=====Tutorial - Time events=====

This tutorial gives some examples of how to model events that occur at specific time points in a simulation. 

==== Base model ====

All examples are based on the following base model, which calculates a dummy value we can use for our event experiments. You can download the model from {{ :base_event_model.eco |here}}

1. Edit [[simulation settings]]. Set

  * **Time unit**: Days
  * **Time mode**: Time
  * **Start time**: 0.0
  * **End time**: 100.0
  * **Start date**:2000-01-01

  * **Output options**: Produce additional output
  * **Time points**: from start to end with a 1.0 increment

2. Create a material named //Poison// with the unit //mg//.

3. Create two compartments //Sky// and //Soil//. Set the initial condition for //Sky// to be **500** (mg) of **Poison**.

4. Add a transfer from //Sky// to //Soil// and set its equation to //"30+sin(time/5)*20+cos(time/3+2)*10"//

5. Add a transfer from //Soil// to //Sky// and set its equation to //"30+sin(time/3+2)*10+cos(time/7+3)*20"//
\\ //*note: make sure that TC is **not** checked for both transfers// \\

6. When run, the model will output a Sky and Soil concentration like this:

{{ :time_event_tutorial_base_model_plot.png?700 |}}

Continue with [[tutorial - time events - monthly max|Next]]

===== See also =====

  * [[tutorial - time events|First page]]
  * [[tutorials|Tutorials]]