The intention of the present study is to develop and apply a methodology for integrated catchment modelling based on the use of conceptual models for each subcomponent. These conceptual models will replace the existing (hydrodynamic) models for simulating river courses, sewer systems, estuaries, rainfall-runoff, groundwater hydrology and water quality components. Conceptual models can be situated somewhere between empirical and physically-based models: they have a limited physical basis but need to be calibrated with measurements or model results.

This report summarizes the results of the first work package of this study. A literature review was set up to identify the possible conceptual model structures that can be used for modelling every subcomponent of the integrated model. The overview contains a description of the derivation, algorithms and application of a large number of conceptual models. One of the key elements here was the possibility of these models to conduct longterm simulations in a very short period.