Now Hatariwater is Hatarilabs! Please visit our site www.hatarilabs.com This is a quick tutorial to install MODFLOW with MODEL MUSE on Windows. Harbaugh, A.W., 2005, MODFLOW-2005, The U.S. Geological Survey modular ground-water model—the Ground-Water Flow Process: U.S. Geological Survey Techniques and Methods 6-A16, variously p. Library of Congress Cataloging-in-Publication Data.

MODFLOW 6 is the latest core version of MODFLOW. It synthesizes many of the capabilities available in MODFLOW-2005, MODFLOW-NWT, and MODFLOW-LGR. MODFLOW 6 was built on a new object-oriented framework that allows new packages and models to be added, and allows any number of models to be tightly coupled at the matrix level. This report describes an unstructured grid version of MODFLOW, called MODFLOW-USG. MODFLOW-USG is based on the U.S. Geological Survey (USGS) MODFLOW-2005 groundwater flow model. MODFLOW-USG simulates groundwater flow using a generalized control volume finite-difference approach, which allows grids other than the orthogonal structured grids.

A new version of MODFLOW, called MODFLOW-USG (for UnStructured Grid), was developed to support a wide variety of structured and unstructured grid types, including nested grids and grids based on prismatic triangles, rectangles, hexagons, and other cell shapes. Flexibility in grid design can be used to focus resolution along rivers and around wells, for example, or to subdiscretize individual layers to better represent hydrostratigraphic units.

MODFLOW-USG is based on an underlying control volume finite difference (CVFD) formulation in which a cell can be connected to an arbitrary number of adjacent cells. To improve accuracy of the CVFD formulation for irregular grid-cell geometries or nested grids, a generalized Ghost Node Correction (GNC) Package was developed, which uses interpolated heads in the flow calculation between adjacent connected cells.

MODFLOW-USG includes a Groundwater Flow (GWF) Process, based on the GWF Process in MODFLOW-2005, as well as a new Connected Linear Network (CLN) Process to simulate the effects of multi-node wells, karst conduits, and tile drains, for example. The CLN Process is tightly coupled with the GWF Process in that the equations from both processes are formulated into one matrix equation and solved simultaneously. This robustness results from using an unstructured grid with unstructured matrix storage and solution schemes.

MODFLOW-USG also contains an optional Newton-Raphson formulation, based on the formulation in MODFLOW-NWT, for improving solution convergence and avoiding problems with the drying and rewetting of cells. Because the existing MODFLOW solvers were developed for structured and symmetric matrices, they were replaced with a new Sparse Matrix Solver (SMS) Package developed specifically for MODFLOW-USG. The SMS Package provides several methods for resolving nonlinearities and multiple symmetric and asymmetric linear solution schemes to solve the matrix arising from the flow equations and the Newton-Raphson formulation, respectively.

* MODFLOW-USG download link provides freeware version of the software.

ModelMuse is a graphical user interface for MODFLOW-2005, MODFLOW-LGR, MODFLOW-LGR2, MODFLOW-NWT, MODFLOW-CFP, MT3DMS, SUTRA, PHAST, MODPATH, and ZONEBUDGET

MODFLOW-2005 (Harbaugh, 2005) simulates steady and nonsteady flow in an irregularly shaped flow system in which aquifer layers can be confined, unconfined, or a combination of confined and unconfined.

Processing Modflow version 5. 3 is included in the first edition of the book 3D-Groundwater Modeling with PMWIN published by Springer-Verlag.

Modflow Model

Processing Modflow (PMWIN) is a comprehensive integrated groundwater modeling system that is used by many organizations, such as research institutions, consulting firms, agencies, and entities of the United Nations.

The computer program (HST3D) described in this report simulates heat and solute transport in three-dimensional saturated ground-water flow systems.

A model for 2D or 3D saturated-unsaturated, variable-density ground-water flow with solute or energy transport.

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