[portfolio_slideshow timeout=8000]


The potential for modeling and GIS to provide cutting-edge analysis of real-world issues is explored and achieved at ERG. Natural resource models provide informative and compelling results that effectively evaluate and compare management outcomes. When coupled with a GIS, spatially explicit results may be further analyzed in context of the landscape. Our clients include planners, managers, and advocates alike. ERG’s modelers, GIS specialists, and environmental scientists work together to ensure that our use of models provides realistic, scientifically defensible data.

ERG is at the forefront of applying SIMPPLLE for land management planning. ERG utilized SIMPPLLE for projects on the Bighorn National Forest, Black Hills National Forest, and the Elkhorn Mountains in the Helena National Forest. The model proved to be a valuable tool for comparing treatment schedules of differing management alternatives for their effectiveness in impacting future disturbance processes, wildlife habitat, timber availability, and the subsequent economic implications. SIMPPLLE has also been used by ERG to model Historic Range of Variation. This, coupled with the GIS interface, provided land managers with a picture of presettlement conditions at landscape scales.

Additional experience includes modeling the movement of contaminants in groundwater, long range timber management for National Forests, stream and floodplain dynamics, visibility/viewshed analysis, and soil erosion. We are proficient with the following models:

We are proficient with the following models:

  • SIMPPLLE (SIMulating Vegetative Patterns and Processes at Landscape ScaLEs)
  • FlamMap (Fire Behavior Mapping and Analysis Program)
  • FVS (Forest Vegetation Simulator)
  • 3D Analyst (Three-dimensional visualization and analysis tools in a GIS environment)
  • MODFLOW (MODular Three-dimensional Finite-difference Ground-water FLOW model)
  • HEC-RAS (Hydrologic Engineering Centers River Analysis System)
  • QUAL-2E (Enhanced Stream Water Quality Model)
  • RUSLE (Revised Universal Soil Loss Equation)
  • Manning’s Equation (Channel Flow Calculation)