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.

FOR EACH SIMULATION

Data Set 0

[#Text]

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

Text

Data Set 1

NZN [ZONEPRINT]

Explanation of variables

NZN NZN—is the number of zone arrays to be defined.  In MODFLOW-2000, the maximum number of zone arrays is 1000. ZONEPRINT an optional print flag that when set >0 writes all zone arrays to file called “ZONE_Arrays.txt.” This will not occur if ZONEPRINT is not present or set to < 1. ZONEPRINT is only included in MODFLOW-OWHM.

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

Data Set 2

Data Set 3

IZON(NCOL,NROW) - U2DINT

IZON