4 
The Operational Dispersion Models and their applications have been described in detail 
by Dick and Soetje (1990), Schönfeld (1995), and Müller-Navarra et al. (1999). 
Concerning the Operational Circulation Model, technical reports have been published by 
Kleine (1993, 1994). Other papers discuss particular processes (Kleine and Sklyar, 1995) 
and the subject of model validation (Huber et al., 1994, Müller-Navarra and Ladwig, 
1997, Klein and Dick, 1999). 
This paper provides a brief description of the physical processes and numerics of the 
circulation model. Finally, some results of a model version that has been in operation 
since 01.01.1999 will be presented. 
Operational Models of BSH (and DWD) 
DWD: 
Meteorological models (GME and LM) 
(forecasts up to 78 h) 
of German Weather Service (DWD) 
Operational Wave Models 
(forecasts up to 78 h) 
of German Weather Service (DWD) 
Operational Drift and Dispersion Models (BSHdmod) 
(Lagrange or Eulerian) 
for conservative substances, oil and drifting objects 
Regional Models 
for river Elbe 
Fig. 1 : The model system of BSH driven by DWD models