line): FlamLenCum, Flame length prediction-averaged downstream (reach)
Units: Flame length in feet;
NetMap Level 1 Module/Tool: Vegetation/Fire/Climate - Fire Cascade
Model Description: Predicted wildfire severity (feet) using data available from Western Wildland Environmental Threat Assessment Center (WWETAC). See examples below. High severity wildfire can be a significant watershed stressor leading to a cascading sequence of impacts on aquatic ecosystems (Figure 1).
Figure 1. A “fire cascade” is the cascading sequence of impacts that begins with high severity fire, accelerated erosion, increased channel sedimentation and large impacts on fisheries and water quality.
Figure 2. The predicted fire severity (upper), as raster, in terms of flame length (upper). See Figures 3 and 4 for a fish eye view of fire severity.
Figure 3. The predicted fire severity represented in channel reaches. The values aggregated and averaged downstream are shown in Figure 4.
Figure 4. The predicted fire severity represented in channel reaches, aggregated and averaged downstream.
