1. General Model Information

Name: SAWAH 2.0 - Simulation Algorithm for Water flow in Aguic Habitats.

Acronym: SAWAH


Main medium: terrestrial
Main subject: hydrology, agriculture, soil science
Organization level: ecosystem
Type of model: partial differential equations (1D)
Main application:
Keywords: water-balance, water transport, richards equation

Contact:

Dr.ir. H.F.M. ten Berge.
Research Institute for Agrobiology and Soil Fertility (AB-DLO), Dept. Agrosystems Research, P.O.Box 14, 6700 AA Wageningen, THE NETHERLANDS.
Phone: +31.317.475951 / 475953
Fax: +31.317.423110
email: sarpwag@ab.dlo.nl / h.f.m.tenberge@ab.dlo.nl

Author(s):

Abstract:

The soil water balance model SAWAH simulates one-dimensional vertical movement of water in soil based on the Darcy equation and mass conservation. The model handles both saturated and unsaturated flow, including perched water tables. It was designed to model water flow in rice fields.

Purpose of the model:

Model parentage: -

Source of the AbstractCAMASE Register of Agro-ecosystems Models


II. Technical Information

II.1 Executables:

Operating System(s):
Contract necessary:
Costs: : Dfl. 270,=.
Comments:

II.2 Source-code:

Programming Language(s): Microsoft FORTRAN-77.

II.3 Manuals:



II.4 Data:



III. Mathematical Information


III.1 Mathematics


III.2 Quantities

Rate variables: Fluxes between compartments, changes of water content per layer, change of ponded water depth, overall water balance terms rainfall, capillary rise etc.

State variables: Water content per layer, depth of ponded water, cumulative water balance terms.

III.2.1 Input

Soil characteristics, ground water daily values. Input check in model: No.

III.2.2 Output

All states and rates variables.
Basic spatial unit: m2.
Time interval of simulation: Variable: seconds-minutes for flux calculations; days for interacting with higher level models (crops).

IV. References


Berge, H.F.M. ten, D.M. Jansen, K. Rappoldt & W. Stol, 1992. The soil water balance module SAWAH: description and users guide. Simulation Report CABO-TT no. 22. Centre for Agrobiological Research and Dept. of Theoretical Production Ecology. Wageningen. The Netherlands. 78 pp. and 4 appendices.
Berge, H.F.M. ten, K. Metselaar, M.J.W. Jansen, E.M. de San Agustin & T. Woodhead, 1995 / 1996 ?. The SAWAH riceland hydrology model. Accepted for publication in Water Resources Researches.


V. Further information in the World-Wide-Web


VI. Additional remarks

Parentage: -
Last review of this document by: T. Gabele: Dec 10 1997
Status of the document:
last modified by Joachim Benz Mon Jul 2 18:31:37 CEST 2007

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