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Navigation: Online Guide to MODFLOW > Groundwater Flow Process

ZONE - Zone File

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Abbreviation in Name file

ZONE

Purpose

The Zone File  is used to specify zone arrays which can be used to specify the cells in a layer variable that are associated with a parameter.

Documentation

Harbaugh, A.W., Banta, E.R., Hill, M.C., and McDonald, M.G., 2000, MODFLOW-2000, the U.S. Geological Survey modular ground-water model -- User guide to modularization concepts and the Ground-Water Flow Process: U.S. Geological Survey Open-File Report 00-92, 121 p.

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. https://doi.org/10.3133/tm6A16

Supported in

MODFLOW-2000

MODFLOW-2005

MODFLOW-LGR

MODFLOW-CFP

MODFLOW-NWT

MODFLOW-OWHM

Other Notes

Zone arrays are used in the ADV2, ETS, EVT, HUF2, KDEP, LPF, LVDA, RCH, and UPW input files.

Input Instructions

Input to define zone arrays is read from the file that is specified with "ZONE" as the file type. Zone arrays can be used to specify the cells in a layer variable that are associated with a parameter.

FOR EACH SIMULATION

Data Set 0

[#Text]

Item 0 is optional—“#” must be in column 1. Item 0 can be repeated multiple times.

Data Set 1

NZN [ZONEPRINT]

Items 2-3 are repeated for each of the NZN zone arrays.

Data Set 2

Data Set 3

IZON(NCOL,NROW) - U2DINT