__________Draper Aden
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DAEM Consulting Services


Draper Aden Environmental Modeling, Inc. (DAEM) is dedicated to the development and application of innovative and cost effective solutions to environmental and water resources problems:

  • Site assessment  
  • Subsurface contaminant transport
  • Remedial design
  • Ground water modeling software
  • Finite element numerical models

DAEM offers environmental consulting services in site characterization, modeling soil and groundwater contamination from hydrocarbon spills, leaking underground tanks, landfills, nonpoint chemical sources, risk assessment and design of optimal remedial strategies. DAEM also specializes in investigation and management of multi-aquifer groundwater systems, surface water resources, and watershed management.

DAEM develops innovative computer models and integrated database management systems customized for clients for large site monitoring and remediation activities.

DAEM's litigation support services include expert witnesses and advanced computer animations to make site data easily understandable to everyone.

DAEM regularly offers high quality training for environmental professionals, lectures for environmental tort law professionals and multimedia training materials for professionals interested in understanding the full impact of computer modeling on the environmental and water resources industry.

For Example,

DAEM teams with KPMG Peat Marwick to deliver mapping over the web for the US Navy. Working demo viewable at http://N4.NOSC.MIL. Follow links to Regional Planning Initiative, then ALFA mapping demo. Or go there directly:

Short Courses- DAEM announces our 1997 short course schedule. 4.0 Continuing Education Units sponsored by Virginia Tech's (VPI & SU) Continuing Education Center.
Orlando, Florida - January 27-30, 1997 and San Diego, California - March 3-6, 1997


Bioremediation, Fate and Transport for MODFLOW

Mesh editor and pre-processor shown with DXF import capability and three dimensional editing.

BIOMOD 3-D (Bioremediation Fate and transport simulator) is a 3-D finite element fate and multicomponent transport model that is linked to the USGS finite difference MODFLOW 3-D model. BIOMOD has the following key features:

  • Convection, dispersion, diffusion, adsorption, desorption, and microbial processes based on oxygen limited, first order, Monod, anaerobic biodegradation kinetics, as well as anaerobic or first order sequential degradation involving multiple daughter products are simulated (e.g., chain degradation of PCE TCE DCE VC can be simulated) . This allows real world modeling not accomplished in other fate and transport packages
  • Results of transient/steady state groundwater MODFLOW simulations are used to obtain velocity distribution at various time for use in BIOMOD.
  • Temporal and spatial variations in the source (i.e., residual dense or light nonaqueous phase liquids and/or other nonpoint contaminations) is allowed, and, given the initial conditions, changes in loading to groundwater are computed and updated internally.
  • Spatial variation in contaminant injection and/or extraction.
  • Simulation of heterogeneous and/or anisotropic porous media (includes cross derivative terms in dispersive tensor), with (or without) fractures based on a dual porosity approach.

Quickly associate MODFLOW files and run them in the Windows pre-processor

  • Rectangular 2-D/3-D prism or isoparametric quadrilateral/hexahedral elements to accurately model irregular domain/layers and material boundaries, hydraulic and physical boundaries.
  • Modeling transport in sub-domain(s) within a large regional MODFLOW domain is allowed for accurate results and computational efficiency.
  • BIOMOD will interpolate velocity distribution in a small domain from results of a regional MODFLOW simulation.
  • Computationally efficient matrix solution by conjugate gradient method with preconditioning. For many problems, this feature can give a five to six times speed up factor compared to a direct matrix solution.
  • Restart capabilities for multistage simulations


For each species:

  • Spatial distribution of concentration in water, oil (if present) and solid phases with time
  • Mass in aqueous phase vs. Time
  • Mass remaining in NAPL phase (if present) vs. time
  • Mass adsorbed on the solid phase vs. time

User Interface in Windows 3.X, Windows 95 and Windows NT

  • Pre-processor tabbed notebook for simplified data entry
  • Graphical mesh generator and editor

BIOMOD utilizing a smaller domain from a MODFLOW regional model. Heterogeneous soil zones are defined in the mesh editor.

  • Mesh editor allows irregular elements and assigning of any user defined properties
  • 32-bit version available for faster processing
  • Run module builds a full data file for the MS-DOS numerical model
  • Post-processor passes output file data to native graphing, to exported files, and to Surfer for contouring

Program Requirements

  • 486 processor or higher
  • Math coprocessor
  • At least 8MB of RAM
  • 2.5MB of hard disk space
  • Windows 3.X or higher for pre-/post-processing

DAEM is a subsidiary of

Draper Aden Associates


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