Tracer Tool

The purpose of the tool is to provide a quick way to setup EFDC computational options and boundary conditions for point source tracer injections. Figure 1 shows an example of the tracer tool. The list in the upper left of the Dye Injection Point frame shows the tracers currently defined. The list on the right shows all the currently defined flow type cells. The user needs to assign an existing cell or create a new dye injection point and then assign the flow and dye concentration for each point.

Figure 1  Tracer generation tool.

To define an existing boundary cell as a tracer, select the cell from the list on the right and select the INS key to add it to the tracer list. You must then define the flow and dye injection characteristics for each tracer cell. You can delete tracers by selecting the cell on the left and pressing the DEL key. You can also create a tracer at a new location by selecting INS and entering the location for the tracer in the I, J and Layer boxes. In this example the cell I=20, J=16, has been selected to produce 5 pulses over 5 days as shown in Figure 2 below.

Figure 2   Dye tracer results in ViewPlan.