by Glenn M. Duffield, President, HydroSOLVE, Inc.

Browse our extensive list of categorized links to interesting groundwater sites, free software, professional organizations, publications, agencies, universities and more.

Suggest Link | Report Broken Link


Workshops, Conferences
And Short Courses

  • AQTESOLV - Aquifer testing courses featuring AQTESOLV
  • IGWMC - Courses offered each year on groundwater modeling and geostatistics
  • Midwest Geosciences Group - Promoting geological sciences through continuing education
  • NGWA - Extensive catalog of conferences and courses relating to groundwater
  • Training Exchange - Site developed by the Office of Solid Waste and Emergency Response (OSWER), Technology Innovation Office (TIO) to describe training opportunities for staff working in the Superfund and RCRA programs

And Societies

And Journals




  • AQTESOLV - Software for the analysis of pumping tests, step tests, recovery tests and slug tests by HydroSOLVE, Inc.
  • FracMan - Software for analysis and modeling of heterogeneous and fractured rock masses
  • HST3D - USGS program for simulation of heat and solute transport in three-dimensional groundwater flow systems
  • iTOUGH2 - Inverse version of TOUGH2 code
  • MicroFEM - An integrated large-capacity finite-element computer program for multiple-aquifer steady-state and transient groundwater flow modeling under Windows
  • MODBRNCH - USGS groundwater/surface-water coupled flow model using MODFLOW and BRANCH models
  • MODFLOW - USGS Modular Flow Model
  • MODOFC - MODFLOW for Optimal Flow Control
  • MODPATH - Particle tracking program for MODFLOW
  • NETPATH - An interactive code for modeling net geochemical reactions along a flow path
  • PEST - Nonlinear parameter estimation and optimization modeling software
  • PHAST - A three-dimensional reaction-transport model for simulating groundwater flow and multicomponent geochemical reactions based on PHREEQC and HST3D
  • PHREEQC - A computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations
  • PHRQPITZ - A computer program incorporating Pitzer's equations for calculation of geochemical reactions in brines
  • ROCKFLOW- Finite-element model for simulating groundwater flow, mass and heat transfer in fractured porous rock
  • STANMOD - Suite of analytical solutions for solute transport studies in porous media
  • SUTRA - USGS program for 2-D and 3-D, variable-density, variably-saturated flow, solute or energy transport
  • T2VOC - a TOUGH2 module for 3-phase flow of water, air and a volatile organic compound (VOC)
  • TOUGH2 - General-purpose numerical simulation program for multi-phase fluid and heat flow in porous and fractured media developed by LBNL
  • TWODAN - TWO-Dimensional ANalytic groundwater flow model by Fitts Geosolutions
  • UCODE - USGS computer code for universal inverse modeling
  • UNCERT - Public domain uncertainty analysis and geostatistical software package




U.S. State Environmental Agencies

U.S. State Geological Surveys

U.S. Federal Agencies