ZONEBUDGET: A Program for Computing Subregional Water Budgets for MODFLOW Groundwater Flow Models

Release Date:

Overview of ZONEBUDGET

Zonebudget (ZONBUD) is a computer program that computes subregional water budgets using results from the MODFLOW ground- water flow model. The user designates the subregions by specifying zone numbers. A separate budget is computed for each zone. The budget for a zone includes a component of flow between each adjacent zone.

Note:  The MODFLOW 6 distribution contains another version of ZONEBUDGET which only works with MODFLOW 6.


Download Current Version of ZONEBUDGET

The current release is ZONEBUDGET v.3.01, released December 18, 2009.


Documentation for ZONEBUDGET

Harbaugh, A.W., 1990, A computer program for calculating subregional water budgets using results from the U.S. Geological Survey modular three-dimensional ground-water flow model: U.S. Geological Survey Open-File Report 90-392, 46 p.,

Documentation about changes to version 3 are contained in the file zonbud3.pdf [72KB PDF].


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 (