Abstract
I have developed an exercise in which retention/detention ponds are used to illustrate how computer models can be developed from field observations and conceptual models. In addition, the advantages and disadvantages of conceptual, physical, and computer models can be examined. Retention/detention ponds were chosen because they are relevant to such introductory-geology topics as flooding, soil erosion, and sediment pollution; they are relatively simple systems, and they are ubiquitous. The exercise consists of five parts: 1) making field observations (this could be replaced by a video or slides), 2) developing a simple conceptual model, 3) using the model, 4) modeling the system using system dynamics software (for example, STELLA® II), and 5) preparing a report that documents the observations and results of the exercise. The exercise combines careful observations with analytical thinking and group problem solving, introduces system thinking, and applies the scientific method to a dynamic geological proces...
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