Surface Water Runoff Modeling

Analysis

Using the model

The Stella model allows you to enter 4 values:

Clicking under each of these categories opens a pull down menu. Highlighting your choice enters the value. The Curve Number and Runoff values in the light blue box are automatically updated.

The model will allow you to discover the effect of different soils and land uses on runoff. Plan a simulation that will evaluate the effect of different kinds of Land Use. The results of your simulation should allow you to rank the Land Use from least to most runoff.

Write a description of your simulations. What did you do? Explain how you controlled all of the variables and systematically changed the Land Use.

Group the different Land Uses into 3 groups:

Uses with:

What characteristics do the uses within each group share?

Using 3 land uses from each of your 3 groups, plan a simulation that will evaluate the effect of different Hydrologic Conditions on runoff. Explain your results.

Using the same 3 land uses from each of your 3 groups, plan a simulation that will evaluate the effect of different Soil Groups. Explain your results.

Use the model to determine the runoff from your school in a 25 year storm.