- A broad array of computer models has been developed for evaluating reservoir operations. Selecting a modeling and analysis approach for a particular application depends upon the characteristics of the application, the analysis capabilities provided by alternative models, and the background and preferences of the analysts. The objective of the paper is to contribute to ongoing efforts throughout the water-management community in sorting through the numerous reservoir-system analysis models and better understanding which methods might be most useful in various types of decision-support situations. Models are inventoried and compared from a general overview perspective, with an emphasis on practical applications. Considerations in formulating a modeling approach are outlined. ASCE.