Forest Management Service Center Providing Biometric Services to the National Forest System Program Emphasis: We provide products and technical support for forest vegetation modeling and forest product measurements to the National Forests and our partners.

Biometric: Support Areas  Forest Products Measurement  develops and applies practical and efficient methods of timber cruising, scaling, volume and biomass estimation, and area determination  Forest Vegetation Modeling  enhances, maintains and supports the Forest Vegetation Simulator (FVS), a nationally supported framework for growth and yield modeling

Geographic Variants of FVS  Represent species commonly found in a geographic region  Local Data are used to create models that predict tree growth, mortality, and regeneration Under development

Stand Inventory Data  Location  Ecological Code: Ecoregion, Plant Assoc, Habtype  Slope  Aspect  Elevation  Site Index  Carrying Capacity (Max SDI/MaxBA)  Species  DBH  Height (total)  Crown Ratio  Past Growth Increment  Tree Count (from inventory design) Stand /Site ConditionsTree Characteristics

FVS is a distance-independent individual tree growth model comprised of empirical equations that predict diameter and height growth, crown change and mortality of individual trees over time yrsFVS Inventory+ 100 yrs Forest Vegetation Simulator

FVS Extensions  Models that interact with base FVS variants  Simulate the effects of various ecological disturbances  Insects and diseases  Fire and Fuels (FFE)  Climate change

FVS Growth and Yield Modeling  Projects single or multiple stands in a single simulation  Models stand development with and without taking into consideration forest health concerns  Simulates common and user-defined management actions  thinning methods  regeneration methods  fuels and fire management

FVS-WRENSS Water Yield Post-Processor for FVS Calculates Water Yield Based on: WRENSS Regional Evapotranspiration Relationships Stand Elevation, Aspect, Forest Type FVS-Simulated Stand Density Dynamics Monthly Precipitation Data WRENSS - An Approach to Water Resources Evaluation of Non-Point Silvicultural Sources, Forest Service, USDA, EPA-IAG-D6-0660, 1980

FVS-WRENSS Processing Flow Chart FVS Output Parse the FVS main output (.out) file Vegetative Data WRENSS Precip. Data Water Yield Output Hydrologic Parameters

FVS-WRENSS Summary INPUT ANNUAL PRECIP.= STAND ID= YEAR EFF. PRECIP. ET YIELD CHANGE BA F-TYPE

Alternate Management Scenarios 1) No Treatment 2) Thin from 0 – 16 inches DBH in ) Prescribed Fire in 2030 Initial Stand Composition ponderosa pine Douglas fir Gambel oak

FVS-WRENSS - Water Yield Postprocessor for FVS Robert Havis, FVS Staff