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Periphyton dynamics in lotic environments : a simulation model

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  • The simulation model described below is based on the assumption that the periphyton community can be treated as a unit, without a quantitative concern for the dynamics of its many constituent populations. The function statements and parameter estimates incorporated into the model are based on experimental work with laboratory streams and some observational data from Berry Creek Experimental Stream. The approach used here to model the dynamics of periphyton communities in streams is essentially the same approach employed by Jay W. Forrester to model industrial and urban systems. A particular system is identified by establishing a boundary within which the system interactions take place. Level (state) variables and rate (flow) variables are linked together by a complex system of feedback loops and various intermediate concepts (modules), and these components represent the basic structural elements within the boundary. Function statements that represent relation between structural components of the system are written and programmed in some suitable simulation language (for example, MIMIC or DYNAMO). The computer output usually provides numerical values of particular variables and a plot of these values against time.
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  • Master files scanned at 600 ppi (256 Grayscale) using Capture Perfect 3.0 on a Canon DR-9080C in TIF format. PDF derivative scanned at 300 ppi (256 B&W), using Capture Perfect 3.0, on a Canon DR-9080C. CVista PdfCompressor 3.1 was used for pdf compression and textual OCR.
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file details Internal_Report_28.pdf 2017-07-18 Público Baixar