This article describes the application of computational deci-sion analytic techniques for a national policy decision. It constitutes an example of the increasing use of modern com-putational decision methods to assist in decision-making in society. An integrated flood catastrophe model is presented as well as some results of a case study made in the Upper Tisza region in north-eastern Hungary. Background data was complemented by interviews with different stakeholders in the region. We demonstrate how an implementation of a simulation and decision analytical model can provide insights into the effects of imposing different policy options for a flood risk management program.