“…The DITTY DSS represents a unitary framework for many DSS already designed and provides an answer to "still open methodological questions about the development and structure of operational decision support systems with and for European decision makers in the field of water resource management" (Mysiak et al, 2002). Several important decision support systems have been developed for specific application,s, such as Bayesian Networks based DSS for the management of natural resources (Bromley et al, 2005), MULINO-DSS for the computer-aided waterresource management (Mysiak et al, 2002(Mysiak et al, , 2005, DSS for coastal areas sustainable development (Carvalho, 2002), WaterStrategy-Man (WSM) DSS (ProGEA, 2013), DSS for Water-Resources Management under uncertainty (Pallottino et al, 2002) fit the general structure proposed in the DITTY DSS (see also Casini et al, 2005;Casini et al, 2007). The DSS was tested in the following lagoons: Ria Formosa (Portugal), Mar Menor (Spain), Etang de Thau (France), Sacca di Goro (Italy), and Gera (Greece).…”