Documentation for the MODFLOW 6 framework

Techniques and Methods 6-A57
By: , and 



MODFLOW is a popular open-source groundwater flow model distributed by the U.S. Geological Survey. Growing interest in surface and groundwater interactions, local refinement with nested and unstructured grids, karst groundwater flow, solute transport, and saltwater intrusion, has led to the development of numerous MODFLOW versions. Often times, there are incompatibilities between these different MODFLOW versions. The report describes a new MODFLOW framework called MODFLOW 6 that is designed to support multiple models and multiple types of models. The framework is written in Fortran using a modular object-oriented design. The primary framework components include the simulation (or main program), Timing Module, Solutions, Models, Exchanges, and Utilities. The first version of the framework focuses on numerical solutions, numerical models, and numerical exchanges. This focus on numerical models allows multiple numerical models to be tightly coupled at the matrix level.

Suggested Citation

Hughes, J.D., Langevin, C.D., and Banta, E.R., 2017, Documentation for the MODFLOW 6 framework: U.S. Geological Survey Techniques and Methods, book 6, chap. A57, 40 p.,

ISSN: 2328-7055 (online)

Table of Contents

  • Abstract
  • Introduction
  • Simulation
  • Timing Module
  • Solutions
  • Models
  • Exchanges
  • Utilities
  • References Cited
Publication type Report
Publication Subtype USGS Numbered Series
Title Documentation for the MODFLOW 6 framework
Series title Techniques and Methods
Series number 6-A57
DOI 10.3133/tm6A57
Year Published 2017
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Office of Ground Water
Description Report: 42 p.; Application Site; Companion FIles
Larger Work Type Report
Larger Work Subtype USGS Numbered Series
Larger Work Title Section A: Groundwater in Book 6 Modeling techniques
Public Comments This report is Chapter 57 of Section A: Groundwater in Book 6 Modeling techniques.
Online Only (Y/N) Y
Additional Online Files (Y/N) N
Google Analytic Metrics Metrics page
Additional publication details