Bi-directional sewer-river linking through the OpenMI software
Smolders, Sven Neyskens, Isabelle Willems, Patrick Vaes, Guido Van Assel, Johan #
International Conference on Urban Drainage edition:11th location:Edinburgh, Scotland date:31 Aug. - 5 Sept. 2008
The European Water Framework Directive stresses the importance of integrated water management at the basin scale. In the scope of this directive, the Open Modelling Interface and Environment (OpenMI) was developed to enhance the communication between software packages. One of the interesting applications of the use of the use of the OpenMI is the bidirectional linking of submodels for the various components of the integrated water system.
The OpenMI was reviewed for its technical value as well as for its usefulness when linking hydraulic river and sewer models implemented in InfoWorks CS 7.51 and InfoWorks RS
7.51. The effect of the bi-directional linking on the model results was investigated. Based on a single test case, it was concluded that the choice of the simulation timestep and the source of the trigger (that controls the data exchange between the models) in OpenMI are very important for the preciseness of the results.
After application to a real integrated sewer-river system case in Belgium, computational times appeared to be longer than the sum of the computational times of the individual systems. Also data storage problems were encountered. Results pointed out that long term simulations with
bi-directionally linked hydraulic models may not be realistic with the present generation of computers.