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RSMM: A network language for modeling pollutants in river systems

Narasinga B. Rao

Department of Information Systems and Decision Sciences California State University Fresno, California 93740

Charles R. Standridge

Pritsker and Associates, Inc. P. O. Box 2413 West Lafayette, Indiana 47906

Jerald L. Schnoor

Program In Environmental Engineering The University of lowa lowa City, lowa 52242

Predicting the steady state distribution of pollutants in rivers is important for water quality managers. A new simulation lan guage, the River System Modeling Methodology (RSMM), helps users construct simulation models for analyzing river pollution. In RSMM, a network of nodes and branches represents a river system. Nodes represent elements such as junctions, dams, withdrawals, and pollutant sources; branches represent homo geneous river segments, or reaches.

The RSMM processor is a GASP V program. Models can employ either the embedded Streeter-Phelps equations or user supplied equations. The user describes the network diagram with GASP- like input cards.

RSMM outputs may be printed or stored in an SDLTM* database. An interface between SDL and DISSPLA provides high quality graphical output.

Key Words: combined models • environmental science • fluid flow • network models • resource management, special-purpose languages

SIMULATION, Vol. 40, No. 6, 213-225 (1983)
DOI: 10.1177/003754978304000604
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