1. SIMILE : Modeling tool Modeling & river systems SIMILE as a modeling tool - What it is & what can we use it for? ● Navigate in SIMILE - Example: Bank account

2. Models as a management tool Models as a scientific tool

3. SIMILE as a modeling tool www.simulistics.com Visual modeling environment - Build model without learning programming - Display concept & relationship using diagram: ‘stocks’, ‘flows’ and ‘influences’ - GUI for simulation control & specifying inputs - Visualize & compare the model behaviors in graphs, tables

4. SIMILE as a modeling tool www.simulistics.com What can we use it for? - Rate expressions for biological, chemical, or physical processes (differential equations) Ex: Mass balance or accounting, Growth dynamics, Respiration - Scenario analysis Ex: Effect of flow velocity on gas exchange between river-atmosphere

5. SIMILE 4.4 Download : http://simulistics.com/products/simile.php Example models in ecosystem science: Download  Models

6. Navigate in SIMILE Start > All Programs > Simulistics > Simile v4.4

7. Navigate in SIMILE Overall modeling scheme Conceptual design (diagram) Enter values for parameters/stocks or Describe equations Choose output display & Set run conditions Run model Tutorial: http://simulistics.com/tutorials/index.htm Example: Bank account Run-time environment

8. Bank account: Conceptual design Stock or compartment: an account Flows: Interest & withdrawal Parameter: Interest rate

9. Bank account: Enter values for parameters/stocks or describe equations For time-dependent model - Set initial value for stocks (compartments) - Define parameters (flows & variables) Direct valuesEquations to describe behaviors Variables that influence the parameter ConstantTime-series

10. Run-time environment List of parameters/stocks Create plotCreate table 1. Set execution condition in ‘Run control’ & ‘Run settings’ 2. Set display preference 3. Run Run

11. Run model & view results