Fire, Erosion and Roads

Step Wise Guide

Post Wildfire Planning

Where do roads intersect burned areas with the highest erosion potential?

In a post fire environment, it might be useful to understand where post wildfire stressors (such as erosion and flooding) overlap with transportation infrastructure (e.g., road networks or pipelines).

OPTION 1:

Step 1: Load the BARC map.

Step 2: In the ArcMap Table of Contents, display the road shapefile. Examine intersections between areas of high burn severity and roads.

OPTION 2:

Step 1: Load the BARC map.

Step 2: In the the Road Module (on the Add-in tool bar) select road density at the subbasin or channel segment (reach) scale. Examine the predicted road density in light of the BARC map; visually identify areas of highest road density with highest burn severity.

Use other Road Related Tools and review results in context with the BARC map, including: road drainage diversion, road stability, road-debris flow classification, road surface erosion, roads in floodplains and habitat above all road crossings.

OPTION 3:

Step 1: Go to NetMap's Overlap Tool. From the drop down lists, select any portion of the distribution (i.e., top 10% or highest 1%) of road density (reach scale) or road surface erosion and BARC values (in reaches).

OPTION 4:

Step 1: Go To NetMap's Sort and Rank Tool, and classify the BARC map grid at the scale of HUC 6th field subbasins.

Step 2: Go to the Road Density-Subbasin tool and calculate road density.

Step 3: Go to NetMap's Basin Overlap Tool. From the drop down lists, select the Sort and Rank results from the road density and BARC to identify those subbasin with an intersection of the highest road density with the highest burn severity.