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Online Guide to MODFLOW

Navigation: Observation Process

DTOB - Drain Return Observation Package

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Abbreviation in Name file

DTOB

Purpose

The Drain Return Observation input file allows observation of flows in the Drain Return package.

Documentation

Banta, E.R., 2000, MODFLOW-2000, the U.S. Geological Survey Modular Ground-Water Model - Documentation of Packages for Simulating Evapotranspiration with a Segmented Function (ETS1) and Drains with Return Flow (DRT1): U.S. Geological Survey Open-File Report 00-466, 127 p.

release.txt

Related Packages

Head-Dependent Flux Boundary packages

Drain Return package

Drain package

Supported in

MODFLOW-2000

Other Notes

The Drain Return package must be used in models in which the Drain Return Observation input file is used.

Input Instructions

Input for the file used to specify flow observations using the DRT1 Package is read from a file that is specified with “DTOB” as the file type listed in the name file.

Data Set 0

[#Text]

Item 0 is optional and can include as many lines as desired. Each line needs to begin with the “#” character in the first column.

Data Set 1

NQDT NQCDT NQTDT (free format)

Data Set 2

TOMULTDT  EVFDT IOWTQDT (free format)

Read items 3, 4, and 5 for each of NQDT groups of cells for which flow observations are to be specified for features simulated with the DRT1 Package.

Data Set 3

NQOBDT NQCLDT (free format)

Data Set 4

OBSNAM IREFSP TOFFSET HOBS STATISTIC STAT-FLAG PLOT-SYMBOL (free format)

Read item 4 for each of NQOBDT observation times for this group of cells. STATISTIC and STAT-FLAG are ignored if IOWTQDT > 0.

Data Set 5

Layer Row Column Factor (free format)

Read item 5 for each cell in this group; the number of cells equals the absolute value of NQCLDT from item 3.

Read items 6 and 7 if IOWTQDTQDG > 0.

Data Set 6

FMTIN IPRN (free format)

Data Set 7

WTQ(1,1), WTQ(1,2), WTQ(1,3), ... , WTQ(1,NQTDR) (format: FMTIN)

WTQ(2,1), WTQ(2,2), WTQ(2,3), ... , WTQ(2,NQTDR)

...

WTQ(NQTDR,1), WTQ(NQTDR,2), WTQ(NQTDR,3), ... , WTQ(NQTDR,NQTDR)

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