1. General Model Information

Name: Model for Unsaturated flow above a Shallow water-Table

Acronym: MUST_24

Main medium: terrestrial
Main subject: hydrology
Organization level: ecosystem
Type of model: compartment model
Main application:
Keywords: soil, unsaturated flow, shallow water-table, evapotranspiration, water-table depth, drain outflows, matrix pressure, pseudo steady-state approach


Dr.ir. P.J.M. de Laat
Infrastructure Hydraulics Environment, Hydraulic and Hydrologie Engineering
P.O.Box 3015
2601 DA Delft
Phone: +31.15.151826
Fax : +31.15.122921
email: pdl@ihe.nl



MUST is a Model for Unsaturated flow above a Shallow water-Table. The solution technique for vertical transport of soil moisture is based on a pseudo steady-state approach. The soil profile is schematized into a root zone and a subsoil. Transient flow in the subsoil is simulated by a succession of steady-state situations. The solution is obtained by combining the steady flow situations with the water balance for the root zone and the subsoil for given boundary flux conditions. The upper boundary flux is found from the given rate of rainfall and potential evapotranspiration, or may be computed by the evaporation module for standard meteorological data. The lower boundary flux may be found from a given water-table elevation, a relation between a flux and the water-table elevation, or a module that describes the drainage system.

Author of the abstract:
CAMASE Register of Agro-ecosystems Models

II. Technical Information

II.1 Executables:

Operating System(s): IBM compatible PC (AT or more)

II.2 Source-code:

Programming Language(s): FORTRAN-77

II.3 Manuals:

II.4 Data:

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

III.2.1 Input

III.2.2 Output

IV. References

Laat, P.J.M. de, 1980.
Model for unsaturated flow above a shallow water-table.
Agric. Res. Rep. 895, Pudoc, Wageningen.

Anonymous, 1995.
Design and operation of a subsurface irrigation scheme with MUST.
ICID, workshop on crop-water models (in print).

V. Further information in the World-Wide-Web

VI. Additional remarks

Last review of this document by: T. Gabele: 07.07. 1997 -
Status of the document:
last modified by Joachim Benz Mon Jul 2 18:31:37 CEST 2007

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