1. General Model Information

Name: Multi-Component Model of Phosphorus Dynamics in Reservoirs

Acronym: MCMPDR

Main medium: aquatic
Main subject: biogeochemistry
Organization level:
Type of model: not specified
Main application:
Keywords: phosphorus, eutrophication, reservoirs, impoundments, water quality modeling


Dr. Raymond A. Ferrara
Omni Environmental Corporation
211 College Road East
Princeton NJ 08540-6623 USA
Phone: +1 609-243-9393
Fax : +1 609-243-9297



The models available for simulating phosphorus dynamics and trophic states in impoundments vary widely. The simpler empirically derived phosphorus models tend to be appropriate for long-term, steady or near steady state analyses. The more complex ecosystem models, because of computational expense and the importance of input parameter uncertainty, are impractical for very long-term simulation and most applicable for time-variable water quality simulations generally of short intermediate time frames. An improved model for time variable, long-term simulation of trophic state in reservoirs with fluctuating inflow and outflow rates and volume is needed. Such a model is developed in this paper representing the phosphorus cycle in two layer (i.e. epilimnion and hypolimnion) reservoirs.
The model is designed to simulate seasonally varying reservoir water quality and eutrophication potential by using the phosphorus state variables as the water quality and indicator. Long-term simulations with fluctuating volumes and variable influent an effluent flow rates are feasible and practcal. The model utility is demonstrated through application to a pumped storage reservoir characterristic of these conditions.

Model purpose
Long-term (i.e., years) simulation of phosphorus and the trophic state in impoundments.

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): FORTRAN

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

Griffin, T.T., and Ferrara, R. A., 1984. A Multicomponent model of Phosphorus Dynamics in Reservoirs. Paper No. 83124 of the Water Resources Bulletin, Vol. 20, No. 5, October 1984.
Gray, W. G.. 19?? : Physics-based Modelling of lakes, Reservoirs, and Impoundments, page 229. Edited by author. (Documented Models, Round Vally Reservoir Multi-Compnent Phosphorus Model Documentation by Raymond A. Ferrera and Thomas Griffin).

V. Further information in the World-Wide-Web

VI. Additional remarks

Last review of this document by: T. Gabele: 10. 10. 1998
Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:45 CEST 2002

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