1. Click on Animation on the homepage to bring up the Applet.

2. This scenario of constant erodibility, constant climate and no tectonic uplift is the default. So there is no need to change any parameters. Simply click on the Run button as pointed by the step 2 arrow shown in the above figure to start the simulation.

3. You can click on the horizontal bar (as pointed by the step 3 arrow in the above figure) and drag it to different horizontal position to change the azimuth angle of viewing.

4. You can click on the vertical bar (as pointed by the step 4 arrow in the above figure) and drag it to different vertical position to change the elevation angle of viewing.

5. The total number of iteration and current iteration will be shown in the area pointed by step 5 arrow.

6. Click on the Snapshots tab to see the still images at every 25% iterations. Branching channel networks are developing and extending headward. Note your simulation may not look exactly like the figure shown here due to the randomness in the model.



1. In this scenario, the erodibility changes (or there is an erodibility break) at row 15 (y = 15). The erodibility for rows 15 and above is 0.04 and that for rows below 15 is 0.01.

2. Click on the Erodibility Tab as pointed by step 2 arrow.

3. Click on the radio button next to "break at y" as pointed by step 3 arrow.

4. Click on the slide bar as pointed by step 4 arrow and drag it down until the y value is equal to 15.

5. Click on Top radio button as pointed by step 5 arrow.

6. Click on the slide bar as pointed by steps 6 arrow and drag it down until the erodibility value next to the Top button is equal to 0.04.

7. Click on the Run button as pointed by step 7 arrow to run the model.

8. Click on the Snapshots tab to see the still images at every 25% iterations. Branching channel networks are developing and extending headward. As the erosion gets into the softer part of the terrain (higher erodibility), the shape of the channel looks fuzzier as compared to the hard part of the terrain (lower erodibility). Note your simulation may not look exactly like this one due to the randomness in the model.

 

1. In this scenario, everything stays as default except that there will be tectonic uplift for rows 40 and above. In essence, this scenario simulates a vertical fault at row 40 (y = 40).

2. Click on Tectonics tab as pointed by step 2 arrow.

3. Click the radio button next to “break at y” as pointed by step 3 arrow.

4. Click on the slide bar as pointed by step 4 arrow and drag it to the right until the y value is equal to 40.

5. Click on Top button as pointed by step 5 arrow.

6. Click on the slide bar as pointed by step 6 arrow and drag it down until the uplift rate value next to the Top button is equal to 0.0001.

7. The Bottom button will be disabled as pointed by Step 7 arrow.

8. Click on the Run button to run the model.

The user may also do any of the following steps as he/she wishes:

9. To see the profiles, click on Profiles tab. To see the average profile, do nothing (this is the default). The profiles will be displayed at every 10% of the total iterations.

10.To see the column profiles click on the Column Profile subtab and drag the slider to select a column value. Profiles will be displayed at every 10% of the total iterations.

11.To see the row profiles click on the Row Profile subtab and drag the slider to select a row value. Profiles will be displayed at every 10% of the total iterations.

12.To see the hypsometric curves, click on the Hypsometric tab. Hypsometric curves will be displayed at every 10% of the total iterations.

13.Click on the Snapshots tab to see the still images at every 25% iterations. Branching channel networks are developing and extending headward in the stable portion of the terrain as previous scenarios. Alluvial fans are developing along the boundary between the stable and uplifting parts of the terrain. Branching channel networks are also developing and extending headward on the uplifted plateau. Note your simulation may not look exactly like this one due to the randomness in the model.

 

1. In this scenario, all parameters are the same as scenario 3 except the climate is changing from wet to dry.


2. Click on the Climate tab as pointed by step 2 arrow.

3. Click on the radio button next to “Decreasing” as pointed by step 3 arrow.

4. Keep the default Low value 0.05.

5. Click on the radio button next to "High" as pointed by step 5 arrow.

6. Click on the slide bar pointed by step 6 arrow and drag it down until the High value is equal to 0.15.

7. Click on the Run button to run the simulation.

8. Click on the Snapshots tab to see the still images at every 25% iterations. Branching channel networks are developing and extending headward. Alluvial fans are developing initially but do not grow much as the climate turns drier and diffusive process starts to dominate. The final landform looks very smooth due to the dominance of diffusive process in an increasingly drier climate. Note your simulation may not look exactly like this one due to the randomness in the model.


 

 
 
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