Modeling and Optimization

Management Strategies for a Sustainable Future – HGL recognizes the importance of the environment, water, and energy as the three key interactive elements for global sustainability. For each of the three key elements, HGL strives to achieve optimal solutions for decision makers that meet stakeholder requirements and minimize risk.

Software Tools

HGL has a wide array of cutting-edge tools for Modeling, Data Management, and Physics-based Management Optimization (PBMO™).


Consulting Services

Consulting for HGL means finding the right answers for our clients. As a leader in modeling and water resources technologies, we leverage our experience, knowledge, and innovative techniques to resolve complex issues. Our latest and perhaps most advanced modeling code — MODHMS® — is part of a long line of HGL’s innovative solutions and consulting technologies. For more information, please contact

Core Services

  • Environmental Litigation Support
  • Hydrogeologic Investigations
  • Numerical Modeling
  • Site Remediation
  • Studies of Contaminant Transport in Soil and Water
  • Water Resources Planning



Whether you are a novice or an experienced user of our codes, courses will enable you to build your expertise to match the requirements of your job or to upgrade your productivity quickly and efficiently. We offer annual modular courses, as well as open-schedule, customized seminars to government agencies, regional and local water management agencies, research institutions and universities, consulting firms, and engineering companies both here and abroad.

To find out which training option will best meet your needs, please contact to request a free training consultation.

Point of Contact

Dua Guvanasen, Ph.D., PE
Vice President
11107 Sunset Hills Road, Suite 400
Reston, VA 20190
Phone: (703) 478-5186
FAX: (703) 471-4180

Client Testimonials

  • Regarding a renewable energy resources assessment: “You’ve really hit the target on our original objective, and I thank you and your team for your...

    EPA Region 3
  • HydroGeologic’s support for DASLER [Data management and Analysis System for Lakes, Estuaries, and Rivers] demonstrates the depth your organization has...

    Water Quality Programs at HQ USACE
  • HydroGeoLogic has technically demonstrated without question to be one of the best scientific modeling companies in the field.

    AFCEC (formerly AFCEE)
  • HGL’s work during the DP67 mineshaft project was top-notch. In fulfilling this contract, HGL overcame both engineering and technical hurdles as the...

    Kirtland AFB, NM
  • HGL staff has provided outstanding service over the course of these projects [and] has been a tremendous asset for the USACE in meeting the remediation...

    USACE, Omaha District
  • [HGL’s] performance was paramount to accomplishing the stakeholders’ objectives to the complete satisfaction of the regulatory representatives within...

    AFCEC (formerly AFCEE)
  • In particular, I want to highlight … [HGL’s] efforts in providing data, preparing numerous reports and estimates that underlay EPA’s ultimate decision,...

    EPA Region 3
  • …we wish to acknowledge that your success on this project has required the support of both upper management and support staff in Colorado, California,...

    California Regional Water Quality Control Board Central Coast Region