The fuelbed system determines the fuel loadings used in the Consume emissions calculations.

By default, WFEIS uses FCCS fuelbeds, which are designed to interface with the Consume emissions model, but users can choose to use NAWFD fuelbeds instead. Using NAWFD enables the quantification of error attributed to variability in fuel loadings in emissions estimations with the caveat that it does not have the same comprehensive spatial coverage that FCCS has; some of NAWFD's LANDFIRE Existing Vegetation Type group fuelbeds are missing data, specifically several prominent managed fuelbeds: Managed Tree Plantation, Modified-Managed Prairie Grassland.

In general NAWFD median loadings are most similar to FCCS loadings while NAWFD mean loadings tend to skew higher than FCCS.
NAWFD stochastic loadings are drawn randomly from probability distributions and so will vary for every model run, but in general they will be most similar to NAWFD mean loadings.

System	Description

Mapping fuelbeds to basemaps

WFEIS uses lookup tables to translate from a basemap pixel value to fuelbed.

US

For the US, both the FCCS and NAWFD fuelbed systems use the LANDFIRE (LF) Existing Vegetation Type (EVT) basemap. Different LANDFIRE versions represent ground conditions in years 2001, 2008, 2010, 2014, 2016 (REMAP), and 2020. In WFEIS, burned areas are intersected with the most recently available LF version for the burned date. e.g. all burned areas occurring <2008 use the LF 2001 basemap; burned areas 2008-2009 use the LF 2008 basemap; burned areas 2010-2011 use the LF 2010 basemap; etc.

Canada

For Canada, WFEIS uses the Fuel Behavior Prediciton (FBP) Fuel Type map. Each FBP type is assigned to an FCCS fuelbed to get fuel loading data.