Abstract
A Computer Graphic Model (CGM) was realized on a personal computer for the purpose of river water pollution simulation and planning. With the aid of common software AutoCAD, a color map of a complex river system was established and a suite of graphic symbol blocks such as pollution source, water intake, wastewater treatment plant etc. was designed to fit the needs of basin pollution management and planning. A person can insert, move/remove or modify these symbol blocks in the CGM of the river basin freely. While a new idea is confirmed, a simulation program POLSIM (written with AutoLISP) can be started which redraws the river with different width and color by the mean flow quantity and water quality. The result of a case study and a group of photographs is presented. The methodology of CGM makes the planning process of basin water pollution control easier, visual and interactive. CGM is a friendly tool to link the decision maker, planner and system analyst with active graphics.
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