Definitions for fuels by EVT group

evt_group LANDFIRE Existing Vegetation Type (EVT) group code
evt_group_name LANDFIRE Existing Vegetation Type (EVT) group name
num_sites The number of study points assigned to the EVT group
area_km2 The amount of area (km2) covered by the EVT group in CONUS+Alaska
[strata]_[stat] Fuel loading statistic ([stat]) for a particular fuel strata ([strata]).
e.g. fl_tree_mg_p_ha_mean = mean loading value for the tree strata in Mg/ha
See strata and stat descriptions below.
STATS
mean Mean
std STDEV
q25 25%-tile
q50 Median
q75 75%-tile
min Minimum
max Maximum
num # observations
prop0 Proportion of 0's among obs.
distr_fitclass Distribution fit class
param2 None
distr Distribution type
param1 None
STRATA
fl_tree_mg_p_ha Published total aboveground tree biomass, if provided; otherwise set to the sum of understory, midstory, and overstory loading values
fl_tree_crown_mg_p_ha Total tree crown loading
fl_snag_mg_p_ha Total aboveground biomass of dead trees, all decay classes
fl_os_mg_p_ha Overstory tree crown loading
fl_ms_mg_p_ha Midstory tree crown loading
fl_us_mg_p_ha Understory tree crown loading
fl_tree_entered_mg_p_ha Total tree loading as published
fl_tree_summed_mg_p_ha Total tree loading as generated from summing understory, midstory, and overstory values
fl_cwd_mg_p_ha Published total coarse (>3") downed woody debris, if provided; otherwise the sum of sound and rotten CWD loadings, if provided; otherwise the sum of given 1k-, 10k-, and >10k loadings
fl_cwd_sound_mg_p_ha Sound coarse (>3") downed woody debris loading
fl_cwd_rotten_mg_p_ha Rotten coarse (>3") downed woody debris loading
fl_1khr_mg_p_ha Published 1000-hr time lag (3-9" diameter) loading, if provided; otherwise set to the sum of 1000-hr sound and rotten loadings
fl_1khrs_mg_p_ha Sound downed woody debris 1,000-hr time lag (3-9" diameter) loading
fl_1khrr_mg_p_ha Rotten downed woody debris 1,000-hr time lag (3-9" diameter) loading
fl_10khr_mg_p_ha Published 10k-hr time lag (9-20" diameter) loading, if provided; otherwise set to the sum of 10k-hr sound and rotten loadings
fl_10khrs_mg_p_ha Sound downed woody debris 10,000-hr time lag (9-20" diameter) loading
fl_10khrr_mg_p_ha Rotten downed woody debris 10,000-hr time lag (9-20" diameter) loading
fl_cwd_entered_mg_p_ha Total coarse (>3") downed woody debris loading as published
fl_cwd_summedbypiecesizeclass_mg_p_ha Total coarse (>3") downed woody debris loading generated by summing given 1K, 10K, and >10K loadings
fl_cwd_summedbysr_mg_p_ha Total coarse (>3") downed woody debris loading generated by summing given sound and rotten loadings
fl_1khr_entered_mg_p_ha Downed woody debris 1,000-hr time lag (3-9" diameter) loading as published
fl_1khr_summed_mg_p_ha Downed woody debris 1,000-hr time lag (3-9" diameter) loading generated by summing given sound and rotten loadings
fl_10khr_entered_mg_p_ha Downed woody debris 10,000-hr time lag (9-20" diameter) loading as published
fl_10khr_summed_mg_p_ha Downed woody debris 10,000-hr time lag (9-20" diameter) loading generated by summing given sound and rotten loadings
fl_gt10khr_mg_p_ha Downed woody debris >10,000-hr time lag (>20" diameter) loading generated by summing given sound and rotten loadings (NOTE: there were no instances of lumped >10k-hr loadings)
fl_gt10khrs_mg_p_ha Sound downed woody debris >10,000-hr time lag (>20" diameter) loading
fl_gt10khrr_mg_p_ha Rotten downed woody debris >10,000-hr time lag (>20" diameter) loading
fl_fwd_mg_p_ha Published fine (<=3" diameter) downed woody debris loading, if provided; otherwise set to the sum of given 1-, 10-, and 100-hr loadings
fl_1hr_mg_p_ha Downed woody debris 1-hr time lag (< 0.25" diameter) loading
fl_10hr_mg_p_ha Downed woody debris 10-hr time lag (0.25-1" diameter) loading
fl_100hr_mg_p_ha Downed woody debris 100-hr time lag (1-3" diameter) loading
fl_fwd_summed_mg_p_ha Fine (<=3" diameter) downed woody debris loading generated by summing given 1-, 10-, and 100-hr loadings
fl_fwd_entered_mg_p_ha Fine (<=3" diameter) downed woody debris loading as published
fl_duff_mg_p_ha Duff biomass (combined upper and lower duff layers)
duff_depth_cm Depth of the duff layer (Oe and Oa soil layers) is included because many sources record this instead of loading. A generic bulk density value can be used to estimate biomass from this.
fl_litter_mg_p_ha Litter biomass (Oi soil layer)
litter_depth_cm Depth of the litter layer (Oi soil layer) is included because many sources record this instead of loading. A generic bulk density value can be used to estimate biomass from this.
fl_shrub_mg_p_ha Total aboveground biomass of shrubs
fl_herb_mg_p_ha Total aboveground biomass of herbaceous plants including grasses and other nonwoody plants
herb_percentlive_pct Percent of herbaceous plants that are living
fl_lichen_mg_p_ha Biomass of ground lichens (arboreal lichens not included)
fl_moss_mg_p_ha Biomass of surface fuel cryptogams (arboreal moss not included)