DYNAMIC, DISTRIBUTED SIMULATION OF WATERSHED EROSION - THE KINEROS2 AND EUROSEM MODELS

Two models, KINEROS2 and EUROSEM, that simulate hydrologic event erosi on on small catchments as a distributed, dynamic convective transport process are described briefly. Each employs a numerical solution of th e mass balance equation, and uses time distributed rainfall rates as i nput. The equations for convective transport of sediment are quite sim ilar to the kinematic equation for hydrologic response of a surface or channel. The features of the models are outlined, and the areas where research is needed are indicated. An example of simulation of rainfal l plot test data is shown, demonstrating the practical value of dealin g with particle size distribution, and an example is given of the valu e of these models in developing improved slope length factors in lumpe d models.