Development of a simplified process oriented rainfall runoff model

The paper describes the concept of a simplified rainfall runoff model. Desp ite the simplifications the model is physically based and makes use of avai lable high resolution data like digital elevation data. For this method the catchment area is split into two domains: the 3D convergence domain, which consists of all grid cells around the drainage line with merging flowpaths . The complete model is used to simulate the runoff process within this dom ain. The hillslope domain consists of 2D hillslopes, which drain into the c onvergence domain. Runoff generated on those hillslopes is estimated by a s implifed method, which is based on the flowtime as parameterization of topo graphy. In that way, the areas, which are particularly important, are model ed in detail, whereas the less important areas are lumped together by a sim plified, statistical approach. (C) 1999 Elsevier Science Ltd. All rights re served.