GGSD Program Details for NETFLO

NETFLO

Category	Groundwater flow (3D)
Platform	DOS
Status	Public domain
Description	NETFLO is a model to simulate steady-state 3D 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 3D ground-water flow code. A special application of the network topology is to analyse flow through a system of discrete fractures. The algorithm of 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 1D line elements with linear basis function. Outputs pressure at all nodes and velocities and fluxes in all members, and determines all possible flow paths from the node representing the contaminant source to the discharge node, and the pertinent mean flow, retardation factor, time of travel and path length for each path. 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.
Cost	US Dollars 150
Data formats supported	None stated
Supplier in France	OECD Nuclear Energy Agency
Supplier in United States of America	International Ground Water Modeling Center