# Pollutant in a Pond System

Mikhail Sabaev
*Project Java Webmaster: Glenn A. Richard*

Mineral Physics Institute

SUNY Stony Brook

### How to Use this Applet

In this applet, you are provided with a representation of a pond with an inflow stream
and an outflow stream. Using the available text fields, you can control several
parameters, and observe the results.

- C(s) represents the concentration of the pollutant in the inflow stream in milligrams
per liter.
- V is the volume of the pond in cubic meters.
- C(0) is the initial concentration of the pollutant in the pond in milligrams per liter.
- Q is the rate of flow of both the input and output streams in cubic meters per second.
- k is the decay rate of the pollutant in the pond in proportion of the total amount per
day.

After you have set the parameters, click the OK button to see the results. On the
schematic cross section of the pond, relative concentrations are shown by shades of gray,
with darker grays representing higher concentrations. You can use the *Previous Day*
and *Next Day* buttons to navigate through time, as is shown by the red dot on the *Relative
Concentration* graph, labeled C(t)/C(%). The points on the graph are listed in the *Relative
Concentration* chart. Progress in the direction of the final concentration limit is
shown in the *Progress* chart and graph.

### Mathematical Concepts

- Asymptotes
- Rates
- Proportions

### Source Code

Mikhail Sabaev: sabaevm@ug.cs.sunysb.edu

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