1. General Model Information

Name: GARDA3-D

Acronym: GARDA_3D


Main medium: aquatic
Main subject: hydrology
Organization level: ecosystem
Type of model: partial differential equations (finite differences,3D)
Main application:
Keywords: lake hydrodynamics, wind driven circulation

Contact:

Dr. Giovanni Pecenik and DR. Vincenzo Casulli
Dept. Env. Physical Chemistry
Dorsoduro 2137
I-30123 Venezia
Italy
Phone: +49 41 5298587
Fax : +49 41 5298594
email: pcnk@pcnk.dcf.unive.it

Author(s):

Casulli, V., and Pecenik, G.

Abstract:

THREE- DIMENSIONAL HYDRODYNYMIC MODEL OF THE GARDA LAKE.
The lake of Garda is the widest Italian fresh water resource. Its major physiographic features are: area 379 km2, perimeter 185 km, height 65 msl, maximum depth 346 m, major axis 51.6 km, minimum axis 17.2 km. Garda's lake circulation is predominantly wind driven with periodic convective overturn.
The hydrodynamic model is based on the three-dimensional Reynold's equation. The numerical method is based on a semi-implicit finite-difference formulation allowing to reproduce the circulation with a very fine mesh adopting a relativaly high time step. This horizontal grid covers the whole surface with 350 x 210 nodes with a spatial step of 125 m. Along the vertical a space step of 1 m is included up to the maximum depth, thus yielding 6176100 grid points of which 553379 are active. The model has been seen to be computationally stable and simulation performed adheres to hydodynamic situations under constant wind conditions. The model, which is the first and, so far, the only one describing Garda water circulation, is optimized for the supercomputer CRAY Y-MP8/432 and it is easily extendible to include biochemical and ecological relevant variables.

Model purpose
The model represents the first known attempt to simulate water circulation in the Garda Lake.

Source of the Abstract:
Joergensen S.E., B. Halling-Soerensen and S.N Nielsen (Edts.) 1996: Handbook of Environmental and Ecological Modelling. CRC Press Boca Raton et al. 672 pp.


II. Technical Information

II.1 Executables:

Operating System(s):

II.2 Source-code:

Programming Language(s):

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

Casulli, V., and Pecenik, G., 1994. Modello Indrodinamico Tridimensionale dei Lago di Garda. In: Cimeca, Ed. Scienza e supercalcolo al Cimeca, 1994, pp. 255-258.


V. Further information in the World-Wide-Web


VI. Additional remarks



Last review of this document by: T. Gabele: 15. 10. 1998
Status of the document: -
last modified by Tobias Gabele Wed Aug 21 21:44:43 CEST 2002

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