1. General Model Information


Acronym: NETFLO

Main medium: terrestrial
Main subject: biogeochemistry, hydrology
Organization level: ecosystem
Type of model: not specified
Main application:
Keywords: saturated, groundwater flow, fractured media,steady state, darcy's law


Kent Lantz
Intera Inc
6850 Austin Center Blvd., Suite 300, Austin, TX 78731
Phone : +1 512 346 2000
Fax : +1 512 346 9436
E-mail : kdlantz@dpcmail.dukepower.com


B.S. RamaRao and S.B. Pahwa (Intera Environmental Consultants).


NETFLO is a model to simulate steady-state three-dimensional ground-water flow in a heterogeneous medium using an equivalent network of series and parallel flow members. Where the stratigraphy does not suggest a particular network configuration, a network may be specified along principal stream tubes specified with a more general three-dimensional ground-water flow code. A special application of the network topology is to analyze flow through a system of discrete fractures. The algorithm of NETFLO is based on the application of Darcy's Law along each member (or branch) of the network and conservation of mass at each node. The boundary conditions may be either of prescribed pressure or take the form of sources/sinks at the boundary nodes. The code is mathematically equivalent to a set of one-dimensional finite line elements with linear basis function. NETFLO outputs pressure at all nodes and velocities and fluxes in all members. Furthermore, the code determines all possible flow paths from the node representing the contaminant source (e.g., a nuclear waste repository) to the discharge node, and the pertinent mean flow, retardation factor, time of travel and path length for each path. NETFLO runs in batch mode and creates text output files. Example data sets are provided, which can be copied and edited with a text editor for individual problems. NETFLO is a public domain program distributed on DOS-formatted disks containing source code, executable image, and example data sets. The program documentation includes installation instructions and user's manual

II. Technical Information

II.1 Executables:

Operating System(s): DOS 3.0 or higher ,Intel 80i86-based computer, math coprocessor, 640 Kb RAM, at least 1 Mbfree disk space for programs, source files, and example data files and output files.

II.2 Source-code:

Programming Language(s):

II.3 Manuals:

II.4 Data:

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

III.2.1 Input

III.2.2 Output

IV. References

V. Further information in the World-Wide-Web

VI. Additional remarks

Last review of this document by: 7.7.1997 -
Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:46 CEST 2002

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