1. General Model Information
Main medium: aquatic
Main subject: hydrology
Organization level: ecosystem
Type of model: partial differential equations (finite differences,3D)
Keywords: lake hydrodynamics, wind driven circulation
Dr. Giovanni Pecenik and DR. Vincenzo Casulli
Dept. Env. Physical Chemistry
Phone: +49 41 5298587
Fax : +49 41 5298594
Casulli, V., and Pecenik, G.
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
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.
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
III. Mathematical Information
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