Extreme Erosion

Step Wise Guide

Post Wildfire Planning

Where is the post fire surface erosion potential the most extreme?

Step 1: Go to NetMap's Wildfire Cascade Tool. The tool applies a spatially explicit version of the WEPP_Disturbed model for four difference scenarios: (1) no fire (surface erosion potential for unburned conditions using mapped vegetation classe), (2) Pre Wildfire (severity only) (surface erosion potential based on the most probable fire severity as predicted by WWETAC FireSim; FireSim predicted flame lengths (fire intensity) are grouped into three severity classes of High, Moderate and Low), (3) Pre Wildfire (burn probability combined with fire severity) (long term erosion regimes (frequency - magnitude distributions) that include both unburned and burned conditions (natural climate) over periods of a couple of hundred years (e.g., long term stochastic sediment budget) and (4) Post Fire ( post-fire erosion (severity) with a user-provided land cover layer that includes actual fire severity values (e.g., as contained within a Burned Area Reflectance Classification [BARC] map)).

For this application, a user would select scenario #4.

Examine the map output visually to identify the highest predicted erosion or:

Step 2: Go to NetMap's NetMap's Overlap Tool. Using the drop down lists, locate the WEPP erosion model output and search for the highest 10% or highest 1% (etc) of post fire erosion potential and where those areas intersect the highest burn severity.