Release Date:

Overview of ZONECONC

ZONECONC subgrid  of a steady-state solute-transport model.

Subgrid of a steady-state solute-transport model and initial tetrachloroethylene (PCE) concentration from simulated pre-remedial conditions, Savage Superfund site, Milford, N.H. (Modified from Harte, 2004)

ZONECONC tabulates concentration data using the results from the U.S. Geological Survey Modular Three-Dimensional Ground-Water Flow and Solute-Transport Model (MODFLOW-GWT). ZONECONC uses concentration data saved by MODFLOW-GWT in order to tabulate concentration-data statistics by zones of a ground-water-flow model. Zones are three-dimensional volumes of a flow model that are designated by zone numbers. The user assigns a zone number for each cell in the model either interactively by rectangular blocks or from an externally created zone file. ZONECONC allows for post processing of concentration data from MODFLOW-GWT in a quick and easy manner by tabulating zonal statistics to identify trends in concentrations.


Download Current Version of ZONECONC

The current release is ZONECONC v.1.5, released October 25, 2005.


Documentation for ZONECONC

Harte, P.T., 2005, A Computer Program (ZONECONC) for Tabulating Concentration Statistics Using Results from the U.S. Geological Survey Modular Three-Dimensional Ground-Water Flow and Transport Model: U.S. Geological Survey Open-File report 2005-1422, 21 p.,


Find MODFLOW-Related Software

Visit the MODFLOW and Related Programs page for a list of MODFLOW-related software.


Software License and Purchase Information

This software is a product of the U.S. Geological Survey, which is part of the U.S. Government.


This software is freely distributed. There is no fee to download and (or) use this software.


Users do not need a license or permission from the USGS to use this software. Users can download and install as many copies of the software as they need.

Public Domain

As a work of the United States Government, this USGS product is in the public domain within the United States. You can copy, modify, distribute, and perform the work, even for commercial purposes, all without asking permission. Additionally, USGS waives copyright and related rights in the work worldwide through CC0 1.0 Universal Public Domain Dedication (