The Runoff Simulation shows results from running the TR-55 runoff model and the Small Storm Hydrology Model for Urban Areas for a single 24-hour rain storm over a hypothetical small unit of land with a single land cover class and a single hydrologic soil group.
Using the slider you can adjust the level of rainfall within 24 hours from a small rainstorm to a hurricane.
A help bubble describing each land cover type will appear as you hover over that land type.
You can select from four hydrologic soil groups defined by the U.S. Department of Agriculture.
As the parameters are selected, the visualization changes but it will always show a cube of land with the land cover on top and the soil type on the sides.
This runoff simulation is only a simplified way of demonstrating the effects of different land cover and soil types on water distribution.
Learn about the collaborating organizations that developed the Runoff Simulation.