The European Soil Erosion Model is a process-based computer model for simulating soil erosion and runoff from fields and small catchments for single rainstorm events. The soil erosion processes are described by a series of algorithms linked together to form the model. To make the computer model more accessible to users, a graphical user interface is currently under development. This paper describes some of the main interface features, including catchment visual representation, easy access to input data, and element-wise dynamic output of simulation results.