Discrete Events Simulation Model Applied to Large-Scale Hydro-Systems

This paper presents the principles of simulation model developed with DEVS formalism for large-scale hydro-systems management and planning. This simulation model, being DEVS-based, is natively object-oriented, open for communication with other models and is suitable for parallel execution in multiprocessor and distributed environments. It is designed as a part of the hydro-information system, whose strategic objective is to create environment for the optimum management of water resources and to address and resolve the existing and potential conflicts of interest in the region, related to multi-purpose use of water, and the misalignment of interests of the various stakeholders in the river basin. The functional objective of the simulation model is to support water management decision-making (i.e. to aid users in the assessment of the consequences of various management scenarios and to support planning within various hydrologic, climatic, economic, regulatory and political constraints). The combined use of the rainfall/runoff model and DEVS-based simulation for system elements represents a new approach when it comes to water and hydropower management. The model and simulation core make a solid base for the application of optimization algorithms, in order to provide more automated decision support system. A case study of River Drina Basin simulation model, named "Drina" Hydro-Information System is also presented.