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RECORD NUMBER: 42 OF 168

OLS Field Name OLS Field Data
Main Title Complex Systems Analysis of Water Quality Dynamics; The Feedback Systems Structure.
Author Knigh, John E. ; Hine, William W. ;
CORP Author Georgia Inst. of Tech., Atlanta. Environmental Resources Center.
Year Published 1970
Report Number ERC-0570; OWRR-A-023-GA; 03731,; A-023-GA(1)
Stock Number PB-196 901
Additional Subjects ( Water quality ; Management) ; ( Systems analysis ; Water quality) ; Economic conditions ; Simulation ; Sociology ; Decision making ; Attitudes ; Political objectives ; Programming languages ; Dynamo programming language
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NTIS  PB-196 901 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 110p
Abstract The objective of the research was to identify and demonstrate how the management and control of water quality in a region is influenced by prevailing social, political and economic conditions and to illustrate how these prevailing conditions and attitudes interrelate in an information feedback and control system to produce traditional modes of system response. A generalized model was tested under a wide range of policies and parameters to illustrate system response and sensitivity to changes. Industrial dynamics was used to model the multi-loop, non-linear feedback system, and the DYNAMO simulation language was used to program the model for digital computer simulation, testing, and experimentation. The modeling phase isolated system variables and identified their relative magnitudes, periods and phasing in historically polluted watersheds. Different policies and parameters were tested in a refined model to determine their effect on total system response. Water quality management and control was found to be deeply embedded in a complex, information feedback system involving social, political and economic pressures and forces. The complex system response was found to be insensitive to many parameter changes and unintuitive in behavior. (WRSIC abstract)
NTIS Title Notes Completion rept. 1 Jul 68-30 Jun 70.
PUB Date Free Form Sep 70,
Category Codes 13B; 5A; 60I
NTIS Prices PC A06 MF A01
Document Type NT
Cataloging Source NTIS/MT
Control Number 326515640
Origin NTIS
Type CAT