A system was created to help plan for floods in DeKalb County, Georgia. The researchers used a model to predict how much water would run off during storms based on different soil types and paved areas. They stored this runoff information on computer files and used it to simulate flood scenarios. To do this, they needed to know the types of soil and paved areas in the area, as well as the size of the drainage basin. This system can help with land-use planning and designing drainage systems to better prepare for floods.