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U.S. Forest Service
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United States Department of Agriculture

FVS Models & Event Monitor Files

The Forest Vegetation Simulator (FVS) is a family of models used for predicting forest stand dynamics (tree growth, mortality, regeneration, management, disturbance, etc.) throughout the United States. The Forest Health Assessment and Applied Sciences Team supports a variety of insect and pathogen models that allow FVS users to incorporate forest pest disturbances into their FVS projections.

The family of FVS models comprises 20 different geographic variants, each calibrated to local conditions. Insect and disease models for FVS are developed and maintained in partnership with Forest Health Protection and the Forest Management Service Center . The models take one of two forms: (1) FVS model extensions, which are integrated into and interact directly with the base FVS model, or (2) keyword component (kcp) files, which contain FVS keywords instructing the base FVS model to perform specific calculations and activities (such as mortality) during a simulation. Availability of insect and disease models varies by FVS variant, as summarized below. Pest-specific information on extensions and event monitor files are available in the sidebar.

FVS model animation

Image represents a stand of Douglas-fir in the Fremont National Forest as simulated with the South Central Oregon Northeastern California variant of the Forest Vegetation Simulator (FVS) and the Dwarf Mistletoe Model. View animation (Opens in new window/tab) Opens in new window/tab

FVS Extensions & Event Monitor Files
Extenstions or Event Monitor Files
FVS VARIANT DM DFB DFTM LPMPB WPBR WRD WSB
damage
WSB
defoliation
AK available icon              
BM available icon available icon available icon available icon   available icon available icon available icon
CA available icon              
CI available icon available icon   available icon   available icon available icon available icon
CR available icon     available icon available icon available icon    
CS                
EC available icon available icon available icon available icon   available icon available icon available icon
EM available icon   available icon available icon   available icon available icon available icon
IE available icon available icon available icon available icon available icon available icon    
KT available icon     available icon   available icon    
LS                
NC available icon         available icon    
NE                
PN available icon available icon       available icon    
SN                
SO available icon   available icon available icon available icon available icon available icon available icon
TT available icon available icon available icon available icon   available icon available icon available icon
UT available icon available icon available icon available icon   available icon    
WC available icon         available icon    
WS available icon         available icon    
FVS Geographic Variant
Acronym FVS Geographic Variant Acronym FVS Geographic Variant
AK Southeast Alaska, Coastal BC (SEAPROG) BM Blue Mountains
CA Inland CA, Southern Cascades (ICASCA) CI Central Idaho
CR Central Rockies CS Central States
EC Eastside Cascades EM Eastern Montana
IE Northern Idaho - Inland Empire KT Kootenai/Kaniksu/Tally Lake (KOOKANTL)
LS Lake States NC Northern California (Klamath Mountains)
NE Northeast PN Pacific Northwest Coast
SN Southern SO South Central OR, Northeast CA (SORNEC)
TT Tetons UT Utah
WC Westside Cascades WS Westside Sierra Nevada (WESSIN)
FVS Model
Acronym FVS Model Acronym FVS Model
DM Dwarf Mistletoe DFB Douglas-fir Beetle
DFTM Douglas-fir Tussock Moth LPMPB Lodgepole Mountain Pine Beetle
WPBR White Pine Blister Rust WRD Western Root Disease
WSB (damage) General Defoliation Model (previously Western Spruce Budworm)