1. General Model Information

Name: Hydrodynamic model: Hydro.Mass balance model: Ph-ala

Acronym: PH-ALA

Main medium: aquatic
Main subject: biogeochemistry, hydrology
Organization level: ecosystem
Type of model: partial differential equations, ordinary differential equations
Main application:
Keywords: lake ecosystem, freshwater, water quality, hydrdynamics, phytoplankton


Dr. Paolo Viotti
Dept. Hydraulic, Transportation and Roads
Faculty of Engineering
University of Rome "La Sapienza"
Via Eudossiana 18
I-00184 Roma, Italy
Phone: +39 6 44585638
Fax : +39 6 44585217
email: Viotti@cenedese2.ing.uniroma1.it



The system is composed by two different models, a hydrodynamic model and a mass balance model:
Hydrodynamic model parameters: velocity components, temperature, baroclinic component of the pressure, density anomaly.
Mass balance model parameters: phytoplankton concentration, phosphorus concentration, rate of phosphorus release from the bottom sediment, phosphorus concentration in the bottom sediment, residual components of the velocity, phytoplankton growth rate, phosphorus fraction in the algal biomass, sedimentation velocity.
Forcing functions: wind action
Necessary input: wind velocity and direction over long periods, initial temperature distribution in the lake, pollutant injection location and mass injection, daily hours of sunshine.

Model purpose
To develop a model able to analyze over many years the eutrophication trend in a lake taking in account the three-dimensional characteristics of the hydrodynamic field.

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): DOS

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

V. Further information in the World-Wide-Web

VI. Additional remarks

Last review of this document by: R. Patzak : 20.August 1997
Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:47 CEST 2002

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